I've used this board in a number of projects. The 2.1 claims 100w + 50w x2. So far I've been using a 19.4V (130 watt) laptop brick for power - 19.4V doesn't max the output but it does a job. Because I like recycling and I NEED to LEARN I've wondering if I can build a rudimentary out of the crap in my junk box.
I have a transformer from a BOSE Companion Series 5 - 18.5v (26v). BOSE claim the system is 300w but I'm guessing it's maybe 80-100VA?
I have a LVA10433 board from a JVC System.
Can I salvage enough parts to make rudimentary power supply?
I have a transformer from a BOSE Companion Series 5 - 18.5v (26v). BOSE claim the system is 300w but I'm guessing it's maybe 80-100VA?
I have a LVA10433 board from a JVC System.
Can I salvage enough parts to make rudimentary power supply?
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TBH if the laptop supply is giving you enough power why change?
If you need a more powerful supply and insist on building it then you need to be sure the transformer is large enough and that you are confident with mains wiring.
If you need a more powerful supply and insist on building it then you need to be sure the transformer is large enough and that you are confident with mains wiring.
At some point in your life you need to stop with the TV dinners and ready meals, learn to cook, even if it is just left-overs.
I wouldn´t.
Rated power in most Class D power amps comes at a voltage very close to absolute maximum (destructive) rating.
Example: TPA3118 puts out rated power with a 26VDC supply, but absolute maximum is 30VDC
If using an SMPS which is tightly regulated by design, no big deal, you will have those 26V (within 5% or better) at any load from zero to full overdriven output.
But in a conventional unregulated mains > transformer > diodes > caps supply, voltge from unloaded to dull can easily vary 15-20%
So you either have higher than 30V idle (dangerous) to guarantee 26V @ full load or you have safe 26V at idle but ghen quite a lot less than that at full load ... which will cut available power big time, and perform much worse than an SMPS.
Yes, "doable" ..... but what´s the point?
and w.t.h. is an LVA10433? 😉
"Salvaging"???
May be ... is any electrolytic there of a useful value?
Heatsink looks usable for a TDA2030 or LM1875 amp.
The rest?
Unusable dumpster quality stuff.