For anything related to the 'official' Speeduino boards (Eg v0.3, v0.4 etc)
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By Franz1368
#71314
Hi everyone, I'm currently building a v0.4.3c board (the last tht with proto area), and I'm having issues finding the mosfets and the map sensor, both are discontinued. I found the NXP MPX5700AP as a replacement, but it goes all the way up to 700 kPa (should be fine, but feel free to demour), the mosfets are giving me a hard time (STP75NS04Z. I know that the Vds and Id sholud match or be higher and the switching time should be the same, but what part(s) do you suggest? Thanks in advance
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By PSIG
#71321
Although obsolete, the MPX6250AP and similar versions are still available, but require some searching to find. There are alternatives that can be adapted. While I have a small module to mount a small MPXH or MPHXZ sensor for connection (1, 2.5 and 4-bar still available), I have also made quick adaptations using those sensors simply glued and wired to the PCB. You don't plan to remove it, right? ;)

Example of an adapter module with MPXH sensor-to-PCB connections to replace MPX sensors:
Image

One of many alternatives that is bulkier but very available is using an inexpensive Delphi 16235939 2-bar sensor, cutting the connector plastic off (leaving the pins to solder), and attaching to the board.

Remove the silicone sleeve and push-on a hose:
Image

Yes, an external MAP is yet another option, or the one like above externally with hose connection, or adapting any suitable MAP sensor and calibrating it in TunerStudio, either internal or external. Lots of options, which is good, but can be confusing.
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By Franz1368
#71324
Wow that's amazing how many solutions are there, and that MiniMap is absolutely brilliant! The only doubt now remains the set of MOSFETs

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