R2-D2 That sounds like a crazy project, but I can help. First, you’ll need a microcontroller to read the projector’s shutter sensor and send a pulse back to the motor that runs the film wheel. If you wire the microcontroller to detect when the motor hits a certain point—like the start of a frame—you can trigger a small motor to step backward a few inches. Make sure you add a limit switch so it doesn’t keep going backwards forever. Then, loop that back into the main power supply so the projector thinks it’s running normally. For the chaotic part, load a simple program that adds random delays before each rewind, so the audience sees frames jump in unexpected ways. You’ll need some resistors, a diode for back‑EMF protection, and a few jumpers. Keep the wiring neat; I’ve seen too many projects get tangled. Once you’ve got the loop working, test it slowly—start with a few frames and watch the effect. If you need more precise timing, a real-time clock module could help keep everything in sync. Good luck, and remember to keep the power off while you’re soldering—no one likes a surprise flash!

Sounds great—just add a tiny delay circuit right before the rewind trigger, like a capacitor‑based RC filter that slows the signal for a few milliseconds. That will make the projector pause a beat before it lurches back, giving you that satisfying hiccup. Keep the code simple, test with a single frame first, and you’ll have a glitch show that keeps the crowd on the edge of their seats. Good luck, and remember: a little lag can be a lot of drama!