JimStimX Kit – MS3X Stimulator Expansion Board – Unassembled

Expand your MegaSquirt test bench with JimStimX to simulate and verify MS3X inputs and outputs. DIY kit includes LEDs, switches, pots, and headers. Requires JimStim.

Expand Your MegaSquirt Test Bench for MS3X

Already using a JimStim to test your MegaSquirt ECU? The JimStimX Expansion Board takes your setup even further—letting you simulate, test, and verify MS3X expansion card inputs and outputs directly on the bench.

This DIY kit version includes everything needed to assemble your own JimStimX—just add solder and a JimStim (sold separately).

Key Features:

• Designed specifically for use with the MS3X expansion board

• Simulates 4 digital on/off inputs via DIP switches

• Simulates 3 analog inputs with onboard trim pots

• Test MS3X output activity via onboard LED indicators

• Connects easily to a JimStim using the three pull-off jumpers:

  • 5V power

  • Ground

  • Cam input signal

• Includes pre-labeled components and hardware, packaged like our MegaSquirt ECU kits for easy assembly

Requirements:

• Requires a working JimStim (sold separately) to supply power, cam input, and ground

• Intended for use with MegaSquirt MS3 + MS3X configurations

What’s Included:

• JimStimX PCB and all through-hole components

• DIP switch and three trimmer pots

• 10 status LEDs with current-limiting resistors

• Header pins and connectors

• Assembly instructions available online