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GPL 3.0

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MaxPCB2

7 months ago 1828
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Description

For my OnStep telescope mount controller (visit my group for more information.) This design is built around the Teensy3.5/3.6 There are four stepper drivers (one for RA/Azm, one for Dec/Alt, one for a focuser, and one for a rotator/second focuser.) All are available on RJ jacks at the PCB back. There's a power jack, fuse, and power switch connection. There are several connectivity options: USB, an I2C port (w/footprint for the DS3231 RTC.) There are two serial ports. Serial4 is brought out on a pin-header connector (w/power.) Serial1 is on a WeMos D1 Mini (ESP8266) foot-print for Wifi support. There is a D-Sub connector DB9 that has home SW inputs, PEC input, and two channels of A/B encoder inputs (which run to the ESP8266.) There's also a modular connector for an ST4 guider interface (with optional 5V power.) One a 3.5mm stereo mini jack is a limit sense input (to stop the mount) and also a reticule LED output. And finally, there's a mini speaker output for an alert buzzer. Connections for

History Version 2.0 First release of MaxPCB2 Version 2.1 Moved PPS from DS3231 on 32KHZ to SQW pin

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PCB

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted BOM_Manufacturer Part BOM_Supplier BOM_Manufacturer BOM_Supplier Part
1 A4988, etc. U4,U3,U2,U5 GENERIC STEPPER MOTOR DRIVER CARRIER 4 Misc. eBay etc.
2 POWER_JACKPTH JP1 POWER_JACK_PTH 1 PJ-102AH Mouser CUI Inc. 490-PJ-102AH
3 FUSE F1 FUSEHOLDER_MINI_BLADE 1 3568 Mouser Keystone 534-3568
4 5V Reg U7 OKI78SR 1 OKI-78SR-5 1.5-W36-C Mouser Murata 580-OKI78SR5/1.5W36C
5 100uF C2,C1 CAP-D8.0XF3.5 2 EEU-FR1H101 Mouser Panasonic 667-EEU-FR1H101
6 100uF C3 CAP-D6.3XF2.5 1 UVY1E101MDD Mouser Nichicon 647-UVY1E101MDD
7 RJ12 RJS 6P6C 1 5520470-3 Mouser TE Connectivity 5520470-3
8 0.33UF-50V C8 CAP-PTH-SMALL-KIT 1 C322C334M5U5TA7301 Mouser KEMET 80-C322C334M5U-TR
9 0.1UF-100V C9,C11,C13,C12,C6,C7 CAP-PTH-SMALL-KIT 6 SR211C104KARTR1 Mouser 581-SR211C104KARTR1
10 1x2 Header J12 HDR1X2 1 0.1" Breakaway Pin Header Misc. 0.1" Breakaway Pin Header
11 12V Reg U6 OKI78SR 1 L7812ABV Mouser STMicroelectronics 511-L7812ABV
12 WEMOS D1 MINI U8 WEMOS_D1_MINI 1 Misc. eBay etc.
13 Bussed Resistor Network 5 Pin RP1,RP2 4 RESISTOR ARRAY 2 4605X-101-202LF Mouser Bournes 652-4605X-1LF-2K
14 1x3 Header J10,J9 1X3 HEADER 2 2 0.1" Breakaway Pin Header Misc. 0.1" Breakaway Pin Header
15 1N4001 D5,D4 DO-41 2 1N4001 LCSC Generic 1N4001
16 DB9 Socket JP2 DB9 1 D09S33E4GV00LF Mouser Amphenol FCI 649-D09S33E4GV00LF
17 BUZZER SP1 BUZZER-12MM-KIT 1 CEM-1203 Mouser CUI Inc. 490-CEM-1203(42)
18 4.7KΩ R1 AXIAL-0.3 1 4.7K Ohm 0.1 Watt Generic 4.7K Ohm 0.1 Watt
19 3.3KΩ(3302) R2,R3 AXIAL-0.3 2 3.3K Ohm 0.1 Watt Generic 3.3K Ohm 0.1 Watt
20 180Ω R5 AXIAL-0.4 1 180 Ohm 1/4 watt Generic 180 Ohm 1/4 watt
21 DS3231-RTC RTC1 DS3231-RTC-24C32-EEPROM 1 Misc. eBay etc.
22 5520426-4 RJ2,RJ1 5520426-4 2 5520426-4 Mouser TE Connectivity 5520426-4
23 RJ22 RJ3,RJ4 5555980-1 2 5555980-1 Mouser Te Connectivity 571-5555980-1
24 M0 J3,J6 1X3 HEADER 2 2 0.1" Breakaway Pin Header Misc. 0.1" Breakaway Pin Header
25 M1 J4,J7 1X3 HEADER 2 2 0.1" Breakaway Pin Header Misc. 0.1" Breakaway Pin Header
26 M2 J5,J8 1X3 HEADER 2 2 0.1" Breakaway Pin Header Misc. 0.1" Breakaway Pin Header
27 47uF C5,C4 CAP-D5.0XF2.0 2 ECA-1VM470I Mouser Panasonic 667-ECA-1VM470I
28 4POS_SCREW_TERMINAL_3.5MM JS1,JS2 4POS_SCREW_TERMINAL_3.5MM 2 1776275-4 Mouser 1776275-4
29 4POS_SCREW_TERMINAL_2.54MM JS3,JS4 4POS_SCREW_TERMINAL_2.54MM 2 282834-4 Mouser TE Connectivity 571-282834-4
30 TEENSY_3.5_3.6_BASIC U1 TEENSY_3.53.6_BASIC 1 PJRC
31 MOLEX KK 1X2 J1 MOLEX KK 1X2 1 22-23-2021 Mouser Molex 538-22-23-2021
32 1x5 Header J13 1X5 HEADER 1 0.1" Breakaway Pin Header 0.1" Breakaway Pin Header
33 LED3/5mm D1,D2,D3 LED3/5MM 3 3mm LED Red Generic 3mm LED Red
34 PJ-325M/3.5MM J2 AUDIO-PJ325 1 SJ1-3533NG Mouser CUI Inc. SJ1-3533NG
35 0.1UF-100V-20%(PTH) C14 CAP-PTH-SMALL-KIT 1 SR211C104KARTR1 Mouser 581-SR211C104KARTR1
36 2k R6 AXIAL-0.3 1 2K Ohm 0.1 Watt Generic 2K Ohm 0.1 Watt

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