Diode

Diodes allow the electricity to flow in one direction. The arrow of the circuit symbol shows the direction in which the current can flow. Diodes are the electrical version of a valve and early diodes were actually called valves.

A diode allows current to flow in only one direction.

Types of Diodes

1. Single Diode
2. Double Diode
3. Full Bridge Diode
4. Zener Diode
5. Light Emitting diode

1. Single Diode

Diode Silver Side positive Leg & Second Side Negative Leg.

Symbol

Checking

2. Double Diode

Symbol

Checking

Step 01:

Meter Set X10. Meter Positive probe connect on Positive leg and Negative Probe Connect on First Negative Leg and Second Negative Leg .Meter Show any Reading.

Step 02:

Meter Set X10. Meter Positive probe connect on First Negative leg and Second and Negative Probe Connect on Positive Leg.Meter Show no Reading.Diode OK

3. Full Bridge Diode

Symbol

Checking

Step 01:

Meter Set X10. Meter Positive probe connect on Positive leg and Negative Probe Connect on Negative Leg.Meter Show any Reading.

Step 02:

Meter Set X10. Meter Positive probe connect on Negative leg and Negative Probe Connect on Positive Leg.Meter Show any Reading.

4. Zener Diode

Symbol

Checking

Step 01:

Meter Set X10. Meter Positive probe connect on Positive leg and Negative Probe Connect on Negative Leg.Meter Show any Reading.

Step 02:

Meter Set X10. Meter Positive probe connect on Negative leg and Negative Probe Connect on Positive Leg.Meter Show any Reading.

5. Light Emitting Diode or LED

Symbol

Checking

Meter Set X10. Meter Positive probe connect on Positive leg and Negative Probe Connect on Negative Leg.Meter Show any Reading.

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