Digital design of inlet 24 volts to 5 volts dc

[masoud1234]

Hi
I need circuit 24v dc to 5 v dc for digital input plc .I want use optocoupler TL21 Please help me.
I want an input module with 24 volts to optocoupler, when the output voltage is 5 volts optocoupler be active in micro be used for input


input 24v dc optocoupler TL21 OUTPUT 5V DV T0 INPUT MICRO AVR

 

[sky_123]

You don't always need an optocoupler, you could use a potential divider circuit.
For example, this circuit is for 12V to 5V.

 

[masoud1234]

thanks but I need a circuit 24v to 5v with optocoupler,like digital input plc

 

[sky_123]

Is TL21 an obsolete part or something?! I can't find it..

 

[rfredel]

Hello masoud1234,

here you see the circuit of a levelshifter with optocoupler.



Regards

Rainer

 

[masoud1234]

thanks from your circuit