Electronics > Beginners
I dont know how to wire this simple amp
Hextejas:
I am trying to hook my signal generator to a cheap. class D mono, amplifier.
The amp has 4 inputs.
1. VCC
2. In
3 Gnd
4 Gnd
and I hooked them like this:
1) VCC = +9v
2) In = 1khz test tone + lead
3) Gnd = -9v
4) Gnd = 1khz - lead
Is this correct and how come I cant hear anything ?
BergRD:
Silly question here, so please ignore, but have you hooked up the output to speaker(s)?
Just covering the bases here and KISS theory.
Hextejas:
Yes I did and not a silly question. The thing is that I had another el cheapo stereo amp and it was working until it stopped. Dont know why, I prolly fried something on it.
I swapped it out for this mono beauty. but no sound.
P_Doped:
1) Is the - terminal of your signal source floating or is it connected to earth ground?
Just wondering since you have both a -9V supply and the - terminal connected to the same potential on the board.
2) Do you know if the board can take a total of 18V between the VCC/Gnd pins?
3) If you measure the voltage between the VCC & Gnd pins, do you see 18V?
4) Do your 9V supplies have the ability to display their output current (could be 9V batteries, for all I know)? If so, what type of current are they showing?
5) What are the electrical characteristics of the speaker hooked up to the board?
Hextejas:
--- Quote from: P_Doped on August 31, 2018, 07:47:36 pm ---1) Is the - terminal of your signal source floating or is it connected to earth ground?
Just wondering since you have both a -9V supply and the - terminal connected to the same potential on the board.
2) Do you know if the board can take a total of 18V between the VCC/Gnd pins?
3) If you measure the voltage between the VCC & Gnd pins, do you see 18V?
4) Do your 9V supplies have the ability to display their output current (could be 9V batteries, for all I know)? If so, what type of current are they showing?
5) What are the electrical characteristics of the speaker hooked up to the board?
--- End quote ---
1) Is the - terminal of your signal source floating or is it connected to earth ground?
Its connected to one of the "Gnd" marked connections on the board.
Just wondering since you have both a -9V supply and the - terminal connected to the same potential on the board.
2) Do you know if the board can take a total of 18V between the VCC/Gnd pins?
Dont know
3) If you measure the voltage between the VCC & Gnd pins, do you see 18V?
I will check
4) Do your 9V supplies have the ability to display their output current (could be 9V batteries, for all I know)? If so, what type of current are they showing?
It is a 9v battery
5) What are the electrical characteristics of the speaker hooked up to the board?
[/quote]
I think that they are an 8ohm desktop style speaker, but I will look more closely tomorrow.
Navigation
[0] Message Index
[#] Next page
Go to full version