Astro focuser (compatible with myFocuser Pro2 DIY)

Astro focuser with small stepper motor 28BYJ-48 or MP35EA

Focuser is compatible for my EAF holder: (as ZWO EAF replacement)

• SCT
• Newton
• Samyang 135mm ED
• TS 76EDPH (Sharpstar)

Wiring diagram and PCB 1.0 on EasyEDA

Wiring diagram for smdPCB on EasyEDA

Wiring diagram for FHC on EasyEDA

Demo video

My firmware is on Github base on OnFocus driver by Howard Dutton project

OnFocus ASCOM driver is here , driver for INDI Ekos (StellarMater or Astroberry) available too.

Alternative firmware:

Can by use popular alternative firmwareArduino ASCOM Focuser Pro2 DIY by Robert Brown project

• Download current firmware myFP2_ULN2003_xxx.zip
• Modify this files:

--- myBoards.h- ---

#define IN1ULN 13 // 4 #define IN2ULN 12 // 5 #define IN3ULN 11 // 6 #define IN4ULN 10 // 7

--- myDefines.h ---

#define INLED 9 // A1 // in and out leds #define OUTLED 9 // A2 #define BUZZERPIN 4 // A3 // buzzer #define BTRX A5 // 11 // (Optional for BT) // bluetooth adapter HC05 #define BTTX A4 // 10 // (Optional for BT) #define TEMPPIN 2 // 2 // temperature probe on pin 2, use 4.7k pullup

#define ENCODERSWPIN 3 // 11 // rotary encoder push sw on pin 11 #define ROTENCPIN9 6 // 9 // rotary encoder is connected to pins 9 and 10 #define ROTENCPIN10 5 // 10

--- focuserconfig.h ---

#define DRVBRD ULN2003 #define BUZZER 1 // Buzer #define INOUTLEDS 1 // Statue Led #define ROTARYENCODER 1 #define BLUETOOTH 1 // Optonal for BT on Aux port #define TEMPERATUREPROBE 1 // Optonal for Temperature sensor on Aux port

....

#if defined(ROTARYENCODER) //#if defined(BLUETOOTH) //#halt // ERROR you cannot use a rotary encoder and bluetooth at the same time //#endif

AUX RJ45 pinmap for Focuser Pro2 DIY

1 - D6 ROTENCPIN9

2 - D5 ROTENCPIN10

3 - D3 DS18B20 ENCODERSWPIN

4 - D2 DS18B20 OneWire (Orange) - Temperature

5 - GND and DS18B20 GND (Black) - Temperature

6 - VCC For FHC J1 set to 5V (smdPCB ) or PCB 1.0 fix look attached picture

7- A4 BTTX

8- A5 BTRX

UPDATE

• 2020-01-10 Add support for MP35EA motor
• 2021-11-21 Add smdPCB version
• 2021-11-27 Add support for Arduino ASCOM Focuser Pro2 DIY
• 2022-04-08 Add FHC