Stargate switch v1

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First version of my stargate switch.

Switch v1.png

IR sensor: It receives a modulated IR signal (usually of 38kHz or nearby; hence the need for modulation circuit for IR LED). The sensor is active low. For exact pinout consult the datasheet (ie. sfh 5110), or play a bit, and test it with a TV remote.

To check IR led works, you can test it with a digital camera.

The switch detects hand at distace up to 10-15 cm.

My text is just fine :-P

Photo: Switch v1 breadboard.jpeg

That's the fucking table, not skin. Crazy dutchman :-P

References: http://home.cogeco.ca/~rpaisley4/LM555.html#3 using 555 as an astable oscillator - calculations for frequencies... to get the rough one. To match it, you have to play with the trimmer.