The found schematics for 2822M are slightly different from 2822. The 2822M has the input applied to the center of the volume control such that it grounds the source device when volume is reduced. Is this a mistake or there some sensible reason for this configuration.
Attachments
File 'bridge1.png' is factory style. File "BTL1.png" is drawn by one of the "1,001 Circuits!" websites.
The "backward potentiometer" connection is a useful design technique in some cases. But these days it is mostly a screw-up.
Does the factory datasheet have a plan with a volume control? Yes, TWO.
Yes, I see the other typo in the caption at "Motot". I can believe they have people who read schematics carefully but the English expert was on vacation that day.
The "backward potentiometer" connection is a useful design technique in some cases. But these days it is mostly a screw-up.
Does the factory datasheet have a plan with a volume control? Yes, TWO.
Yes, I see the other typo in the caption at "Motot". I can believe they have people who read schematics carefully but the English expert was on vacation that day.
Probably a mistake. It only makes sense when it is part of some larger circuit where the output of the previous stage behaves as a current source.
It seems that the TDA chip amps are all obsolete according to:-
https://electro-dan.co.uk/electronics/LM1875.aspx
So I am considering LM380 - LM384
https://electro-dan.co.uk/electronics/LM1875.aspx
So I am considering LM380 - LM384