1-Channel Relay Module With Optocoupler Low Level Trigger for Arduino one channel
The module complies with international safety standards, the control area and the load region isolation trench.
With the power supply and relay instructions, pull off, disconnect does not sh..
The delay module for New Digital LED countdown display, with 5V relay;
Product delay time can be set via the remote control on your own fist, set up, on the next power-up after the countdown display and work in accordance with the target value;
Product for precision delay prod..