PWM-capable low-side MOSFET driver for controlling a 9 V LEGO motor from a Raspberry Pi 3.3 V GPIO signal, sized for up to 1.4 A stall/current peaks.

5 V, 10 W MOSFET low-side heater driver controlled from an MCU DAC/gate-control output, including power/heater connectors and basic gate protection.

5 V Omron G2RL relay driver PCB using an MMBT2222A low-side transistor, input terminals, flyback diode, and screw-terminal relay output.

12 V NE555 astable ignition-coil driver using an IRF840 MOSFET low-side switch with gate conditioning, decoupling, input/output connectors, and flyback clamp protection.

Open Hornet 16-channel 28 V magnetic-hold coil driver for Honeywell ET switches. Arduino Mega/Pro Micro logic inputs drive low-side 100 V MOSFET channels for ET switch magnet coils with common ground, fail-safe pulldowns, 100 V flyback protection, dedicated 28 V coil input, and conservative high-current 4-layer PCB routing.