sush
Member level 4
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zener izmin
Hi,
I am trying to comapre 2 signal for which i have used Comaprator which has to work on 36 volts. The circuit is working fine giving me an output either 0volts or 29 volts. But this 29 volts is required to be changed to 5 volts for interfacing this signal with Microcontroller. I tried the shown diagram but due to zener leakage it gives 4.3 volts. If i replace it somtimes become 4.7volts (i.e. different zeners are giving different outputs) I think they are of low qualitity type. But can there be a better & accurate method for changing this signal from 29 volts to 5 volts. I cannot change the comparator supply voltage.
Thanks for reading this.
Hi,
I am trying to comapre 2 signal for which i have used Comaprator which has to work on 36 volts. The circuit is working fine giving me an output either 0volts or 29 volts. But this 29 volts is required to be changed to 5 volts for interfacing this signal with Microcontroller. I tried the shown diagram but due to zener leakage it gives 4.3 volts. If i replace it somtimes become 4.7volts (i.e. different zeners are giving different outputs) I think they are of low qualitity type. But can there be a better & accurate method for changing this signal from 29 volts to 5 volts. I cannot change the comparator supply voltage.
Thanks for reading this.