Here i post a schematic of circuit implementing a window comparator output feeding a SR NOR gates latch. On the input of a window comparator resistive divider of LDR and variable resistor is connected.
The purpose of this circuit is to turn SR latch on or off depending on the intensity of light falling on LDR. On the ouput of a latch i have connected LEDs through external pull up and pull down resistor. Circuit is working well.
The maximam output current of LATCH in my circuit is about 44mA. which is enough to drive a 5v coil relay instead of LEDs which i want to do. But relay contacts not changing position . Relay type is dpdt i am currently using. Coil resistance is 129 ohms.
PLZ IF SOMEBODY CAN TELL, HOE CAN I DRIVE A RELAY ON THE OUTPUT OF A LATCH?
The purpose of this circuit is to turn SR latch on or off depending on the intensity of light falling on LDR. On the ouput of a latch i have connected LEDs through external pull up and pull down resistor. Circuit is working well.
The maximam output current of LATCH in my circuit is about 44mA. which is enough to drive a 5v coil relay instead of LEDs which i want to do. But relay contacts not changing position . Relay type is dpdt i am currently using. Coil resistance is 129 ohms.
PLZ IF SOMEBODY CAN TELL, HOE CAN I DRIVE A RELAY ON THE OUTPUT OF A LATCH?
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