interface 24v to microcontroller

[kavya]

in my project I have to interface more than ten 24v line to microcontroller as inputs.. how can I do this.. for time being I am using 7805 .. is there any multi-input multi-otput voltage regaluator which takes 24v input and provide 4-5v output..

 

as I searched I got information about IC mc1489  with 4 IO.. but this is rs232 to ttl convertor..

 

please suggest me how to do this

 

thanks in advance

[Ashutosh Bhatt]

what you want to do actually?

do u want to sense analog DC voltage? like 0-24V?

if its so then its very simple.

u can use voltage divider and ADC.

select any ADC that has input analog input range of 0-10 V or 0 – 12 V

using voltage divider convert your 24 V in to analog input range of ADC

thats all

now you will get digital equivlent output of your 0 – 24 V input 

 

[kavya]

i want to connect 24v signal to a single input lines of microcontroller..

 

there are around 30 lines with voltage level at 24v.. 

[SHAH DISHANT H.]

Hi,

 

You can use relay for this purpose..

 

Which controller you are using ?

 

Relay will solve your question…

[kavya]

i want to connect output of 24v dc relays as input to microcontroller

 

i am using atmega2560

[moeen]

 simple .. use optocoupler ic ( *as per it datasheet) with it for signal to MCU.

 

[Author]

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