How to use a transistor as a switch in a turbo controller?

[palmertech]

First off, know that i do have a decent amount on electrical components. I am making a turbo fire controller, and reading some stuff online, i found you could use an astable vibrator, often used to flash leds. However, most of them require 4v or higher, which is too high for what i need. I figured i could use a flashing light circuit from a cracked toy phaser, as it will run on the lower voltage i have (2v). It puts out a 1.94v pulse several times per second from the led terminals. I have used only relays in circuits like this before, as they required more voltage. How can i use a transistor to allow current to flow through the two switch contacts on the controller only when the voltage from the led circuit is on? Any help is very much appreciated.

[codeman]

It seems like there might be a simple way to do this...but I don't have a clear picture of what you actually want your signals to do.

So when you push a button on the controller, you want it to always be a turbo button? Or do you want to be able to switch it off?

I'm assuming the button forms a pull-down circuit that's connected to the pin of an IC in the controller, right? And basically, instead of this being just a pull-down you want the pin of the IC to oscillate when you push the button to mimic the button being pushed very quickly?

[palmertech]

Yay! I figured it out on my own yesterday, i hooked up the led terminals the the collector and base, and the ic trace and ground on the controller to the base and emmiter. I am using a switch to activate the led circuit, which in turn triggers the turbo fire. Note that i am new to transistors, so i may be misremembering th e, c,b pins i connected to. I was going off a scematic for a robotic servo trigger circuit, but i was able to replace most of it with the led flashing circuit. I will post a tut soon. Man, goldeneye 64 rocks with turbo on the silenced pp7!

[codeman]

Well I have no idea what you're trying to exlpain without a schematic, but glad it works!

If you ever need an oscillator that's low voltage again, check out
http://en.wikipedia.org/wiki/Relaxation_oscillator
you can find a low voltage op-amp or comparator pretty easily, and it makes nice square waves

[palmertech]

Darn. In my circuit, i put a switch on the output, not the power input. This made it work fine, but it was running continously overnight. So it died on me. I will try to get replacement parts today.