Single Channel Relay Board Module 5V for Arduino

Trigger mode:
High level 5V relay module Can be used for micro controller development board module or home appliance control – 12V TTL control signal Can control DC or AC signal, also 220V AC load Normally open / closed contact Controlled lights bright when pull and not shine when disconnect Increase the transistor drive relay coils, control pins high impedance Control pins have pull down circuit to prevent malfunction of relay vacant