Introduction:
Welcome to the "Phase Neutral Earth Tester" project, a circuit designed without the use of ICs and transistors, crafted specifically for a 3-pin plug. This innovative project employs three different-colored LEDs to provide distinct indications. Now, let's delve into the comprehensive details of this intriguing project.
Connection:
The circuit features three LEDs and three 1N4007 diodes. The diodes play a crucial role in rectifying AC voltage into DC. Each LED's positive terminal is connected in series with a 100KΩ ½ Watt resistor and the cathode of a 1N4007 diode. Repeat this setup for the three LEDs. The common anode of the LED trio is connected to the phase of the 3-pin plug.
For the red and yellow LEDs, their negative terminals are connected in parallel to the neutral of the 3-pin plug. On the other hand, the negative terminal of the green LED is linked to the Earth pin of the 3-pin plug. This configuration ensures a reliable and effective Phase Neutral Earth Tester. Stay tuned for more insights into this fascinating project!
Part List:
1) 5mm
LED=3
2) 1N4007
Diode=3
3) 100KΩ
½ Watt Resistor=3
4) 3
Pin Plug=1
5) Some
Wires
Working:
When the 3-pin plug is connected to the power supply, the phase is shared among the three LEDs. Initially, the first two LEDs illuminate when they receive both the phase and neutral. Subsequently, the third green LED is connected between the phase and earth. Upon detecting earth on the plug, the green LED lights up. The colors of the LEDs signify:
- Yellow: Phase
- Red: Neutral
- Green: Earth or Ground
Uses of This Project:
This circuit proves to be highly beneficial for electricians. Typically, when using a normal tester, only the phase is checked. However, with this tester, electricians can verify the presence of phase, neutral, and earth, providing a more comprehensive testing capability.
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By,
G.Guruvel
Sarveshwar,
EEE
Dept.
Posts
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