WSAL19075 – 3-CH Relay for Jetson Nano/en
Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.
Summary
The Waveshare 3-channel relay expansion connects three relays to the Jetson Nano via a standard 40-pin GPIO header. Optocoupler isolation separates the high-voltage side, and jumpers/LEDs indicate channel status.
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Technical overview
- Standard 40-pin GPIO header for direct stacking onto the Jetson Nano.
- Each relay is rated for up to 5 A at 250 V AC or 5 A at 30 V DC.
- Optocoupler isolation prevents interference from the high-voltage circuit.
- Onboard indicators show each relay’s operating status.
- Relay control pins are selectable with jumpers (e.g., P21/P16 for CH1).
- An acrylic bottom panel isolates the Jetson Nano from the expansion board.
Commands and examples – verify before use:
sudo apt-get install p7zip
wget https://files.waveshare.com/wiki/3-CH%20Relay%20for%20Jetson%20Nano/3-CH_Realy_for_jetsonnano.7z
7zr x 3-CH_Realy_for_jetsonnano.7z -r -o./3-CH_Realy_for_jetsonnano
cd 3-CH_Realy_for_jetsonnano/
sudo python test.py
sudo apt install python3-pip
sudo pip3 install bottle
cd python-bottle
sudo python3 main.py
Notes and version constraints
- Exact jumper assignments depend on the hardware revision; verify against the board before testing.
- The web control interface requires a reachable Jetson Nano IP; determine the address within your local network.
- Downloading the demo file requires an active internet connection during setup.
- Maximum load per relay is limited to 5 A – higher currents can damage components.
Source and revision record
- 3-CH Relay for Jetson Nano - Waveshare Wiki
- Source revision: 98512
- Captured: 2026-09-01T03:55:31+00:00
- SHA-256:
8a26fc24b7be74315854bfcf4cec3444f625810224221efd2c78b59fd4ac4966