Electronics > Beginners
I dont know how to wire this simple amp
6PTsocket:
That doesn't sound like a big job. Pin 3 is V- on the IC. Just cut the land and bring out a wire from pin 3. It is probably best that he just use a speaker cap and single ended supply. The data sheet says 2200 mfd but if he does not need low end response it can be smaller.
--- Quote from: oPossum on September 04, 2018, 05:12:45 am ---I have that exact board. The two ground pins are both connected to the ground plane. It would have to be modded to run with split supplies.
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Zero999:
But why would you want to modify it to work on a split rail?
Also note that, yes it's true that most ICs will work outside their specifications, but not all will work or be reliable: it's uncharted territory. Another thing is it might work from a 9V bench supply, which has a very low impedance, but a 9V battery is another matter. It might work from a 9V battery for a short length of time, have a distorted output or not at all.
Richard Crowley:
Note that the standard PP3 size battery has the LEAST capacity of any commonly available battery/cell.
While they have the nominal 9V rating, they have a very low current/power rating because they are made from six AAAA cells (or equivalent).
The TDA2030 was never designed to operate from such a low-capacity power source.
Certainly there ARE power amp chips that ARE designed to operate from 9V batteries.
Ref: https://en.wikipedia.org/wiki/Nine-volt_battery
tooki:
--- Quote from: 6PTsocket on September 04, 2018, 02:19:30 pm ---That doesn't sound like a big job. Pin 3 is V- on the IC. Just cut the land and bring out a wire from pin 3. It is probably best that he just use a speaker cap and single ended supply. The data sheet says 2200 mfd but if he does not need low end response it can be smaller.
--- Quote from: oPossum on September 04, 2018, 05:12:45 am ---I have that exact board. The two ground pins are both connected to the ground plane. It would have to be modded to run with split supplies.
--- End quote ---
Sent from my SM-G900V using Tapatalk
--- End quote ---
Why are you so hell-bent on him using the split supply? There’s no compelling reason to do so, especially not since it requires modifying the PCB. And why do you assume the PCB doesn’t already have the speaker cap? It’s a finished amp board, not a bare IC breakout board!
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