nyan:boxes
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| nyan:boxes [2024/07/27 20:42] – created river | nyan:boxes [2025/02/12 03:10] (current) – river | ||
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| Notes on Nyan prototype / development boxes I have built. | Notes on Nyan prototype / development boxes I have built. | ||
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| + | The NMEA 2000 connector wires have the wrong colours. I have used the correct colours of ferrules to mark them, according to the colours tabulated in [[: | ||
| ===== 0 ===== | ===== 0 ===== | ||
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| 1000uF 50V caps: One on power input before anything, and one on the buck input. A ferrite with three windings of ground, input, and 5V sense line that goes to the INA3221 board are between them. | 1000uF 50V caps: One on power input before anything, and one on the buck input. A ferrite with three windings of ground, input, and 5V sense line that goes to the INA3221 board are between them. | ||
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| + | JTAG enable pin now connected to pi GPIO 4 via resistor. | ||
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| + | 470uF added to pi 5V header, and also to Heltec Vext pin. | ||
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| + | ==== Wiring ==== | ||
| + | |||
| + | < | ||
| + | 3 pin cable: | ||
| + | orange GPIO6 UART_TX | ||
| + | yellow GPIO7 UART_RX | ||
| + | Purple GPIO15 Lightning IRQ | ||
| + | |||
| + | Single Blue: Reset | ||
| + | |||
| + | 4 pin cable: | ||
| + | Green GPIO48 SDA | ||
| + | Blue GPIO47 SCL | ||
| + | Purple | ||
| + | White 3V3 | ||
| + | |||
| + | Single Black: JTAG select (GPIO3) | ||
| + | </ | ||
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| + | ===== 1 ===== | ||
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| + | Metal box | ||
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| + | Pico W, Waveshare CAN and LoRa. Small 24V in to USB switcher. | ||
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| + | Uses about 60mA from 12V (0.72W), running Nyan meshtastic. | ||
nyan/boxes.1722112952.txt.gz · Last modified: 2024/07/27 20:42 by river