PWM output bench testing
 

I have a quick question. Is it possible to get one of the PWM outputs to fire on the bench top, just feeding power to the Adaptronic? For example, can I just feed it power, and change the PWM output for a set duty cycle at 0 RPM? I want to use it to test trigger a solenoid, changing PWM frequency and duty cycle, but do not want to have to build a stimulator circuit to simulate the engine sensor input triggers.

This is my evil plan...
https://www.miataturbo.net/forum/t43475-3/#post517984

I posted this question up on the Adaptronic site as well.

Nick at the Adaptronic forum (forum admin and adaptronic employee judging by his e-mail address) thinks that it might work. Anyone else try this, or have thoughts? Travis?

Thanks in advance.

You could make your reference air temp or something that is non-zero when the car isn't running, then you wouldn't have to worry about it being at 0 rpm.

cant you have a boost dependant trigger? if nothing else a standalone boost switch is only 14 bucks or so. This would ensure that you dont spray before you want to.

Yep I already have two of those switches from the last setup. I'll probably set one of them to turn the pump on at something like 3-5 psi, then start activating the PWM at some TBD value above that.

You no likee the software-based VR wheel simulator?

Me sad panda. http://forum.blockland.us/Smileys/bl...d/sadPanda.gif

Sorry I've been snowed under for a couple days. The easiest way would be to power the adaptronic and switch the PWM to external. Get yourself a semi welldefined potentiometer hook it upto the external input and you can set the upper and lower limits in the field under a PWM input. So if you set the top value at 5, the until will produce 100% dutycycle at 5 volts which is linear in percent dutycycle all the way to zero. Its a little indirect, but the problem is the output has to be based on some variable. You can't just tell something turn on without using another variable, and I think thats the easiest way to get at it.

No if you mean the switches, I was thinking of that for the final installation. The sad panda does not have to be banished to the Island of Misfit Mascots.

Another good idea. I'll get something put together soon and report back. I might have to work this weekend so forgive me in advance if it takes awhile to get some results posted.