Smallest amp ever?
- allesz
- Cap Cooler
I had bad luck recently on my mission to build an overdrive capable of driving a speaker too:https://www.freestompboxes.org/viewtopic.php?f=2&t=8239
For this kind of thing I think I will go back to lm386 (any alternative someone?).
Anyway I built this: it is so simple and stripped down it makes you laugh... but it works great and gives a good clean sound too; no distortion was available on this IC, but the volume is very good, maybe louder than lm386.
It is now my new practice amp, I built it inside a carboard box with four small speakers (two from an old laptop and two from... I can't remember) the battery is held in place by some tape inside the "cab".
For this kind of thing I think I will go back to lm386 (any alternative someone?).
Anyway I built this: it is so simple and stripped down it makes you laugh... but it works great and gives a good clean sound too; no distortion was available on this IC, but the volume is very good, maybe louder than lm386.
It is now my new practice amp, I built it inside a carboard box with four small speakers (two from an old laptop and two from... I can't remember) the battery is held in place by some tape inside the "cab".
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- nano amp.bmp (337.55 KiB) Viewed 1560 times
- allesz
- Cap Cooler
Hallo lolbou, I noticed you changed your public image; did you recently had a baby? If so congratulation.
Yes, I power the amp with a 9V battery, but you can go as low as 3V according the datasheet. I have no idea of current draw, the datasheet don't give any direct information about it and I don't know a way to find it out by myself.
I only use it for praticing on the couch by night (the volume is quite loud when wife and babies are sleeping, so you will have to roll down a bit the guitar volume or the overdrive output) and I expect a single battery to last long (a couple of month maybe).
Yes, I power the amp with a 9V battery, but you can go as low as 3V according the datasheet. I have no idea of current draw, the datasheet don't give any direct information about it and I don't know a way to find it out by myself.
I only use it for praticing on the couch by night (the volume is quite loud when wife and babies are sleeping, so you will have to roll down a bit the guitar volume or the overdrive output) and I expect a single battery to last long (a couple of month maybe).
- lolbou
- Old Solderhand
Yes indeed, thanks!allesz wrote:Hallo lolbou, I noticed you changed your public image; did you recently had a baby? If so congratulation.
I should have gieven a look at it... But I guess you could place an ammeter in series between the 9V and the pin 1 and send a sine wave to estimate the average draw...allesz wrote:I have no idea of current draw, the datasheet don't give any direct information about it and I don't know a way to find it out by myself.
I have a TDA8941P from an old TV here and would like to try it, for guitar or iPod, I don't know...
The input imedance is quite low for a guitar, did you try it using a buffer to notice difference in sound?
- Are you a mod or a rocker?
- Uh, no, I'm a mocker.
- Uh, no, I'm a mocker.
- allesz
- Cap Cooler
Buffer.... well (they are misterious thing to me), I use the thing mostly by itself, but sometimes with a booster-driver made by me: https://www.freestompboxes.org/viewtopic.php?f=13&t=7806; even if it is not a proper buffer I have to say that the sound does not change too much in term of volume/quality.
Compared to lm386 this IC gives you less flexibility in terms of sound, but it seems more clean, stable and reliable, and the one sound it gives is a good one.
TDA8941P seems similar to the tda7052... but it has a couple of pin I don't understand. It could be a good amp for music too (maybe the input cap can get bigger in that case) but it is a mono chip.
Compared to lm386 this IC gives you less flexibility in terms of sound, but it seems more clean, stable and reliable, and the one sound it gives is a good one.
TDA8941P seems similar to the tda7052... but it has a couple of pin I don't understand. It could be a good amp for music too (maybe the input cap can get bigger in that case) but it is a mono chip.
- allesz
- Cap Cooler
Yesterday I changed the first battery on the amp, the sound was getting more and more distorted and the volume was going down...
I used it quite a lot jamming almost daily on my couch with just an overdrive (boss od3, dod metal maniac, tube screamer and some other things made by myself) and sometimes a delay pedal.
So the power consumption seems to be on the low side... I think this thing will follow me on holiday
I used it quite a lot jamming almost daily on my couch with just an overdrive (boss od3, dod metal maniac, tube screamer and some other things made by myself) and sometimes a delay pedal.
So the power consumption seems to be on the low side... I think this thing will follow me on holiday