Description Control: Based on MCU N76E003 controlled relay board, relay active on and off intermittently Can set 0~999 seconds (16-17 minutes) after to turn on relay. (also can program to 999 minutes or maybe hours in more complex level) Also can set 0~999 after to turn off relay or hold on relay. One extra input signal, can use to control board by programming. fully isolated by optical coupler In current demo code, will work as “emergency button”, when send signal will hold current loop to stop. Can also connect to board ground, to eliminate the isolation MCU flashed with bootloader, you can upload code by USB-TTL debugger, no need special programmer. Power Supply: Wide range input voltage 5-37V by regulator LM317 Protective diode to prevent wrong direction power connection. Support USB power. Other Features: On board songle SPDT relay 10A /28VDC or 240VAC. On board segment display to show timing. One relay signal led indicator Two config buttons, only two used. Documentation please see on this page.
