#1
so i've built the amp according to this pic ON A BREADBOARD



and here are the pics of my amp to help you guys troubleshoot


stolen from the bass unit of a speaker system


im pretty sure the rails that run left to right are all connected but why would they group them as 5 holes on top?

the top rail is connected to the postive terminal of the battery
the bottome rail is connected to the negative terminal of the battery

which terminal of the mono jack is + and - ?





im not getting any sound
my battery shorted
cant find the short
not sure if IC is correct position
not sure if caps are correct in terms of negative and positive terminals
not sure if the speaker is compatible
not sure if the far rails on both sides of the breadboard are all connected
not sure if the mono jack is wired correctly, not sure about + and - terminals
not sure if the negative lead from the speaker is supposed to connect to the left lug of the rheostat which is then grounded

as you can see, im quite the noob in this business. please help!!!

thanks in advance!!!
#3
Quote by Luxifer
please someone help!
Please don't bump your thread after a couple of hours like that. At least let it fall off the first page before bumping, k?


Look at the cap toward the right in the pic.

You have a blue wire from the positive rail to connection 40.
The cap appears to have BOTH terminals connected at 40
Then the negative rail is connected to 40

If it's as it appears in the pic, this is your short.
Meadows
Quote by Jackal58
I release my inner liberal every morning when I take a shit.
Quote by SK8RDUDE411
I wont be like those jerks who dedicate their beliefs to logic and reaosn.
#4
Quote by SomeoneYouKnew
Please don't bump your thread after a couple of hours like that. At least let it fall off the first page before bumping, k?


Look at the cap toward the right in the pic.

You have a blue wire from the positive rail to connection 40.
The cap appears to have BOTH terminals connected at 40
Then the negative rail is connected to 40

If it's as it appears in the pic, this is your short.


ok im really sorry! im just freaking out right now.

and yes, both the terminals of the cap is on 40. so i should move the + terminal to like say, 39 and keep the - on 40? the cap's terminal placement is correct tho right?

thanks a million!!!
#5
Quote by Luxifer
ok im really sorry! im just freaking out right now.
Yeah, but panic is bad.
Just relax and take whatever time is required to get it right.


Quote by Luxifer
and yes, both the terminals of the cap is on 40. so i should move the + terminal to like say, 39 and keep the - on 40? the cap's terminal placement is correct tho right?

thanks a million!!!
Yeah, or turn the cap totally sideways and have the numbers even farther apart. Or have it bridge right across the centerline of the breadboard (like the IC does), if the terminals on the cap are far enough apart.

Go over EVERY connection again and look for errors like that before powering up again, k?

The (-) of the cap is on the side with the arrow. You have that correct.

You're welcome.
Meadows
Quote by Jackal58
I release my inner liberal every morning when I take a shit.
Quote by SK8RDUDE411
I wont be like those jerks who dedicate their beliefs to logic and reaosn.
Last edited by SomeoneYouKnew at Jul 4, 2009,
#6
OMGZ MAN OMGZ MAN I WORKEDDDDDDD. I JUST FIXED THE CAP AND POPPED IN THE 9V TO THE SNAP HOLDER AND BANGGGGGGG ROCK AND ROLLL BABY!!!11 I LOVE YOU MAN!! THANKS SO MUCHHHHHH

yeah seriously, thank you! god i cant believe it actually worked lol

now that im doen the actual amp, im gonna add a blue indicater LED and an on/off toggle switch.

one question, right now, i have it connected to the 4R speaker. could i use the same +/- leads and connect it to a mono jack to attach to a cab? or would i have to use a stereo jack?

THANKS AGAIN!!!!!