Good Morning.
I have unsuccessfully tried to build an Oscillator that, when it pulses, closes a relay, causing current to flow through the relay.
It is for an automotive installation, so it is 12v.
I used a 555 chip as the timer.
So here is what I am trying to do, and any help is greatly appreciated.
I want to close a normally open momentary switch that will allow 12v power to the timer or oscillator.
The timer will then send out pulses of 12v to the relay. The length of the pulses should be very short, like .20 seconds.
What I want the pulse to do, is to power a relay. When the switch portion of the relay closes, it allows current to flow for that .20 seconds, pulsing as long as the switch is held closed.
Okay, is it better to use a Transistor instead of the relay?
The output of the timer could active the transistor (B, I think), then allow the current to flow from C to E?
If so, what size transistor would I use?
I tried all this, and it didn't work.
I found a design that I am trying to make work for my purpose. I have attached the design I tried.
Any help is greatly appreciated.
I have unsuccessfully tried to build an Oscillator that, when it pulses, closes a relay, causing current to flow through the relay.
It is for an automotive installation, so it is 12v.
I used a 555 chip as the timer.
So here is what I am trying to do, and any help is greatly appreciated.
I want to close a normally open momentary switch that will allow 12v power to the timer or oscillator.
The timer will then send out pulses of 12v to the relay. The length of the pulses should be very short, like .20 seconds.
What I want the pulse to do, is to power a relay. When the switch portion of the relay closes, it allows current to flow for that .20 seconds, pulsing as long as the switch is held closed.
Okay, is it better to use a Transistor instead of the relay?
The output of the timer could active the transistor (B, I think), then allow the current to flow from C to E?
If so, what size transistor would I use?
I tried all this, and it didn't work.
I found a design that I am trying to make work for my purpose. I have attached the design I tried.
Any help is greatly appreciated.
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