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Table of Contents
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 | Parts | Mouser | Reichelt | Conrad | Other | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 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.