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wcore_res-sd

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RES-SD module

This is a very simple board performing three functions:

  • SD card socket
  • Reset button
  • Indicator LEDs

Schematic

Connector J16E (SMT male header) carries 3v3 power and data signals for the SD card, along with the Reset and “LED” signals.

The Reset button has a damping capacitor.

The LEDs are connected through limiting resistors. The cathode pins are closest to the edge of the board.


BOM v1.0 **place holder**

Type Qty Value Package PartsMouserReicheltConradOtherNotes
Resistors
2 220R 5% THT R7A, R8A
2 220R 5% 1206 R7B, R8B
1 330R 5% THT R102
4 1k 5% 1206 R7B1-4
2 1k 5% THT R11, R13
1 10k 5% THT R12
1 220k 5% THT R101
Pots
2 10k 6*5mm vert P1, P2
Capacitors
3 100n 1206 C1A, C1B, C2
Diodes
1 1N4148 THT as marked
Transistors
1 BC337 TO-92 T1
ICs
2 74HCT125 SOIC IC1A, IC1B 595-SN74HCT125DR Ensure HCT
1 74HC595 SOIC IC2
Headers
2 1*2 male
1 1*3 male
1 1*5 male J1 or wire directly
9 2*5 male
3 2*8 male
2 2*25 female
Hardware
4 M3 spacer 8mm(?)
MCU breakout
1 Waveshare Core 407v

Versions

v1.0: first release. Important! v1.0 boards have an error with the Reset switch. All boards should have one trace cut (shown in white), but it is required to bridge a pin with the adjacent mounting pin (as circled in red)

Assembly

The following build order is suggested:


License

Currently the design is © 2017 antilog devices with all rights reserved; all documentation is CC BY-NC-SA 3.0.

wcore_res-sd.1504765812.txt.gz · Last modified: 2017/09/07 06:30 by latigid_on