Build a solar radio

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turbogt16v

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Joined 2013
#1
Hello :cheers:

Can someone help with some suggestions and tips,and maybe even links,
on my build,

I am in process of buying the pieces to make small solar radio for beach.
radio New 9088 FM Tuner Radio Electronic DIY Components Kit SZSP13 | eBay

and solar 6V 3 5W 580 600mA Solar Panel USB Travel Battery Charger for iPhone 6 Cell Phone | eBay

These are just quick finds so i will buy different if better.I need help on figuring how much voltage ,Watts do i need on my panel for radio to work.
And is it possible to ad mp3 to play instead of radio when desired.
What trumpet do you suggest what values are good,and is it smart to build out of wood.

Thank you :cheers:
 
#5
#6
If you're going to use a mono speaker and a sparrow fart amp, then you may as well just use the solar radio posted above. If you're going to go to the trouble of building something then in my opinion it should perform better then something that you can buy for less.

I suggest you look for 12V battery, 12V amp, at least some nice 3" fullrange speakers, and in stereo.

look in this thread for inspiration (give yourself 2 weeks reading time)
http://www.diyaudio.com/forums/class-d/104402-boominator-another-stab-ultimate-party-machine.html
 
#7
I'd try a big filter cap across the panel, then a step-down switching regulator to 12v. Hopefully the cap will supply the power to handle the music peaks. PV panel would be a 2 or 5 watt nominal 12v, really about 20 volts no load, hence the switching regulator. Amp would be an efficient TA2024 or such.
 
#10
I say go for it.

🙂


You'll always get comments like that on the internet.
"Go bigger" "Make it louder" "build it like this"


You've obviously got a plan, an idea of what you want to build and I think you should stick to it.

Not everything has to be high-end HiFi.
Last time I checked, this was the DIY AUDIO forum, not the Audiophile Forum. 😉


I'll be watching this thread as I'm keen to venture in to the unknown world of solar power as well.



Keep things simple to begin with, build something basic and progress from there.
No matter how many things you build after this one and how good they are, this one will be the one you'll love the most!


🙂
 
#14
I build small amp units myself. The issue is getting good sound from tiny speakers..

I use 5 volt cell phone bank batteries, which will operate an amp and a blue tooth receiver. A cell phone with music or an MP3 player with a blue tooth transmitter eliminates the need for a volume control..

A simple charge circuit can be a LM7805 regulator and a small flexible solar panel. The regulator will handle up to 32 volts open circuit from the panel and regulate ~1 amp @ 5 volts on the output. Perfect for charging a bank battery..

Hack up a couple of USB cables and you're rockin'..
 
#15
i really like the idea that picowallspeaker said with 3.7W Class D Audio Amplifier
they are really cheap 1.5 dolars with pot,
and a question for OffGridKindaGuy what is common terminal on LM7805 ,can it be used
to pulse relay so i can use it as battery charger ragulator

and Dirty Vinylpusher it will ba small (relativ )
An externally hosted image should be here but it was not working when we last tested it.



and do any one know a god diy cheap buuit in antena sheme

good thing,i got mp3 module with remote working but damaged remote (little crack) and seller will refund,so almost for free
 
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#16
The common is ground. (Center Pin) Both commons from the battery and the panel would connect to this pin. It's a simple 5 volt regulator..

https://www.google.com/search?q=lm7805+pinout&rls=com.microsoft:en-US:IE-SearchBox&rlz=1I7TSNF_enUS461&tbm=isch&imgil=2nRvgjYOnvMcCM%253A%253BVMbMvstZH2lNSM%253Bhttp%25253A%25252F%25252Fimagearts.ryerson.ca%25252Fsdaniels%25252Fphyscomp%25252Ftutorials%25252Ft5vpower.html&source=iu&pf=m&fir=2nRvgjYOnvMcCM%253A%252CVMbMvstZH2lNSM%252C_&usg=__Uds48xLHM_oYDknDGFCAZ3lui3o%3D&biw=1138&bih=543&ved=0CCoQyjc&ei=NogWVa-wNY7joASh1ICIBA#imgrc=2nRvgjYOnvMcCM%253A%3BVMbMvstZH2lNSM%3Bhttp%253A%252F%252Fimagearts.ryerson.ca%252Fsdaniels%252Fphyscomp%252Fimages%252FVreg%252F7805pinout.gif%3Bhttp%253A%252F%252Fimagearts.ryerson.ca%252Fsdaniels%252Fphyscomp%252Ftutorials%252Ft5vpower.html%3B506%3B335

I use bank batteries because of simplicity. Supply them with a regulated 5 volt supply and they control the charge internally. The USB connection is pretty much universal which makes them flexible..

Those class D amps tear up FM broadcast receivers to the point of unusable, just so ya know.. 😉
 
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