License

GPL 3.0

Tags
OnStep
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OnStepMiniPCB

3 years ago 6553
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

For my OnStep telescope mount controller (visit my group for more information.) This design is built around the Teensy3.2 and supports the most important features while keeping a small size. There are two stepper drivers (one for RA/Azm and one for Dec/Alt.) There's a power jack, fuse, and power switch connection. Additionally, there's a limit sense input (to stop the mount,) and a PEC sensor input. For connectivity there's a USB Port and one other device supported. That device can be a Bluetooth adapter (Bluetooth Mate Silver or HC05,) or an ESP8266/ESP-01 for WiFi. There's also a modular connector for an ST4 guider interface (with optional 5V power.) This strives for drop-in compatibility with my prior OnStep Mini versions so the 3D printed case/panels should still work.

Documents

Schematic

PCB

BOM

ID Name Designator Footprint Quantity
1 A4988, etc. U3,U2 GENERIC STEPPER MOTOR DRIVER CARRIER 2
2 POWER_JACKPTH JP1 POWER_JACK_PTH 1
3 FUSE F1 FUSEHOLDER_MINI_BLADE 1
4 MOLEX KK 1X2 J1 MOLEX KK 1X2 1
5 5V Reg U4 OKI78SR5/1.5W36C HOR 1
6 100uF C6,C7 CAP-D8.0XF3.5 2
7 5555165-1 RJS 6P6C 1
8 RED5mm D1,D2,D3 LED-5MM 3
9 0.33UF-50V-20%(PTH) C5 CAP-PTH-SMALL-KIT 1
10 1x2 Header J6 HDR1X2 1
11 TEENSY_3.2_BASIC U1 TEENSY_3.2_BASIC 1
12 3.3KΩ(3302) R2,R3 AXIAL-0.3 2
13 4.7KΩ R1 AXIAL-0.3 1
14 WEMOS D1 MINI U8 WEMOS_D1_MINI 1
15 1N4001 D5 DO-41 1
16 Bussed Resistor Network 5 Pin RP1 4 RESISTOR ARRAY 1
17 PJ-325M/3.5MM J3 AUDIO-PJ325 1
18 4POS_SCREW_TERMINAL_3.5MM JS1,JS2 4POS_SCREW_TERMINAL_3.5MM 2
19 0.1UF-100V-20%(PTH) C3,C1,C9,C8,C10 CAP-PTH-SMALL-KIT 5
20 47uF C4,C2 CAP-D5.0XF2.0 2
21 SJ-3566/3.5MM J2 CUI SJ-3566 1
22 2k R4 AXIAL-0.3 1
23 5555164-1 RJ1,RJ2 5555164-1 2

Attachments

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Members

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