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GPL 3.0

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MaxESP1.x (obsolete)

2 years ago 879
  • Description
  • Documents
  • BOM
  • Attachments
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Description

For my OnStep telescope mount controller (visit my group for more information.) This design is built around the ESP32S.

Features:

  • Three stepper drivers (one for RA/Azm, one for Dec/Alt, and one for a focuser or rotator.)
  • Power jack, fuse, and power switch connection.
  • DB9 (d-sub miniature) jack for quick connection of optional optical encoders, home position switches, and the PEC sensor.
  • Limit Sense input to stop the mount (panic button, switches on the mount, etc.)
  • Mini speaker for an alert buzzer.

Connectivity options:

  • USB
  • Bluetooth (onboard the ESP32.)
  • Wifi support via the WeMos D1 Mini (ESP8266) which can plug directly into the PCB (using 0.1" socket headers.) Encoders are supported through the WeMos D1 Mini and brought out on the DB9 connector.
  • I2C support so the DS3231 (RTC) and BME280 (weather) which can plug directly in the PCB.
  • ST4 port auto-guider interface (with optional 5V power.)

Documents

Schematic

PCB

BOM

ID Name Designator Footprint Quantity Manufacturer Part Mounted
1 A4988, etc. U3,U2,U4 GENERIC STEPPER MOTOR DRIVER CARRIER 3 ? Yes
2 MOLEX KK 1X4 J3,J4 MOLEX KK 1X4 2 22-23-2041 Yes
3 RJ22 RJ1 4P4C 1 5555980-1 Yes
4 POWER_JACKPTH JP1 POWER_JACK_PTH 1 PJ-102AH Yes
5 FUSE F1 FUSEHOLDER_MINI_BLADE 1 3568 Yes
6 MOLEX KK 1X2 J1,J5,J2,J10 MOLEX KK 1X2 4 22-23-2021 Yes
7 5V Reg U7 OKI78SR 1 OKI-78SR-5 1.5-W36-C Yes
8 100uF C1,C2 CAP-D8.0XF3.5 2 EEU-FR1H101 Yes
9 100uF C3 CAP-D6.3XF2.5 1 UVY1E101MDD Yes
10 47uF C4,C5 CAP-D5.0XF2.0 2 ECA-1VM470I Yes
11 RJ12 RJ3 6P6C 1 UL6661 Yes
12 USB B Female USB1 USB-M-49 1 61729-0010BLF Yes
13 0.1UF-100V-20%(PTH) C6,C7,C9 CAP-PTH-SMALL-KIT 3 SR211C104KARTR1 Yes
14 1x2 Header J15,J7 HDR1X2 2 0.1" Breakaway Pin Header Yes
15 1x6 Header J16 1X6 HEADER 2 1 0.1" Breakaway Pin Header Yes
16 RED5mm D1,D2,D3 LED-5MM 3 5mm Red LED Yes
17 0.33UF-50V-20%(PTH) C8 CAP-PTH-SMALL-KIT 1 C322C334M5U5TA7301 Yes
18 10KΩ R1 AXIAL-0.3 1 MFR0W8F1002A50 Yes
19 8.2KΩ R2,R3 AXIAL-0.3 2 MFR0W8F8201A50 Yes
20 12V Reg U6 OKI78SR 1 L7812ABV Yes
21 WEMOS D1 MINI U8 WEMOS_D1_MINI 1 ? Yes
22 4 Resistor Array RP1,RP2 4 RESISTOR ARRAY 2 4605X-101-202LF Yes
23 1x3 Header J24,J8 1X3 HEADER 2 2 0.1" Breakaway Pin Header Yes
24 1N4001 D5 DO-41 1 1N4001 Yes
25 A1 M0 J37 1X3 HEADER 2 1 0.1" Breakaway Pin Header Yes
26 A1 M1 J36 1X3 HEADER 2 1 0.1" Breakaway Pin Header Yes
27 A1 M2 J35 1X3 HEADER 2 1 0.1" Breakaway Pin Header Yes
28 A2 M0 J33 1X3 HEADER 2 1 0.1" Breakaway Pin Header Yes
29 A2 M1 J32 1X3 HEADER 2 1 0.1" Breakaway Pin Header Yes
30 A2 M2 J31 1X3 HEADER 2 1 0.1" Breakaway Pin Header Yes
31 470Ω R5 AXIAL-0.4 1 CFR0W4J0471A50 Yes
32 1x3 Header J20 1X3 HEADER 3 1 0.1" Breakaway Pin Header Yes
33 Nodemcu_esp32 U1 NODEMCU-ESP32S 1 Nodemcu esp32 Yes
34 0.1UF-100V C11,C10,C13,C12 CAP-PTH-SMALL-KIT 4 SR211C104KARTR1 Yes
35 1x5 Header J23 1X5 HEADER 1 0.1" Pin or Socket Header Yes
36 1x4 Header J22 1X4 HEADER 1 0.1" Pin or Socket Header Yes
37 2.2KΩ R4 AXIAL-0.3 1 MFR0W8F2201A50 Yes
38 MOLEX KK 1X5 J9 MOLEX KK 1X5 1 22-23-2051 Yes
39 DS1034-01-09MBN044(iron) JP2 DB9 1 DS1034-01-09MBN044(iron) Yes
40 BUZZER SP1 BUZZER-12MM-KIT 1 ? Yes

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