DIYAutoTune Part# JimStim-C
JimStim is essentially an engine simulator, a microcontroller which allows the generates up to 30 different toothed wheel signals, in addition to the standard distributor signal. Test your RPM input on the Stim, or tell the JimStim to provide a signal like the one from a Neon, Miata, Subaru, most Fords, and many more. It can also drive ignition input mods with pull-ups.
JimStim includes a set of user-configurable jumpers that for testing IAC motor outputs, spare inputs, and spare outputs. You can wire these up with the selection jumper wires. There is also a bank of screw terminals that let you connect things other than a standard Megasquirt to the JimStim.
The current firmware allows you to connect the JimStim to a laptop using a special cable, FTDI part number TTL-232R-3V3. This is not needed for regular operation, but lets you set the wheel pattern and output speed to display via TunerStudio, and allows you to program in custome wheel patterns or make the JimStim sweep its RPM output. As most users will never need this cable, we currently do not stock it, but could add it if there’s enough customer interest. Right now it can be ordered from Digi-Key under part number 768-1015-ND.
To power your JimStim, we recommend our 12 volt Stimulator power supply.
You can find the JimStim documentation and assembly instructions at this link.
This one is fully assembled and ready to go. It includes three jumper wires like the ones shown in the picture. If you need more for additional features, order our 10-pack of extra jumpers.
Power supply requirements: 9V battery or StimPower