Adding Bluetooth

L

lhoffman3

New Member
Nice forum! It's been interesting browsing here and learning. My apologies if this has been covered before, but I didn't find anything doing a search.

I picked up a Realistic STA-21 recently, probably payed a bit more than I should have, but it just paired too nicely with some Realistic speakers I had been using to pass it up. Two of the three display lamps were done, but after replacing them with some LED lamps, it's in fine shape.

I've been running a Bluetooth receiver into the Aux input, and I'd like to move it inside the case. I've been using the little Drok boards for small projects, and their latest Bluetooth receiver will do the job nicely. It has an antenna jack so that I can get the signal inside the case, and needs DC 5-12V supply. Before I open it up and start poking around, I'd like to know if there are some obvious places to tap into DC voltage. I'm not totally unfamiliar with electronics, but I have little experience with receivers. I see in the manual there is one (!) IC, an LA-3350. Normally I'd look at the chip's Vcc, but I can't seem to find a pinout for it.

Does anyone have an idea where I might tap into some DC 5-12V?
 
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Well hello there!

You might want to be careful with just tapping in to some random "power source" in the unit.. I see you replaced the bulbs with LEDs. Usually the bulbs run from a separate channel off the transformer, which now also has some spare capacity. Because the LEDs use far les energy then the bulbs. So you could just put a little rectifier on that channel, and there's your powersource.

An alternative is to just put a little separate (switching) power supply in the unit, and hook the input of that power supply up to the "on" switch of the receiver. It's less elegant, but very simple to do.
 
Ever have one of those things in the back of your head that you remember from time to time that you have to take care of? For me, it was to thank you for your advice. So two months later, thank you! I plan to scrap a wall wart and install a dedicated power source inside the receiver.
 
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