Wise Old Owl
Didn't want to hijack the other thread, so continuing here.
So are you working on a project? Audio stuff?
Did you buy a signal generator also?
yah better here....
well, some audio projects alright, making some small amplifiers for experimenting and causal listening purposes. but noh, didn't buy and signal generator, for audio its not very important at this moment, i can just play 1khz sine wave audio files to find where audio is clipping, and how clean it is.
but i have a signal gen in my purchase list, the lab bench ones are rather expensive, and these look better suite the hobby purpose :
AD9850 DDS Signal Generator Module 0 40MHz | eBay
AD9850 DDS DSP Signal Generator Module 0 40MHz Sine Wave FOR Arduinor KG208 | eBay
and yah for audio, made a 2 mobile amps, one with lm386 another with tda2822m : it was difficult to construct just by reading datasheet, had to go through multiple breadboard and veroboard prototypes, then had to watch videos and had to consult the experienced on youtube. finally after some nightmares, they are giving reasonably nice and clean sound. the tda2822m is still giving slight no signal hiss, but that ic has big gain and i m using ic base, so..... (blew up 2x tds2822m to get the 3rd one work nicely).
here are the pics, please pardon the green marker ink on pcb, just had to paint to avoid corrosion. u will probably wont be able to see tracks because of the ink, but i kinda tried my best for a star ground layout. also had to modify those input caps for make them work and for tuning into best suitable bass.
TDA2822M on left and LM386 on right. TDA2822M > LM386 for sound quality any day. but LM386 has sturdier build quality & doesn't fail so easily.
(click to zoom)
also, worked on an another project, to build a charge controller, to charge a 6v lead acid from my 5w solar panel.
and currently working on arduino remote weather station project (well working on it from last winter lol), on 433MHz modules, it works, but i am still working to make it better. will share pics when completes a bit more.
and also bought a vire usbfm remote kit @Rs.105/-& and a couple of TDA2003 audio amp ics to build a neat audio listening gear.