This is a much smaller design of the Smart Hand Controller (SHC) for OnStep*1. It is based on the OnStep ESP32 Smart Hand Controller circuit.

Therefore, the firmware is exactly the same as the ESP32 SHC, see the section Installing the Platform - For the ESP32 SHC on The Smart Hand Controller (SHC) page.

*1: OnStep is an open source GoTo motor drive for telescope mounts

• DOIT ESP32 DEVKIT V1
  • Note: Unlike the original ESP32 SHC, this design uses the DOIT ESP32 DEVKIT V1 with 30 pins.
• PCB ( refer to kicad directory )
• 0.96" SSD1306 OLED Module
  • Note: Stick tape on the back side for insulation.
• Modular Jack 6P6C x 2
  • The plastic pins for fixing the jacks should be cut out.
• 7 Resistor Network (2K ohm)
• 4 Resistor Network (2K ohm)
• 2.54mm Header Pins 15pin F x 2, 4pin M, 2pin M
• Momentary Tact Button Switches 0.2" x 0.24" x 7
  • Buttons would need to be at least 0.24" long.
• Case ( refer to miniSHCcase.stl )
  • The example on this page were produced using the MSLA LCD 3d printer.

Tape is attached to the back of the OLED module for insulation. | - | - | | ---- | ---- | | | | |
To avoid interference with the OLED, the leads protruding from the through-holes are trimmed. |
Attach a pad to the lid to hold the board in place and close the lid. (In this picture, the lid is fastened with tape.) |

This is licensed under the TAPR Open Hardware License, one of the well-known open-source hardware licenses.