Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!


by joo, published

Plotclock by joo Feb 12, 2014

Featured Thing!


A clock that plots time. Designed with makeability in a fablab/makerspace/hackerspace in mind.

You need:
- Laser cutter or 3D printer
- 1 Arduino
- 3 servos
- 1 dry wipe pen
- M3 nuts, bolts, thread tap

Update to V1.01:
added calibration routine and documentation to arduino code

see the instruction tab above for building instructions

wiki.fablab-nuernberg.de/w/Ding:Plotclock (german)

Recent Comments

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arre you able to include instructions on how to wire up the RTC to the plot clock??

Hai ,

Can you draw a smiley with the plotclock , is it possible
Who wants to write a source code to do this

Kind Regards

the PDF is meant to directly work on epilog laser-cutters (most common type in fablabs/hackerspaces), so lines to cut are 0.01mm and areas to engrave are in black without an outline. Using inkscape you sould be able to adapt it for commercial services, but i have no experience in doing so.

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Plotclock by joo is licensed under the Creative Commons - Attribution license.

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If you print this Thing and display it in public proudly give attribution by printing and displaying this tag. Print Thing Tag


Materials I used:

- Arduino uno
- Tower Pro 9g servos (those cheap ones from ebay)
- WB SL DRYWIPE MARKER, bullet tip
- A small custom servo adapter, there are shields or servo-arduinos that also can be used. You can also just use jumper wires: 5V to red servo wire, GND to brown or black servo wire and the arduino servopins connected to the yellow or orange servo wire

Building instructions:
(for version 1.01!)

1. Lasercut plotclock_beta1.pdf from 3mm material or 3D print plotclock_SUP7.skp
- the black areas in the pdf on the servo arms should be used to engrave some material away, so the servohorns settle in
- use thingiverse.com/thing:250204 for single STL files if you 3D print the clock (Thanks corben33!)

2. 3D print swee.stl or reuse some other cylindrical part for the sweeper

3. Tap 2.5mm holes with M3 thread

4. Assemble arms with M3 screws, gently adjust the counternuts so that the joints under the screw heads just have enough play for smooth movement (see joint picture).

5. load Arduino sketch plotclock_V1, see code comments for further information
- playground.arduino.cc/Code/time library is needed

6. Add some sort of cloth with double sided tape to sweeper

7. Attach servos to digital pin 2, 3 and 4, according to arduino sketch, test them without anything attached by plugging in the arduino (the photos show it being connected to 1, 2 and 3, which isn't optimal since 1 is also the TX pin, so during arduino startup the lifting servo jumps around)

8. Put everything together
- You may have to redrill the holes that are used for securing the servos, since some servo screws are a tight fit.
Acrylic is brittle and easily breaks wen the mounting holes are to small. Only push the servo arms onto their hubs, don't secure them with screws! For initial calibration do not mount the resting clip for the wiper (danger of collision with the pen). Glue or screw the servo arms to the acrylic parts.

9. When attaching the servo arms, make sure they can turn enough to reach every point on the drawing surface by manually turning them

10. Power the arduino, it should start a calibration cycle where every second the position of both servos changes by rotating exactly 90 degrees (see last image in gallery)

11. Change the SERVOFAKTOR, SERVOLEFTNULL and SERVORIGHTNULL values until everything matches up (see code for more information)

12. Attach the pen and the sweeper holder only after testing everything else

This description is still a bit of a WIP, so comment if you have any questions!


You must be logged in to post a comment.

Sembot on Apr 12, 2014 said:

Hai ,

Can you draw a smiley with the plotclock , is it possible
Who wants to write a source code to do this

Kind Regards

trueoracle on Apr 6, 2014 said:

Hi, I'm newbie to the 3D and 2D printing, and I would like to start with your design.
I'm finding quite a lot of problems in trying to upload the PDF design to services like PONOKO or SHAPEWAYS. They ask for SVG files, not PDF.
If I convert it to SVG with INKSCAPE, then the updloading fails because it ask for blue lines for cutting and red for engraving...
I'm sure that I can end up finding a way to do it, but I suspect that this is too much workaround for a simple task as uploading a design.
Could you please give some direction for doing this in Laser-cutting style?

joo on Apr 6, 2014 said:

the PDF is meant to directly work on epilog laser-cutters (most common type in fablabs/hackerspaces), so lines to cut are 0.01mm and areas to engrave are in black without an outline. Using inkscape you sould be able to adapt it for commercial services, but i have no experience in doing so.

joo on Apr 2, 2014 said:

bubbo: being inverted means the servos work inverted, so the "3000-" trick should work. You may have to change the SERVOLEFT/RIGHTNULL values quite a bit. Sadly all servos I used havn't had that problem, so I couldn't replicate the problem

bubbo on Apr 2, 2014 said:

Hi Joo,

thanks for your answer. In calibration-mode i adjusted the SERVOLEFT/RIGHTNULL values

so that they are in 90 degrees, like in the picture. Then this happens without the "3000-" trick (sorry, this terminology you get when a complete noob like me tries to build this thing)
wiping from bottom to top. Writing is from left to right, but it looks upside down (he puts the dots bottom one first) and the parking position is bottom right.
Then with the '3000-' trick:
wiping from top left to bottom, writing from right to left, but not upside down. parking position is top left.
so now i'm a bit confused

skifast42 on Apr 2, 2014 said:

Looking at the code to try and reverse out the kinematics: is L1 = arm attached to servo, L2 = arm from "elbow" to pen, L3 = ? (distance between servo pins?)

bubbo on Apr 4, 2014 said:

i think L3=from the joint where the arms come together to the center of the pen

Snip3r13 on Mar 29, 2014 said:

awesome can't wait till i make 1

fimus on Mar 28, 2014 said:

After waiting for 25 days for my servos to arrive from China, finally made one for myself! Thanks a lot joo!

whoDat on Mar 25, 2014 said:

I converted the code to C# for use with the Netduino...It prints, but everything is skewed pretty badly. Trying to figure out how things are supposed to be layed out so I can debug a bit better. Is the below correct?

Drawto(0,0) = top left
Drawto(50,0) = top right (by the eraser)
Drawto(50,50) = bottom right
Drawto(0,50) = bottom left

Also, during calibration, is it supposed to be drawing a diagonal line from top left to bottom right?

samwhite2 on Mar 18, 2014 said:

I'm stuck with ardinuo and getting it working. I have downloaded everything from github but has anyone done a turorial on it or can help please? The plotclock is made, i'm just stuck on the ardinuo software.

joo on Mar 19, 2014 said:

have you read the instructions tab or the comments in the arduino sketch? where are you stuck?

Puvilland on Mar 16, 2014 said:


No one made lasercut & 3D pieces on a selling kit ?

No laser cut machine and 3D printer here :-(

Peter (EuroZone)

sofiadragon1979 on Mar 14, 2014 said:

Is there anyway to set it up to be a 12hr clock instead of a 24hr one 'cause I don't like 24hr clocks I know it's in the programing but I don't know how

dTom on Mar 11, 2014 said:

HI Joo,

I just remix it to hold stylus pen on Note 2 to plots time(http://www.thingiverse.com/thi...,
But seems I did not do correctly Initial calibration,

According to your code comments,

1) adjust the "SERVOFAKTOR" until the servos move exactly 90 degrees,
need move like you last upload image?
I'm trying to adjust but it move more or less around 5 degrees (I will upload video tonight)
This will affect the text crooked yet?

2) Zero-position of left and right servo
What does it mean "Zero-position"?

3) origin points of left and right servo
I do need to adjust in order to calibrate

Thanks for your help and sorry for my English (thanks google translate)

joo on Mar 11, 2014 said:

Nice work with the capacitive touch pen :)
yes, it should move to the positions as seen in the last image. The zero-variable sets the initial angle, the servofaktor then defines how much "steps" the servo needs in order to turn 90°, you shouldn't need to change the origin points. In your video it looks like the servoholder is a bit loose, since there is much movement by the servomount, but nut by the pen.

Aivan on Mar 10, 2014 said:

Hello again, I managed to solve the problem! Was bad and also the USB cable adapter 9v, very weird because he used the USB cable to print: S and adapter worked well also! the point is to change cables and everything ok.

Thanks for your help and sorry for my English (thanks google translate)

cain666 on Mar 10, 2014 said:

this would be great with a push button to write the time.. that way the pen should last much longer

Monaro on Mar 11, 2014 said:

I have also thought of this idea however the time will be displayed wrong after the minute is up. Perhaps it could write the time when the button is pushed and then after 60sec it erases the time and waits for the next button push? It would be great if there was a feature that could be commented out in the arduino code that would enable this.

xenonion on Mar 6, 2014 said:


Once again, thank you for the help. I did do the intial calibration and it did draw the time, however it was upside down. Will this give me the figure eight on the x-axis? Why are the start and finish points slightly different? So your going 269 degrees and finishing at -91 degrees?

number(30, 35, 8, 1);

case 8:

drawTo(bx + 5 * scale, by + 10 * scale);
bogenUZS(bx * scale, by * scale, 10 * scale,4.7,-1.6, 1);
bogenGZS(bx + 20 * scale, by * scale, 10 * scale, -4.7, 2, 1);

joo on Mar 6, 2014 said:

i actually don't know the exact reason, but i think it had to do with the circles not closing because of the play in the hinges... it also could be that the functions are a bit off and faulty

xenonion on Mar 6, 2014 said:

Thank You for the help! What are the XY maximums? Are the angles in radians? Firstly, I should mention that the plot clock is actually working backwards, it does not draw as in your videos, but upside down. Secondly, I have been playing with the settings and the servos will travel full deflection off of the board if the values are too extreme.

This is very helpful.

joo on Mar 6, 2014 said:

angle is in radians, have you used the v1.01 with calibration routine? also if your servos are inverted there is a discussion down the comments about it, a quick fix seems to be the following:

change all

and change
writeMicroseconds(floor(((a2 + a1 - M_PI) * SERVOFAKTOR) + SERVOLEFTNULL));
writeMicroseconds(floor(((a1 - a2) * SERVOFAKTOR) + SERVORIGHTNULL));
writeMicroseconds(3000-floor(((a2 + a1 - M_PI) * SERVOFAKTOR) + SERVOLEFTNULL));
writeMicroseconds(3000-floor(((a1 - a2) * SERVOFAKTOR) + SERVORIGHTNULL));
to reverse the servos

xenonion on Mar 5, 2014 said:

Hello, How would I modify the code to draw a single figure 8 horizontally? Is this possible?

Thank You!

joo on Mar 6, 2014 said:

bogenUZS(float bx, float by, float radius, int start, int ende, float sqee)
to draw clockwise arcs (or circles) bx/by = center, radius = radius, start = starting angle, ende = ending angle, squee = sqish or flatten circle
bogenGZS is the counter clockwise version

Lemppa on Mar 4, 2014 said:

Amazing robot Joo great work! Had an idea from that robot. If i had time and the resources I would replace the marker with a stylus and and for the surface I would put an galaxy note where it could draw the time. Well it could even be used to automate other apps from the device for example Calculator, Angry Birds etc.

plainolddave on Feb 26, 2014 said:

Hi Joo - I've added a pull request on github to merge in a couple of small changes into the code:
- support for DS1307, DS1337 and DS3231 real time clock chips so plotclock tells the right time
- ability to calibrate servofaktor separately for left and right servos

For anyone interested:

- the github code is at https://github.com/Dave1001/pl... (hopefully will be merged into the next release by Joo)
- you can pick up DS1307 real time clock modules on ebay for under $2 incl postage
- instructions to connect the RTC to your arduino are here http://www.pjrc.com/teensy/td_...

joo on Feb 26, 2014 said:

already have a DS1304 module lying around, gonna test it later that week and then merge it, also will update the lasercut parts for a first revison

maxneu on Feb 26, 2014 said:

Would someone be kind enough to comment this code? I think I understand how it works but I dont get how it knows how to plot each number.

Navkram on Feb 25, 2014 said:

can someone video the start and then the cycle it goes through without editing to show home locations and the sequence it goes through, servo with arms is in the home position, I cannot seen to get the arm orientated correctly. It looks like to me that everything is reversed, writing in air (up) and working from right to left.

HarlanDMii on Feb 25, 2014 said:
Sembot on Feb 24, 2014 said:

Thank you to HalanDMii, everything works fine
See previous comments

Kind Regards

jamil1984 on Feb 24, 2014 said:

I also tried to copy and paste the code from the git hub, but when it is compiling, it says



'setTime' wasnot declared in this scope.

sketch_feb24a.ino: In function 'void setup()':

sketch_feb24a:66: error: 'setTime' was not declared in this scope


Any ideas?
Thanks in advance

jimmy_chch on Mar 1, 2014 said:

Hi, I am having the same problem, I have the time library imported (downloaded - imported the zip file) then I (i dowloaded the files from GIT and opened the sketch) yet when I go to verify it still gives the same error. Any Suggestions? Have I missed a step somewhere? Cheers

jamil1984 on Feb 24, 2014 said:

Ok i figured this one out, i just needed to download the time library :)

I copied and pasted the code from github, and it works, but the left and right motors just sweep back and forth with the lift motor up??

jamil1984 on Feb 24, 2014 said:


I have a question, i cannot seem to be able to open the .ino or arduino sketches?? does anyone have an answer? i just want to load it into the arduino.

Aivan on Feb 24, 2014 said:

Hello again, I have tested with a 9V charger router - 1A and servos only turn left continuously.

I have tried since revision 3 firmware with the same results, the servos turn right and do not stop, I have to stop it to prevent burning.

The connections seem fine :S

Anyway I recorded a video that you may see.

(it's in HD)


I'm sad :( I work them all and my no!

HarlanDMii on Feb 24, 2014 said:

I noticed that the LED's on the arduino are red... Are they red like that without the servos connected?

joo on Feb 24, 2014 said:

hm, have you changed the servo pins in your arduino sketch because you use 1 2 and 3 instead of 2 3 and 4? also i would recommend you to use the current version 1.01 of the program

yourSweater on Feb 23, 2014 said:

What were the dimensions of the piece which you laser cut (height and length)?

joo on Feb 23, 2014 said:

don't know exactly, but its a bit smaller than A5-paper, so on the typical A3 laser cutter you can cut four on the same sheet

Sembot on Feb 23, 2014 said:


I've read that you have quite a few elko in the supply line puts zodicht possible to the servo connections
I use 2x 470?F dietary offs (peak flows)

Aivan on Feb 23, 2014 said:

An excellent work!

I have a small problem, first excuse my English (thanks google translator).

I'm using:

Arduino UNO R3
Servos Hextronik hxt900 9g
USB Connection

The problem is that Arduino connects and disconnects the USB.

Arduino working properly, load firmware and running, but when I connect the servos are disconnected and reconnected the USB.

I've checked all connections and everything seems fine, I also tried to configure other data pins getting the same results even desperate've tried 3 different computers.

Any idea?
Anyone has this happened?
Can the problem be the servos?

I want to see the time on my plotclock: (

HarlanDMii on Feb 23, 2014 said:

I had the same problem.. Use a 6-12 volt adaptor to power the arduino.

joo on Feb 23, 2014 said:

i had this problem only when the servos needed too much force to move at all, say having a joint too tight or having a mechanical error where the pen is stuck. So first I would check if every joint and connection runs freely, if there still are problems try adding a big capacitor, or using a smartphone/tablet charger for the 5V supply (PC-USB only handles 500mA). Also try connecting the servohorns one at a time to see when the arduino starts resetting.

acklenx on Feb 21, 2014 said:

So inspiring I actually built one... but I had the same problems as Sembot. I wanted to ask for some info on the code. What are the max/min values? What do you mean by parallel (I don't think it's possible) with reguard to the arms? What do bigger/smaller numbers do? etc. I've been added comments to the code as I figure things out, but I'm still a ways off before it come close to working. I spent a fair bit of time tweaking the files to work with 5mm acrylic so I can use uv/black lights and wet erase markers. I'll follow up if I get it fix. And I'll follow up sooner if I don't ;)

Sembot on Feb 23, 2014 said:

Hai Acklenx,

May I ask if you've already found a solution to the problem of mirror movement
I still have not found what reason can be
The type of my servos = Micro Servo 9G ?????

Can anyone help with the calibrate

with kind regards

Sembot on Feb 21, 2014 said:


The movements of my plot clock are mirrored what can I do
Erasing from top left to bottom right
Writing from top right to bottom left
The elevator servo is up (writing in the air)
If he stops the pen stand top left, right servo arm outstretched
So everything is reversed (mirrored)
What can I do, can someone help me
I use pin 8,9 and 10 of the Arduino (got the pins 2,3,4 in the program changed)
Pin 8 is the lifting servo
Pin 9 is the right servo ( highest )
Pin 10 is the left servo with the double support

Kind regards

HarlanDMii on Feb 24, 2014 said:

Can't believe I made such a simple mistake.. I originally said 2000-
That should have been 3000-

HarlanDMii on Feb 24, 2014 said:

change all

and change
writeMicroseconds(floor(((a2 + a1 - M_PI) * SERVOFAKTOR) + SERVOLEFTNULL));
writeMicroseconds(floor(((a1 - a2) * SERVOFAKTOR) + SERVORIGHTNULL));
writeMicroseconds(2000-floor(((a2 + a1 - M_PI) * SERVOFAKTOR) + SERVOLEFTNULL));
writeMicroseconds(2000-floor(((a1 - a2) * SERVOFAKTOR) + SERVORIGHTNULL));
to reverse the servos

joo on Feb 21, 2014 said:

it seems your servos are inverted, you may try setting the servofaktor negative, say -620 instead of 620 and also play with the values of LIFT0 / 1 / 2

Huub1985 on Feb 21, 2014 said:

Where can I buy one?

TonyBoerner on Feb 20, 2014 said:

This thing is so cool and funny i can´t stop to laugh :-D
I love it!

jbones987 on Feb 20, 2014 said:

How do I download the .stl files for the plotclock?

KevinLDZ on Feb 19, 2014 said:

I am so exciting to make one today and it works good but still need to calibration.Lots of my friends in shenzhen want me to host a workshop.I would like to talk with you about my ideas.Would you share with me ur contacts?Thanks!

ohmybrain on Feb 19, 2014 said:

Excellent level of effort in creativity and execution. :)

Claghorn on Feb 18, 2014 said:

But the important question is: Does it keep printing and erasing 00:00 when you haven't set the time after a power failure? :-).

Anonymous on Feb 18, 2014 said:

Man - this is the coolest thing I have seen on here is a while - what a delightful little thing, :)

Sembot on Feb 18, 2014 said:

Hai datasmasher
I use the time.h of http://playground.arduino.cc/C...

kingpop on Feb 18, 2014 said:

Incredible project! Admittedly, I am a complete noob when it comes to arduino, but this inspires me to give it a try. Can you give me further detail on what you listed in your instructions: "A small custom servo adapter, there are shields or servo-arduinos that also can be used". I think I'm pretty clear on all the other parts, but not sure what exactly this is. Thanks!

nkizz on Feb 18, 2014 said:

Something similar to this: http://www.adafruit.com/produc...
although you don't need as many channels only one per servo I think.

ndsh on Feb 17, 2014 said:

what a great example for object-oriented ontology! it's so darn cute.

Makermartl on Feb 17, 2014 said:

Das hätte Karl Valentin noch erleben sollen!

foxpup on Feb 17, 2014 said:

One might be able to "write" on glow in the dark painted surfaces with a
blue laser too. No need to clean that. It would take some very good
paint with a nice slow half life. The light would have to be blue or
possibly green. Red is too low energy to excite glow in the dark
paint. UV lasers or focused LED's would be best. :-) The machine could repeat the pattern over and over within each minute to keep the image refreshed. Enough of my rambling. Very cool creation as it is right now. :-)

datasmasher on Feb 17, 2014 said:

Which time.h library did you use?

edsonmedina on Feb 17, 2014 said:

This could easily become a milling machine.

Sembot on Feb 16, 2014 said:

This is a great project, I have all the parts printed in PLA with my Prusa Mentel 3D robot and everything was perfect
I am confused how to place before the start of the arms from the servos
Is the starting position right above??
Anyway, I am happy with this project

Thalmano on Feb 16, 2014 said:

Hey my friend, you are really mad :D THIS THING IS AWSOME! ! ! I have great respect for you! Greets from Bremen

3daybreaker on Feb 16, 2014 said:

Great fun project.
This will be my son's first arduino project on the board I geve him. I will start printing the parts for him :-)

He already proposed to build one additional one... next to it..... writing the date :-)
And a third writing names of people having birthday that day :-)


knoxwill on Feb 16, 2014 said:

Dude! This is so cool!

Ecogeeco on Feb 16, 2014 said:

I converted the whole thing to .stl files and i am printing it now. Now i just need to order the servos and the Arduino. This is a GREAT little project! Thanks for sharing it!

greengiant83 on Feb 15, 2014 said:

Someone needs to add a head above the servos so it looks like its a little guy drawing the time holding onto the market with two hands

Ecogeeco on Feb 16, 2014 said:

I was thinking the same thing and i am already working on it :)

aaronR on Feb 15, 2014 said:

are this the right ones:

joo on Feb 15, 2014 said:

should be the right ones, tower pro 9g, mine were about 16€ for 8 servos from china

foxpup on Feb 15, 2014 said:

Nicely done. The world is filled with people who are inclined to tell you what to do, but I just can't help myself in this case. With this setup I'd want to see it running on and on and on... , but the pen will get used up and I presume the eraser part will get saturated. If anyone out there has the time, it would be great to modify this design to draw around in tiny sandbox. You'd never use up the sand and it would still be just as cool. It would then be practical to leave running 24/7 for everyone's enjoyment. That just my 2 cents worth. (or should i have said microBTC ?)

Further ideas: If the sandbox had a vibrator attached, the writings could just fade away. If there were 2 different densities of "sand" they would automatically form layers and if they are different colors, the drawing would be more pronounced. (airsoft bb's?) I do it myself If I wasn't so busy. :-) I may do it anyway, but I challenge anyone to beat me to it. :-)

beefinator on Feb 16, 2014 said:

ohhh, that's a good idea. I'd try it if I didn't already have plans for projects. :) go for it

aaronR on Feb 16, 2014 said:

or you could us a litle brush i replace of the gum for the sand :)

MoonCactus on Feb 16, 2014 said:

Was just thinking about sand also! Though the original idea is still marvelous :)

laird on Feb 15, 2014 said:

Or perhaps draw using water on Zen Board (http://blog.freepeople.com/201... or http://www.buddhaboard.com/)? If you could make a marker from some felt and tubing, you could draw with water "forever". I guess you'd have to refill it over time. So then your Aduino could be relaxed and meditate on the nature of time for you!

Kristofer_Eonor on Feb 15, 2014 said:

Awesome :D

soupaboy on Feb 15, 2014 said:

could i use the raspberry pi?

jkrassman on Feb 15, 2014 said:

Thats was a really cool project! I just love it!

corben33 on Feb 15, 2014 said:

I had some extra time so I broke down the SketchUp file and created the STL files. They are located here http://www.thingiverse.com/thi... as a remix.

XYZWorkshop on Feb 15, 2014 said:

Holy COW!!! I've seen amazing 3D printed stuff.. and this has gone to the top of my list! AMAZING.. gonna try an make one

corben33 on Feb 15, 2014 said:

Is there any way you could post all of the parts as STL files? I would really like to make this for my High School programming class. Great work by the way, super cool!

Ecogeeco on Feb 16, 2014 said:

you can export this as an .obj from sketchup http://www.sketchup.com/ and most 3D printers like the Replicator can use that file type

RonGinger on Feb 14, 2014 said:

I really like this and want to build one. It will go nice beside my useless machine. But I dont have sketchup and cannot afford it- Im a retired guy so I cant get the student version. Can you post the parts files as dfx? I could them cut the parts on my CNC router.

Riddellikins on Feb 15, 2014 said:

I believe that sketchup make is available for non-commercial use. You can go to this link and download it for "Personal Projects".


ekaggrat on Feb 14, 2014 said:

i had done this 2 years ago..... http://hackaday.com/?s=doodle+...

MoonCactus on Feb 16, 2014 said:

More shaky but I like it even better, esp the way it wipes the number and counts the seconds (a human-like wrist movement). Would you re-make it specifically for 3D printing? thumbs up!

AbuMaia on Feb 14, 2014 said:

Good for you. Now someone has done it again.

snug on Feb 14, 2014 said:

Klasse. tolles Projekt !!!
Alle Daumen hoch vom Hackerspace Bremen. ;-)

bre on Feb 14, 2014 said:

I gave a talk today at the NY 3D Print Show and as part of it showed some of the cool things that have been uploaded to Thingiverse recently. The plotclock was the hit of the show. Congrats on a fantastic project.

MoonCactus on Feb 16, 2014 said:

You bet! But please tell me you gave the author proper credit! http://creativecommons.org/lic... ;-)

joo on Feb 14, 2014 said:

Thanks a lot!

themitch22 on Feb 13, 2014 said:

That's a clever design! I would like to make a derivative for an analog wall clock.

CaptainObvious on Feb 13, 2014 said:

Brilliant! =D

rbrodie on Feb 13, 2014 said:

Very Very Cool ... Thanks for sharing! Went to the top of my list of things to make.

fantasygraph on Feb 13, 2014 said:

Amazing! !

joo on Feb 13, 2014 said:

it's the same AVR, so it shouldn't be a problem

MakerBlock on Feb 12, 2014 said:

THIS IS SO BEAUTIFUL I COULD CRY!!!! I must make one immediately!

bubbo on Apr 1, 2014 said:

first of all: great design!
So now i made one myself, but also with mine it's writing backwards and the parking is top left instead of topright.
Now in tried the '3000-' trick, but that doesn't seem to solve the problem. Is there maybe something else i can try? Perhaps switch pin 3 and 4?
hope you can help me out, because i would love this thing to work.