All Questions
3
questions
0
votes
4
answers
440
views
Why is the LM7812 getting hot in this circuit?
I have made this circuit. It works fine with normal Zener diode, however when I replaced it with the LM7812 it works fine but as time passes the regulator keeps getting very hot although the load is ...
3
votes
1
answer
8k
views
How much power does LM7805 dissipate?
I'm using an LM7805 in voltage regulator mode.
Vin is 15V
Vout is 5V (regulated)
The attached load draws 200mA
How to calculate how much power the LM7805 would dissipate in this setup (and whether ...
- 193
3
votes
1
answer
534
views
LM7805 Voltage Drop too big
I setup the following circuit:
When I measure the voltage between GND and INPUT of the LM7805CV I have a voltage of 7.9V (around 8V as per power supply). But when I measure the output it is only 1.4V ...
- 297