PC817 Optocoupler Isolation Board 3.6-30V

The PC817 optocoupler isolation board lets a low-voltage microcontroller like Arduino, ESP32, or Raspberry Pi safely control or monitor higher-voltage circuits without any direct electrical connection between the two sides. Each channel uses its own independent PC817 optocoupler, so a 3.3V or 5V control signal on the input side can switch or sense a completely separate 3.6-30V circuit on the output side, with true galvanic isolation protecting your controller from voltage spikes, ground loops, and electrical noise.

Every channel operates fully independently, meaning each one can handle a different input signal and a different output voltage at the same time, making this board flexible enough for mixed-voltage projects. A jumper cap on each channel lets you configure the output as active-high or active-low to match your control logic, and onboard LED indicators give instant visual feedback when a channel is active, which makes debugging and wiring verification much faster. Keep in mind the PC817’s output current is limited to around 10-50mA depending on the specific chip batch, so driving high-power loads like motors or large relays still requires an external transistor or driver stage rather than a direct connection.

This module is a practical choice for industrial automation, PLC signal conversion, sensor interfacing, relay and MOSFET driving, and any project where noisy or high-voltage circuits need to be safely decoupled from sensitive control electronics. It’s designed for DC or low-frequency pulse signals up to about 4kHz.

Specification:

• Optocoupler Type : PC817 (Per Channel, Independent)
• Drive Signal Voltage : 3.6V – 24V DC
• Output Voltage Range : 3.6V – 30V DC
• Output Current : Up to 10mA (Max, Varies by Load)
• Output Logic : Configurable via Jumper (High/Low)
• Signal Frequency : DC or ≤4kHz Pulse
• Indicators : Onboard LED per Channel
• Operating Temperature : -40°C to 85°C