Dear all,
Hi to all,
My query is, I am using 24 volt smps to power my board having few relays, led displays, microcontroller and other passive components. I am using 7805 to power microcontroller and 7812 to operate relays. But while in working condition 7805 and 7812 are getting to hot because out of 24 volt input 12 volt is dissipated in regulator ic. To avoid the heating of ic I have connected resistor in series to load to drop 12v across it but now resistor is getting to hot not regulator ics. I have tried resistors of different values up to 10watt, still resistor is getting to hot. My board load current is 100mA.
Please try to suggest efficient solution for my problem
Hi to all,
My query is, I am using 24 volt smps to power my board having few relays, led displays, microcontroller and other passive components. I am using 7805 to power microcontroller and 7812 to operate relays. But while in working condition 7805 and 7812 are getting to hot because out of 24 volt input 12 volt is dissipated in regulator ic. To avoid the heating of ic I have connected resistor in series to load to drop 12v across it but now resistor is getting to hot not regulator ics. I have tried resistors of different values up to 10watt, still resistor is getting to hot. My board load current is 100mA.
Please try to suggest efficient solution for my problem