tellMeDaBasix
Member level 1
lm7805
I have 12V step down transformer. This I connect to LM7805 or LM7809 after diode bridge.
I been using this setup for long long time to power microcontroller and other IC based circuit.
Recently, I connect DSL router that take 5V input to output of LM7805 and both LM7805 and transformer get very very hot.
Why LM7805 and transformer get very very hot when I connect to router but not other IC or microcontroller?
I have 12V step down transformer. This I connect to LM7805 or LM7809 after diode bridge.
I been using this setup for long long time to power microcontroller and other IC based circuit.
Recently, I connect DSL router that take 5V input to output of LM7805 and both LM7805 and transformer get very very hot.
Why LM7805 and transformer get very very hot when I connect to router but not other IC or microcontroller?