Electro Tech,
I'm using a 120VAC to 9VAC 1A wall transformer, a full wave
bridge and a 7805 regulator for my 5 volt supply. There's
a 1000uf cap on the input of the regulator and a 220uf
on the output. This yields 4.96 to 5 volts.
As soon as I start to add devices to my board the 5 volts
starts to sag. With just one LMC555N the voltage drops
to 4.4 or 4.6 volts.
I think I have ample grounds and there's a 1uf cap on
the supply pin of the 555. The only other thing I have
on the board right now is an led for a power indicator.
I'm measuring the voltage with a Radio Shack digital
multimeter.
Am I missing something here?
jerryd
I'm using a 120VAC to 9VAC 1A wall transformer, a full wave
bridge and a 7805 regulator for my 5 volt supply. There's
a 1000uf cap on the input of the regulator and a 220uf
on the output. This yields 4.96 to 5 volts.
As soon as I start to add devices to my board the 5 volts
starts to sag. With just one LMC555N the voltage drops
to 4.4 or 4.6 volts.
I think I have ample grounds and there's a 1uf cap on
the supply pin of the 555. The only other thing I have
on the board right now is an led for a power indicator.
I'm measuring the voltage with a Radio Shack digital
multimeter.
Am I missing something here?
jerryd