Paul
My EC2 is at TC's and may take some time to fix. To get back flying I would like to try building your 555 fuel injection system. The chance for success is greatly dependent on your willingness to provide the Digi-Key part numbers for the parts shown on your diagrams.  Can you provide the digi-key partnumbers for: TLC555............. MOSFET TO22ST  ? .....................AND/OR NTE67 FET............... OP AMP TLC279 ? ..............OR ....TLC272............. heat sink.............. pc boards................ LM78LO5................1N4002..................1N914...............
There are hundreds of parts to pick from and cannot be logically determined w/o your knowledge  and part numbers.
John Prendergast

You don't meed the DigiKey part numbers.

Lets take the TLC 555 for example. A key part.

Any through hole part will work. I don't expect you will be
doing surface mount. Pick the cheapest or the most expensive.
The descriptions are self explanatory.

All TLC555's work the same. Some will work at a higher temperature.

The same goes for all the other part numbers.

Paul Lamar


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