DIYEFI.org Forum

Note fig 5 (missing the label) shows the min voltage drop will be .7 volts or so, and could be as high as 1.5 volts at 5 amps. At 5 amps and 1 volt, that's 5 watts of resistance heating to deal with. Using a MOSFET for a general purpose low side drive will dissipate much less heat. With this device ...

Cool on the Newark order. You might want to check multi vendors. I find a mix of digikey and newark is usually cost effective in low qty. Yup 1/4 watt's are fine. There are other Omnifets, anything over 5 amps will be fine, I typically suggest the large ones, for a lower Rds resistance heating. Curr...

Some parts to consider in general include, .1uF caps and 1k resistors, 2n222 transistors, also 7805's or equiv LDO's. With those parts, you can technically build about any electrical circuit. If you have enough parts that is. Specific things I'd recommend include the VNP28N04, or (if you're not scar...

Yeah, the big place I wonder if it's suspect, is my decay current prediction. I figured it started at 1 amp, and dropped to 0 amps over blah time in a fairly linear fashion. So I figured it's the same as .5 amps for blah time. Those numbers just seem big to me. Using a 12 ohm injector is about right...

As pins for many things will move around from layout to layout Not on compliant layouts they won't, no. Only the sort of optional stuff that you have to configure anyway will move around. Why not make them software configurable? Such that one links them via MTX or uses some PC software to specify t...

My gut feeling is that there isn't that much kick back or dissipation time. I could be completely wrong, though. That seems more like it! :-) Those two quotes seemed a bit odd to me. At first my small wattage claim was to high, then I come back with watts, and it's about right. Just seemed odd to m...

There might be a chance of of making it using an OVP MOSFET instead of my switched zener thing. Now that I have a zener, I can try making it run via MOSFET, then try making the MOSFET driven by the zener. I don't think it will change the results much, as the current varies and the voltage stays cons...

I'd be very surprised if you couldn't lay it out to work as is. I can very likely route it this way, but it's going to increase the noise floor, as this layout wasn't the same as PUMA's general layout. I didn't know the second ADC was disabled. I'm not sure it's a good thing to force all future lay...

Per your IRC comments, and http://issues.freeems.org/view.php?id=190, I don't follow what you mean. For example. - IAT,CHT,TPS,EGO,BRV,MAT MUST be implemented on ALL hardware designs. - TPS is optional to connect, but highly recommended for all installs So is TPS optional, or required? More importan...