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Scorpion23 · 04-09-2008, 04:35 PM

I think that by the time you make the circuit out of standard components you'd be close to emulating the purpose of a 555. Is there a particular reason you're shying away from the IC route?

But anyway, I'll have to check my circuit books for a simple one. I made an LED flasher years ago that alternated between two different color LEDs. I'm pretty sure it let a charge build up in the transistor until it was enough to open the gate. I'll see if I can find it.

Also, I know it's more convention than anything else in a low-voltage circuit, but the switch should be between the buzzer and + terminal.

04-09-2008, 04:35 PM	#3 (permalink)
Scorpion23 Psycho	I think that by the time you make the circuit out of standard components you'd be close to emulating the purpose of a 555. Is there a particular reason you're shying away from the IC route? But anyway, I'll have to check my circuit books for a simple one. I made an LED flasher years ago that alternated between two different color LEDs. I'm pretty sure it let a charge build up in the transistor until it was enough to open the gate. I'll see if I can find it. Also, I know it's more convention than anything else in a low-voltage circuit, but the switch should be between the buzzer and + terminal. __________________ "Empirically observed covariation is a necessary but not sufficient condition for causality" - Edward Tufte Last edited by Scorpion23; 04-09-2008 at 04:38 PM..