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KI Maker control-interface boards

Documented interface boards for 12 V and 24 V control projects

Power the controller, switch DC loads and read industrial field signals with compact boards designed for Arduino, ESP32, Raspberry Pi, STM32, PLC and custom automation projects.

One wiring language. Three jobs. Clear PCB labels, screw-terminal field wiring, published ratings and complete documentation.

Power

Feed the bench

Bring in a 24 V-class DC supply and provide regulated power to the controller and accessories.

Outputs

Switch the load

Control compatible 12 V and 24 V DC loads such as relays, solenoids and LED lighting.

Available KI Maker OUT-4 four-channel protected low-side MOSFET output board
OUT-4

4-channel protected low-side outputs

Four protected low-side MOSFET outputs for compatible 12 V and 24 V DC loads.

  • Up to 1.0 A on an individual channel
  • 3.0 A shared board limit
  • 3.3–24 V control inputs
$19.95
Inputs

Read the field

Bring 12 V and 24 V DC field signals safely into 3.3 V or 5 V controller logic.

Available KI Maker IN-4 four-channel optically isolated 9–30 VDC input board
IN-4

4-channel isolated digital inputs

Four polarity-independent 9–30 VDC field inputs with active-high 3.3 V or 5 V logic outputs.

  • Functional optical isolation per channel
  • Polarity-independent field wiring
  • Schmitt-conditioned logic outputs
$19.95

Choose the board by the job

Each module can be used independently or combined with the other KI Maker boards. Review the product page and documentation before applying power.

BoardJobElectrical interfaceDocumentation
PWR INTF Power the controller and accessories 18–30 VDC input; regulated 12 V, 5 V and 3.3 V rails Published
OUT-4 Switch compatible DC loads Four low-side outputs; 1.0 A individual-channel maximum; 3.0 A shared limit Published
IN-4 Read industrial DC field signals Four polarity-independent 9–30 VDC inputs; 3.3 V or 5 V logic Published

Operating note: All boards are for low-voltage DC use within their published ratings. IN-4 provides functional isolation only and is not a safety-rated barrier. None of these products is intended for AC mains, emergency-stop, SIL or PL safety functions.