LED test light
Components
- LED x 2
- Brass rod
- Wire x 2
- Soldering
- Resister x 2
- Heat shrink
Function
The wires are conductors, the carry the power from the power source through the resistors to the LEDs
The resistors protect the LEDs from high voltages
LEDs (light emitting diode) are diodes so they only allow the current to pass through them in one direction they also work as indicators to show that there is a voltage present. LEDs are also used because they use a low voltage that will not damage components that use low voltages like computer systems
The brass rod acts as a conductor carrying the power from the component being tested to the other terminals of the LEDs
The soldering is a conductor that permanently connects the components together
Heat shrink is an insulator used to cover the components to protect them from a short circuit
Usage
The probe is used to check if there is power at a certain point and if it is positive or negative. The LEDs only allow the power to go in one direction therefor if the green light goes on it indicates that the tested component is positive and if the red goes on it is negative.
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