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DC 0 To 25V Voltage Sensor Module - a blue circuit board with a two-terminal screw connector, a circular component, and three output pins.

DC 0 To 25V Voltage Sensor Module

PKR 60
IR-08H Infrared Obstacle Avoidance Sensor Module KY032 For Arduino - a black circuit board with an IR LED, receiver, two white potentiometers, and four header pins.

IR-08H Infrared Obstacle Avoidance Sensor Module KY032 For Arduino

PKR 210
Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - a blue rectangular microcontroller circuit board featuring a USB port, power jack, reset button, and various pin headers.

Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz

PKR 1,570
555 Timer IC NE555 LM555 Timer IC - a black, rectangular 8-pin dual in-line package integrated circuit with silver-coloured metal pins.

555 Timer IC NE555 LM555 Timer IC

PKR 20
Ky-038 LM393 Sound Detection Module - a red circuit board with a microphone, a blue potentiometer, a black chip, and four connector pins.

Ky-038 LM393 Sound Detection Module

PKR 110
Pulse Sensor Pulse Heart Rate Sensor Arduino Heartbeat Sensor - a close-up of the circular heart-shaped black and white PCB held by fingers with three attached red, black, and purple wires.

Pulse Sensor Pulse Heart Rate Sensor Arduino Heartbeat Sensor

PKR 410
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