HOW TO TEST DIODE by digital multimeter and Analog multimeter
DIODE TESTING
Diode is a basic electronic device and it has wide application on many circuit such as rectifying , switching , protection circuit , polarity protection etc. Before checking it need to know a necessary information about diode. Diode has many package below is some example. On its body has shown diode symbol so that you can know its terminal function anode or cathode.
This is a symbol of diode , Anode for positive voltage ( + ) and Cathode for negative voltage. If supplying the right polarity voltage to the diode terminal ... V+ to anode and V- to cathode this called " Forward Bias " this case diode will let current flow. If supplying reverse polarity to the diode ..... V- to Anode terminal and + to Cathode terminal , this case diode will block current and no current flow this called reverse bias. In case of reverse bias there is only leakage current flow and amount as uA or mA for Germanium Diode and there is not any leakage current for Silicon Diode.
