milan.rajik
Banned
How Can I connect a Bi Color LED to a Relay interfacing circuit ?
The LED is 3 pin type. LED rating required is 10 mA, 2.1V. The relay is driven by a opto and BC337. Opto's output collector is connected to 5V and emitter is connected to a Voltage divider which divides the voltage to 4.2V and 0.8V. The 0.8 V biases the BC337 BE junction. The LED has to turn RED when opto is not ON and Green LED should turn when Opto is ON.
The LED is 3 pin type. LED rating required is 10 mA, 2.1V. The relay is driven by a opto and BC337. Opto's output collector is connected to 5V and emitter is connected to a Voltage divider which divides the voltage to 4.2V and 0.8V. The 0.8 V biases the BC337 BE junction. The LED has to turn RED when opto is not ON and Green LED should turn when Opto is ON.