Transistor Based Relay Driver Circuit. For example input from the pulse output digital pulse of 12 volts to drive to the transistor. By adding a 470 uf electrolytic capacitor at the base of the relay driver transistor a short lag can be induced so that the transistor switches on only if the input signal is persisting.
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When the input signal passes through the i k resistor to the base of the transistor it conducts and pulls the relay. A relay driver circuit acts as a buffer between the control board s intelligence and the relatively high current drawn from the relay coil. Circuit design of 12v relay driver using transistor as a switchabout this video a relay is an electromagnetic switch operated by a relatively small electric.
A microcontroller typically will output a high or low logic level 3 3 or 5v for a high and 0 volts for a low and is used to switch on a driver transistor or integrated circuit.
Figure 3 is the driver relay circuit by use input voltage to feed to the relay coil but has some voltage junction base and emitter lead of transistor. Circuit design of 12v relay driver using transistor as a switchabout this video a relay is an electromagnetic switch operated by a relatively small electric. An electronic circuit will normally need a relay driver using a transistor circuit stage in order to converter it s low power dc switching output into a high power mains ac switching output. By adding a 470 uf electrolytic capacitor at the base of the relay driver transistor a short lag can be induced so that the transistor switches on only if the input signal is persisting.
