eldermalagon
New Member
Hi everybody.
I´m trying to supply a circuit that requires only 500ma and I have a 24v switching power supply as input to the 7805. The thing is that I have a couple of detectors that are supplied with 24v and they have a single 7805 without heatsink and the 7805 does not get hot at all!!! but when I try to power mine with 24v it gets very hot and over time the output decreases. I would like to know if any of you have a suggestion or idea for preventing this and proper supply the 7805 with 24v.
I´ve noticed that some circuits have a small value resistance in series with the input of the IC, I´ve tried this also but the resistance gets hot too! if any of you have a circuit will be fine, o an idea to do this.
I´m trying to supply a circuit that requires only 500ma and I have a 24v switching power supply as input to the 7805. The thing is that I have a couple of detectors that are supplied with 24v and they have a single 7805 without heatsink and the 7805 does not get hot at all!!! but when I try to power mine with 24v it gets very hot and over time the output decreases. I would like to know if any of you have a suggestion or idea for preventing this and proper supply the 7805 with 24v.
I´ve noticed that some circuits have a small value resistance in series with the input of the IC, I´ve tried this also but the resistance gets hot too! if any of you have a circuit will be fine, o an idea to do this.