Claudio Buie-
1Schematic description
Schematic is for 4 Relay board and 555 timer acting to block signal from microcontroler and turn off all relay when impulse are missing for more then 1 second.
Schematic is for 4 Relay board and 555 timer acting to block signal from microcontroler and turn off all relay when impulse are missing for more then 1 second.
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