Axiometa
Relay (3A)
Relay (3A)
SKU:AX22-0014
This AX22-sized board drops a Hongfa HK4100F-DC3V-SHG mechanical relay onto a 22 × 22 mm PCB, letting you switch mains-level or high-current loads with a single microcontroller pin. An onboard N-channel transistor driver, fly-back diode, and status LED handle the 3 V coil’s ~90 mA draw and protect your logic lines. Snap it into any AX22 backplane to add power-isolation, actuator control, or hard-off safety to projects coded in Arduino, MicroPython, or MicroBlocks—no extra wiring, no headaches.
Regular price
$4.49
Regular price
Sale price
$4.49
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Pinout
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Interface
PCB Design
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Arduino Example Code
const int relayPin = 15;
void setup() {
pinMode(relayPin, OUTPUT);
}
void loop() {
digitalWrite(relayPin, HIGH); // turn the Relay on
delay(1000); // wait for a second
digitalWrite(relayPin, LOW); // turn the Relay on
delay(1000); // wait for a second
}