hw_microRusEfi

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Why are we using a nonstandard debug header?

5

There exists a standard debug header that is: - physically smaller - industry standard (no more eBay pinout mysteries and fake programmers) - keyed (impossible to plug in backwards) Here's...

mck1117

@dron0gus is wondering why do we use TC4427 and IGN TLE8888 outputs @mck1117 reminds us that once upon a time with no supporting data, @960 decided he didn't like them

rusefi

we want to drill the case for USB cable, we need a rubber plug Should cost under $0.5 each at QTY 10

rusefi

Low-profile MRE

3

For some PnP applications we want MRE to be very slim. 2x5 headers and even vertical USB connectors are not really required. The tallest required component is 100uF 50V C2...

rusefi

Re-purpose AV3 analog inputs for 2nd channel hall input (same as existing CAM)

1

at the moment we have one Hall channel and one channel which could be either VR or hall depending on what resistors are mounter. This hardware flexibility is quite labor...

rusefi

Could we use the empty area above C1 C3 or is that a bad idea for EE reasons? 

rusefi

U5 - LD1117 is a dollar cheaper

3

LM2937 used for U5 is $1+ while LD1117S33TR from mouser is $20@100. Shall we change U5 to LD1117S33TR? @mck1117 believes the pinout is different so schematics and PCB would need...

rusefi

Power supply load dump protection

3

We currently have no protection against the load dump tests enumerated in ISO 16750-2 (namely the 80-100v positive pulse). This one is pretty easy to resolve - just add a...

mck1117

reverse voltage protection of TLE9201 and etc

1

DonaldBecker says "The v0.3 MRE appears to have a weakness with reverse voltage protection (when the battery is connected in reverse, applying -12V to the +12V circuit). Specifically unprotected 12V...

rusefi

The main supply is probably reverse-battery safe, but what about the rest of the hardware aboard the ECU, as wired in a car without a main relay?

mck1117