DzlJim

Thank you so much for the input. I actually have a digikey catalog, so now I need to chew on this stuff and see if I can digest it all!

Thanks for the response. I must reiterate how electronically illiterate I am. I have no idea what you just said, but it sounds simple enough. Would it be possible for you to maybe give me part numbers from an online supplier so I can figure out what you're refering to? Or (I don't want to break any rules here) is this something that you'd be willing to build for some form of compensation? Thanks.

I tried to keep it in simple electronics terms, but I'll give it a shot what the actual project is: I need to test Diesel Fuel Injectors that are electronically actuated. They require 110v DC to operate. Picture a cylinder head from a V-8 Diesel, thus 4 cylinders/4 Injectors. I need to fire the 4 injectors, in sequence NOT at the same time (for other reasons). I need to do this electronically/automatically. Id like to vary the 'On' time, or Pulse Width as it's called, and I need to control how many 'Injections' per minute, or how many times the 4 injectors fire in one minute. OR determine (variable, knob?) how many 'Injections' they are to do, period. Like 100, 500, or 1000. I can rig up a motor with a cam and microswitches and stuff, but that's too hokey for me. I'd rather have an electronic control panel that is capable of doing everything. Make more sense? Thanks for any help.

First off, I am pretty much electronically illiterate, though I'm quite handy and willing to learn. I have a project I need assistance with. I'll do my best to describe what I need. 1) I need to convert 12v DC or 120v AC TO 110v DC. Must be DC not AC. 2) I need an electronically controlled device that will open then close a series of 4 switches/triggers in succession. The closed time for each switch to be around 4 milliseconds, and it would be great if this was adjustable. If it needs to be a set value, no problem. Each switch is, in essence, transfering the 110v DC current to a device. 3) I need this device to repeatedly open and close these 4 switches until it's told to stop. Time between the opening/closing of each switch is variable (I have no set requirement for this) though it might be controlled by 4). 4) I would like for this device to be able to control how many times per minute the group of 4 switches can be opened and closed, kind of an RPM value. 5) Device would have a Power in terminal (then convert to 110v DC?), Ground terminal, and 4 Out terminals one from each switch. Hope this makes sense. Can anyone tell me if this is possible/practical to do? Thanks for any help, Jim