DIYEFI.org Forum

Hey Fred, There is a class of devices called "shunt regulator"s that could generally be described as precision zeners. I don't think they are typically used for high power and personally, I've never used one, but it may be something you might want to take a look at. Not acceptable to pump ...

My plan is to use a decade box to place various amounts of resistive load on the output pins of the above devices ..., Any other thoughts on the above? is there anything else I should test to support/discredit these devices? Hi Dan, I don't know what the power dissipation specs for your "decad...

Hoping that someone with a bit of experience can help me out - One of my sons has a 1995 E300D that we wanted to play around with by adding an intake air heater to improve cold running performance during the period from when the glow plugs turn off / engine starts to when the motor has heated up a b...

1. You're right that there was almost no load on the analogue rail. Ideal test conditions, actually. Not acceptable to pump a noise source into the CPU rail, though, just attach 10, and same behaviour. Something is required to keep the Voltage on the rail regulated from both directions. You're righ...

Dual reg + 5V6 zener + 470 ohm inputs + schottky diodes = bad conditions for the CPU. 5V1 might be a better choice IF it doesn't conduct too much at idle. If that doesn't solve it, we need to rethink the protection as it's currently not 100% safe. I measured 5.6 at the pin with 12v applied to outsi...

Dual reg + 5V6 zener + 470 ohm inputs + schottky diodes = bad conditions for the CPU. 5V1 might be a better choice IF it doesn't conduct too much at idle. If that doesn't solve it, we need to rethink the protection as it's currently not 100% safe. I measured 5.6 at the pin with 12v applied to outsi...

Ignorant questions - Do you use a wideband O2 sensor to modify engine operation real-time, or is it for lookin at / tuning purposes? If used as an input to the engine control stategy, should a Bosch CJ125 (http://www1.futureelectronics.com/doc/BOSCH/0272240104.pdf - good luck trying to find a real d...

Random comments in no particular order - 1. The BIP373 appears to have been designed for use with 5V logic (first sentence in data sheet and application schematic). But, of course you have to supply the right amount of current (base resistor). 2. IGBTs purposely designed for ignition (ON, Fairchild,...

Doesn't sound right to me either. The BIP373 appears to have a current gain of about 1,000 (Fred I'm not sure what ignition Darlingtons you checked previously where the gain was approx 100) which should (barely, given the large Vbe-sat of the BIP373) provide enough current to fire with your drive im...

Thank you very much Fred and Peter. I now how have a much better understanding of the relationship between the hardware (gear / sensor) and software (especially the "decoder" term).
Huff