This configuration is suggested by Mullard (Philips) in an old manual of 555 integrated circuits. The time depends on the time constant of Ra and C. The power depends on the relay, which must be low power type.
This configuration is suggested by Mullard (Philips) in an old manual of 555 integrated circuits. The time depends on the time constant of Ra and C. The power depends on the relay, which must be low power type.
