-12vdc signal to switch automotive ignition amplifier
-12vdc signal to switch automotive ignition amplifier
(OP)
High guys... new to the sight and glad that I found you.
To the problem....
I currently have a -12vdc to ground signal that i need to trigger an ignition amplifier which can be fired 1 of 2 different ways.
1. it can be triggered if a certain resistance level of 400-1300 ohms is met between 2 pins or...
2. it can be triggered if a pin to ground contact in interupted. (break of ground)
Whichever way I go it needs to be able to fire at a rate of about 600 - 700 times per second.
Thank you in advance
Steve
To the problem....
I currently have a -12vdc to ground signal that i need to trigger an ignition amplifier which can be fired 1 of 2 different ways.
1. it can be triggered if a certain resistance level of 400-1300 ohms is met between 2 pins or...
2. it can be triggered if a pin to ground contact in interupted. (break of ground)
Whichever way I go it needs to be able to fire at a rate of about 600 - 700 times per second.
Thank you in advance
Steve





RE: -12vdc signal to switch automotive ignition amplifier
RE: -12vdc signal to switch automotive ignition amplifier
RE: -12vdc signal to switch automotive ignition amplifier
You problem is vague. I'm assuming that you have -12V but the amp needs something like +12V? One possibility is to use an optoisolator?
RE: -12vdc signal to switch automotive ignition amplifier
When someone mentions 555's here, (shame on you OperaHouse!! Go to your room.
I and others will always pipe in with, "just use a microcontroller". Microchip has 6pin SOT23-6 controllers that would let you do all sorts of stuff to/with your signals.
If you want more suggestions I suggest you flesh out your description a bunch more.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: -12vdc signal to switch automotive ignition amplifier
Mike Halloran
Pembroke Pines, FL, USA
RE: -12vdc signal to switch automotive ignition amplifier
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: -12vdc signal to switch automotive ignition amplifier
Operahouse and I thought he was talking a gated oscillator ... but he's talking about the rep rate for a single pulse inverter/switch, to replace breaker points.
... brain fade.
Mike Halloran
Pembroke Pines, FL, USA
RE: -12vdc signal to switch automotive ignition amplifier
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: -12vdc signal to switch automotive ignition amplifier
It is the signal that I am getting from the factory optical distributor and since I do not have the ECU computer I am trying to find a way to fire my ignition module with the only signal that I have. I could probably take the opto isolator out and machine the shaft putting cam lobes on it and simply use points but where is the challenge in that?
RE: -12vdc signal to switch automotive ignition amplifier
Being a "neophyte"... the first thing that came to mind was a relay of some sort that would be reliable at a rate of 40000 cycles per minute. This could be used to imulate a breaker point system but is there a relay with that kind of duty cycle?
RE: -12vdc signal to switch automotive ignition amplifier