For discussion of Speeduino compatible boards designed / built by other members of the forum and for guidance around making such a board
By tooly
#35904
hi,
tried to do a small layout with tle8080/atmega2561 and 0805 package so its easy to solder (5x5cm)

2 injectors
2 active ignition coils or 1 passive ignition coil with separate ground plane
1 crankshaft sensor with VR-conditioner
6 analog inputs: CLT, IAT, TPS, BAT, Wideband Lambda, onboard MAP (4250 or 6400)
1 fuel pump out
1 idle valve out
1 tacho out
4 free and non-wired general purpose I/O's
USB programming interface with PL2303SA (Tunerstudio)

all in/outputs can be programmed different

https://github.com/oelprinz-org/blitzbox2561

shematic and picture see below

thomas
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By NickZ
#38989
unBond wrote: Sat Nov 09, 2019 8:22 pm
tooly wrote: Fri Oct 25, 2019 11:56 am i did a blitzbox/bl49 swap. not tested at the moment.
https://github.com/oelprinz-org/blitzbox2561cj125
Its possible adapt to 4 injector and 2 coil drivers?
Why? there are dozens of other designs that have more injector channels and different configurations, this design is intended to be what it is..

And Great job, looks nice.
By tooly
#38993
hi unbond,
nickz is right. there is no need for that modifications. this board was designed for running an engine with minimal size and components.
By unBond
#39006
NickZ wrote: Sun Nov 10, 2019 12:28 am
unBond wrote: Sat Nov 09, 2019 8:22 pm
tooly wrote: Fri Oct 25, 2019 11:56 am i did a blitzbox/bl49 swap. not tested at the moment.
https://github.com/oelprinz-org/blitzbox2561cj125
Its possible adapt to 4 injector and 2 coil drivers?
Why? there are dozens of other designs that have more injector channels and different configurations, this design is intended to be what it is..

And Great job, looks nice.
because that's what has smallest footprint i ever see here, perfect for "hide". Looks nice.
By tooly
#39016
hope i will solder and test blitzbox2561cj125 next 2weeks.
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