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Optical Door Bell

Optical Door Bell

thingiverse

I'm enjoying my music with headphones on, but suddenly I hear nothing - not even the doorbell ringing. To resolve this issue, I built a basic optical doorbell using an LED strobe light and some simple electronic components. The explanation is in the pictures. Here are the parts I used: 1. 12V BASETech Strobelight LED 2. Kemo B042 Time switch 3. HF33F Relay 4. Power connection socket 5. Various wires

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