r/arduino • u/Grand-Ad7769 • 7d ago
Need Help on Multiplexed Circuit
I'm building a circuit to drive an 8×8 grid of 64 solenoids, where each solenoid needs to be individually controllable in both polarities (forward current, reverse current, or off).
My current plan is to use a multiplexed H-bridge matrix — 8 H-bridges driving the rows and 8 driving the columns — controlled by an Arduino. I'm planning to use 8 L293D ICs (each has 2 H-bridges, so 8 chips gives me the 16 I need).
My questions are:
- Will this approach work as intended?
- Are there any issues with using the L293D for this?
- Is there a better way to do this overall?
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u/Grand-Ad7769 6d ago
Update: I plan to use 16 h-bridge circuits (8 row, 8 column) and control them with shift registers (so I only need 6 pins on my microcontroller)