- #1
Gogeta007
- 23
- 0
Im not sure if this should go here, but. . .
Im building a motion detector.
I have the breadboard hooked up the following way
using an op amp, a potentiometer, photocells, resistor and led.
http://img6.imageshack.us/i/breadboard.jpg/
So it seems to work fine, but I wanted to replace the LED with a relay switch, I was reading that you need a transistor to go with it to make a working switch. and I don't really know where to put the transistor, I am guessing its between the op amp and the relay switch?
The question is:
How much voltage can go troug the relay?
Im making a discharge from 5 capacitors (330V around 100uF) as soon as the photocell senses movement, what I want to know is how to wire it.
heres my tought in a little drawing:
http://img207.imageshack.us/img207/8531/relayswitch.jpg
http://img207.imageshack.us/i/relayswitch.jpg/
or if anyone can tell me how to make one?
also if someone can recommend a sensitive motion detector (i want it to sense a small projectile that's supposed to be moving fast, but it should pass right by the photocells
==thnkz in advance==
-gogeta
Im building a motion detector.
I have the breadboard hooked up the following way
using an op amp, a potentiometer, photocells, resistor and led.
After placing the Op Amp on the breadboard, put one pin on a Cds cell in the node connected to pin two of the op amp and the other Cds pin in the seventh pin of the op amp. The other cds cell likewise connects to pins two and four of the op amp.
Connect the middle pin of the potentiometer to pin three of the op amp, the right pin of the pot. to pin seven of the op amp and the left pin of the pot. to pin four of the op amp.
Connect the negative of the battery to pin 4 of the op amp
Connect the negative (usually shorter) lead of the LED to pin six of the op amp. Connect the other pin of the LED the 1K resistor. The other side of the 1K resistor should be connected to pin seven of the op amp.
Connect the positive battery wire to pin seven of the op amp.
http://img6.imageshack.us/i/breadboard.jpg/
So it seems to work fine, but I wanted to replace the LED with a relay switch, I was reading that you need a transistor to go with it to make a working switch. and I don't really know where to put the transistor, I am guessing its between the op amp and the relay switch?
The question is:
How much voltage can go troug the relay?
Im making a discharge from 5 capacitors (330V around 100uF) as soon as the photocell senses movement, what I want to know is how to wire it.
heres my tought in a little drawing:
http://img207.imageshack.us/img207/8531/relayswitch.jpg
http://img207.imageshack.us/i/relayswitch.jpg/
or if anyone can tell me how to make one?
also if someone can recommend a sensitive motion detector (i want it to sense a small projectile that's supposed to be moving fast, but it should pass right by the photocells
==thnkz in advance==
-gogeta
Last edited by a moderator: