Hi guys, I have found 2 circuit boards and I want to make a guitar amp from them, how do I connect to 2 together?? Any wiring diagram that can help???

 

Do you have product links to the boards that you found? I don't think the TDA2030 needs a preamp, but you may want to use a buffer between the guitar and the TDA2030. An NE5532 is probably not the best option for buffering.

https://forum.allaboutcircuits.com/...-ne5532-preamp-board-to-a-tda2030-amp.144946/

 

Hi
https://m.ebay.co.uk/itm/NE5532-Ste...608712?hash=item4412686948:g:x08AAOSwx2dYJei~

And

https://m.ebay.co.uk/itm/2x18W-TDA2...158689&hash=item41d3c86ad6:g:zrgAAOSwBkRaAwHU

These are both boards from eBay,
Does this help??
Matt

 

If the Ebay descriptions are to be believed the NE5532 board requires a dual power supply and the TDA board requires a single supply. I think you should look for some other boards that have matching power supply requirements. That will be much easier.

 

So are both boards useless as a guitar amp? Neither will work?

 

I think that the guitar straight into the TDA board might work. But:
- maybe the input resistance is not high enough, which would attenuate high frequencies. I can't tell from the Ebay description.
- It's a stereo amplifier. What are you going to do with the other channel?
- The tone control is likely a "normal" audio tone control which is not great for guitar.
- You may need to boost the guitar signal a little before going into the TDA board.
But I think it will work. If you can spare £3.48 for an experiment that may not turn out as great as you imagined, go for it! The first and last point from the list above can be fixed later by adding buffer/booster between your guitar and the TDA.

What kind of speaker do you intend to drive?

 

I have a 10 inch 100w speaker, what buffer do I need?
Matt

 

Am I better off with something like this??

https://m.ebay.co.uk/itm/Velleman-K...036054&hash=item58c4dcf811:g:5woAAOSwgkRVVH4E

 

If you only have one speaker to drive you don't need a stereo amplifier. But you can use a stereo amp and just use one channel. At the very least you will want a volume control and that Velleman kit doesn't have one. You can add one yourself with some extra components if you feel comfortable with doing that.

Here is an example of a buffer to get the idea:
http://www.generalguitargadgets.com/effects-projects/boosters/buffer-ic/
You may not need it, only testing will tell. One more thing, that buffer wants 9V DC (maybe a bit low for that IC) and the Velleman kit wants 25-30V AC. You'll need to think about what you want to use as a power supply.

Here's a mono amplifier with volume control. It requires DC power so will be easier to combine with a buffer circuit in case you want one.
https://www.ebay.co.uk/itm/DC-12-24...279688?hash=item212a47f548:g:bHYAAOSwmNlZZeL8

 

Wow that’s great, if I stick with the tda2030a board I have will the buffer be needed? I wanted a guitar amp with tone and base on it, but looks like I completely missed the mark with those 2 boards I have,

 

If you already have the TDA2030 board I would try the guitar signal straight on the input of the board. If you like the sound then all is fine, but if you think high frequencies are missing from the sound a buffer could fix that. If you use a short guitar cable there might not be a problem at all. Give it a shot and trust your ears

 

You have been fantastic thank you,