This is a PWM with a fixed frequency of 100 Hz, remove the jumper and get 350 to 3K Hz adjustable with the pot. I need to change the frequency to 5 Hz the low end to 50 Hz or what the Hz ends at with the pot controlling IC/1. This will allow me to pulse, flush and check the balance of fuel injectors more to their normal operating range of 600 to 6,000 rpms.
I haven't a clue what to change to alter this frequency down lower plus not doing any damage to this kit I assembled.
Any resistance or parts change values will be greatly appreciated for this project.
I'm due for a smog check and running out of time. With 24 injectors to flush and pick i'll be able to find a balanced set of 8 with flow. I made a sight glass cylinder out of a 750 ML wine bottle on my diamond saw. I have a electronic timer to repeat tests plus a Burette tube to measure in cc's the output volumes. Sorry way off topic of the HBT ya think?
In my email box I have a much larger scan photo as an attachment but can not get this onto the forum.
Email me i'll send the diagram back that is larger in my email, i'm at R90scj@gmail.com
. Again thanks for the intrest and help. Carl.