Hi
Bear with me as i explain my tricky circuit and what i want it to do:
Ok, my dad gets up at 4:00AM every morning and it is very dark, when he is walking through our sunroom to the door to get to his car it is dark, he cant turn the lights on because he wont be able to turn them off without having to walk through the dark, i have made a timer circuit with a relay thet turns a 50W light on from 1 min to 16min's, i want 3 light activated switches to do this:
1) When the lights in that same room are on i want the LDR to turn my circuit off so you can walk around that room without wasting the batteries.
2) another LDR outside so when the sun has risen enough the circuit will turn off so people can walk aroung in that room without having to turn the circuit off and when it is dark the circuit is reactivated.
3) i want the last LDR as a trigger to the circuit so that when my dad walks through the laser beam the curcuit for my set time limit.
the curcuit seems simple but is tricky putting it all together, all the LDR switches i beleive should have relays. IMPORTANT this is another important point: i want the circuit to run off a plug pack not batteries (for obvious reasons) i have been told that with the 14VDC 450mA plug pack i need a voltage regulator with two capacitors and a 27Ω resistor, but i need the wiring diagram im not sure how to bring this voltage from 14V and 450mA to the 12V the circuit alone needs but the light i am using is 50W so i need to know how how much the circuit draws with a multimeter.
If someone could help please. (If you could please i need an answer quick because i have been at this circuit for ages trying to figure it out myself but cant plus my dad has fallen over multiple times)
Thanks, Chris
Bear with me as i explain my tricky circuit and what i want it to do:
Ok, my dad gets up at 4:00AM every morning and it is very dark, when he is walking through our sunroom to the door to get to his car it is dark, he cant turn the lights on because he wont be able to turn them off without having to walk through the dark, i have made a timer circuit with a relay thet turns a 50W light on from 1 min to 16min's, i want 3 light activated switches to do this:
1) When the lights in that same room are on i want the LDR to turn my circuit off so you can walk around that room without wasting the batteries.
2) another LDR outside so when the sun has risen enough the circuit will turn off so people can walk aroung in that room without having to turn the circuit off and when it is dark the circuit is reactivated.
3) i want the last LDR as a trigger to the circuit so that when my dad walks through the laser beam the curcuit for my set time limit.
the curcuit seems simple but is tricky putting it all together, all the LDR switches i beleive should have relays. IMPORTANT this is another important point: i want the circuit to run off a plug pack not batteries (for obvious reasons) i have been told that with the 14VDC 450mA plug pack i need a voltage regulator with two capacitors and a 27Ω resistor, but i need the wiring diagram im not sure how to bring this voltage from 14V and 450mA to the 12V the circuit alone needs but the light i am using is 50W so i need to know how how much the circuit draws with a multimeter.
If someone could help please. (If you could please i need an answer quick because i have been at this circuit for ages trying to figure it out myself but cant plus my dad has fallen over multiple times)
Thanks, Chris