C
Charlie E.
- Jan 1, 1970
- 0
Hi All!
Ok, at my wits end, because I am afraid I just wasted $250 on a pcb
that isn't going to work. However, I am hoping one of ya'll can give
me some insight!
I am building a small board that has speech output. It goes through
two stages of an MCP6024 for a four stage audio filter, and then to a
power amp.
My hand build proto worked fine, as does the original circuit I
'borrowed' the circuit from. But, when I power this guy up, he sings
like a canary. The new circuit is all surface mount, SOIC and 0805
parts. All the passives are mounted with in an inch of the opamp, and
I have a full pour of ground on the bottom and VCC on the top.
I found one component error (when ordering a 4.7nF cap, I actually
ordered a 47nF cap...) but I had a TH part of the same value I have
tacked in its place. This didn't effect the problem, though.
So, any ideas on trouble shooting this? Before the boss shoots me????
Thanks,
Charlie
Ok, at my wits end, because I am afraid I just wasted $250 on a pcb
that isn't going to work. However, I am hoping one of ya'll can give
me some insight!
I am building a small board that has speech output. It goes through
two stages of an MCP6024 for a four stage audio filter, and then to a
power amp.
My hand build proto worked fine, as does the original circuit I
'borrowed' the circuit from. But, when I power this guy up, he sings
like a canary. The new circuit is all surface mount, SOIC and 0805
parts. All the passives are mounted with in an inch of the opamp, and
I have a full pour of ground on the bottom and VCC on the top.
I found one component error (when ordering a 4.7nF cap, I actually
ordered a 47nF cap...) but I had a TH part of the same value I have
tacked in its place. This didn't effect the problem, though.
So, any ideas on trouble shooting this? Before the boss shoots me????
Thanks,
Charlie