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Synscan Telescope external Bluetooth Interface

by clifton2, published

Synscan Telescope external Bluetooth Interface by clifton2 Nov 6, 2016
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766Views 86Downloads Found in Electronics

Summary

External bluetooth controller for the Synscan hand controller.
Allows remote connection via the handset serial port to read the position of the scope and to slew it to objects in programs like stellarium.

Only 3 modules inside all available from Gearbest, no programming (except if you need to reprogram the name and baud rate of the BT module). One spare ST4 cable required as it has the full six wires for powering the modules from the handset and will require one end to be cut off.
Total project cost under 10 UKP which is way cheaper than the commercial versions.

Parts:
ST4 cable
HC-05 Bluetooth module http://www.gearbest.com/other-accessories/pp_227678.html?wid=21
Power convertor module http://www.gearbest.com/development-boards/pp_51010.html?wid=21
RS232 to TTL convertor http://www.gearbest.com/development-boards/pp_139898.html?wid=21

There are other RS232 convertor module available which are smaller, I only used this as it was the only one I had. I didn't use the RS232 connector because the serial cable that comes with the sysncan has not power available. Using the ST4 cable means 12V is available for the module, Cut off one end of the cable and pull back the insulation
PIN 1 - White is +12V
PIN 2 - BLACK is the RS232 Receive line
PIN 3 - RED not used so cut it back
PIN 4 - GREEN is GROUND.
PIN 5 - YELLOW is the RS232 Transmit line
PIN 6 - BLUE is not used so cut it back

WARNING: I accept no liability for any damaged caused by incorrect data, wiring, setup, voltage settings. This project is entirely at your own risk.
DEFINITELY MAKE SURE to set the power convertor to 3.3V output BEFORE connecting to anything else.

Instructions for setting up the name and UART settings for a HC-05 can be found online, UART default should be 9600,n,8,1 which will work on the Synscan.

Once connected with a PC by Bluetooth the Synscan port will be available to set up a new telescope with.

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