Dear all,
I have experience with ULN2004 with 24V supply & 24V input & its working fine. But I'm not sure whether its a right way or not. If you look at the datasheet, the input allowable range varies with respect to collector current. Hardly my collector current will not go above 100mA & as per the datasheet electrical characteristics the maximum allowable input voltage for collector current of 125mA is 5V. Even though its working for 24V input voltage, I'm afraid to go with this design for long run.
The different between ULN2003 & ULN2004 id the base resistor. So the base resistor value is directly proportional to the given input voltage. That is the reason , I want to know what value exactly I need to add at the input for given 24V input?
Regards
Udhay