Homemade TV remote control off electrical power supply circuit

When the infrared receiver tube PH302 receives a signal from the remote control, the CX20106A selected frequency amplifier output

a low-frequency signal, the low-level signal by the D and R charges C, so C negative side potential falls below 1 / 3Vcc , .png">555 circuit discharge cutoff relay shock release, cut off the power supply. RC circuit sensitivity can be set to the action, press the remote control is generally 3-5 seconds. Press S1 relay circuit namely self-locking when powered on.

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