Learn: Component Descriptions

LED, tri-colour LED, IR LED, laser diode, resistor, LDR, potentiometer, capacitor, push button, tilt sensor, transistor, IR phototransistor, relay module, temperature sensor, IR receiver, piezo, speaker, servo motor, DC motor, ultrasonic transceiver, PIR motion sensor

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Learn: Infrared TX and RX

OVERVIEW IR LED and IR phototransistor can send and receive light in the infrared (IR) region. This light is not visible to the naked eye, but you might be able to see this light using the camera on your mobile phone. A pair of IR LED and IR phototransistor can be used as a proximity […]

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Learn: Making a Sound Meter with a Microphone

OVERVIEW A sound meter lets you measure how loud a sound is. PART 1: ASSEMBLE THE CIRCUIT The LM358 IC and the polarised capacitor need to be orientated correctly. See below for details. PART 2: VISUALISING DATA STEP 1: Open this file and upload it to Arduino. This sketch displays the value of A0 (microphone […]

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Learn: Soldering Technique

OVERVIEW Soldering is used today to make electrical connections. Modern electronic systems are formed from thousands of components connected by soldering. If any connection fails, the system could stop working, resulting in loss of time, money, or even lives. Therefore, good soldering technique is important to ensure reliable electrical connections. Solder melts at high temperature […]

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Learn: Non-Contact Voltage Detector

OVERVIEW A non-contact voltage detector is a useful tool to detect nearby electrical fields. It can detect the presence of AC power in cables, switches, outlets, and fixtures without touching them. It can even detect static electricity!   PART 1: ASSEMBLE THE CIRCUIT     PART 2: OPERATION OF THE CIRCUIT A transistor is normally […]

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