While using a electronic component like a resistor, capacitor, diode, etc. it is important to test them to avoid any damaged component in the circuit. a multi-meter would be really useful in testing the components.
The following are the ways we can test different components using a multi-meter
RESISTORS : resistors are devices which are used to limit the current flow. the value of a particular resistor can be read using the color coding over it. to test it we put the multi-meter in resistance mode of desired range and measure the resistance if the value shown in the multi-meter is close to the value from color coding then the resistor is in good condition. if the multi-meter shows 00 or 1 then the resistor is damaged (i.e shorted or open circuited).
DIODE: A diode should conduct only in one direction. turn the multi-meter knob to diode or continuity mode. connect the black probe to the anode of diode (the side with silver band) and the red probe to the cathode. now the multi-meter should make a small beeping sound and meter should show some value. if the meter shows open circuit then the diode is damaged. reverse the terminals and the meter should show open circuit, if it shows some value then the diode is damaged.
CAPACITOR: if the multi-meter has the mode to measure the capacitance then directly measure it and compare to the value on the capacitor. if the meter doesn't have that mode then put the multi-meter in continuity mode and connect the capacitor to the two probes (the capacitance should be more than 10 uF to test in this method) the capacitor will charge due to the current from the multi-meter,after about 5 seconds turn the multi-meter knob to DC voltage mode. now the multi-meter should show some voltage reading which will be dropping. This indicates the capacitor is storing charge and working.
The following are the ways we can test different components using a multi-meter
RESISTORS : resistors are devices which are used to limit the current flow. the value of a particular resistor can be read using the color coding over it. to test it we put the multi-meter in resistance mode of desired range and measure the resistance if the value shown in the multi-meter is close to the value from color coding then the resistor is in good condition. if the multi-meter shows 00 or 1 then the resistor is damaged (i.e shorted or open circuited).
DIODE: A diode should conduct only in one direction. turn the multi-meter knob to diode or continuity mode. connect the black probe to the anode of diode (the side with silver band) and the red probe to the cathode. now the multi-meter should make a small beeping sound and meter should show some value. if the meter shows open circuit then the diode is damaged. reverse the terminals and the meter should show open circuit, if it shows some value then the diode is damaged.
CAPACITOR: if the multi-meter has the mode to measure the capacitance then directly measure it and compare to the value on the capacitor. if the meter doesn't have that mode then put the multi-meter in continuity mode and connect the capacitor to the two probes (the capacitance should be more than 10 uF to test in this method) the capacitor will charge due to the current from the multi-meter,after about 5 seconds turn the multi-meter knob to DC voltage mode. now the multi-meter should show some voltage reading which will be dropping. This indicates the capacitor is storing charge and working.
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