Alan numitron clock
SNES Pi Webserver
USB Volume/USB toys
SNES Arcade cabinet
Game boy projects
Home Presence Detector
Rand Nerd Tut
Carnet du maker (fr)
ATmel blog (defunct)
Smokey amp vII
... continued from Smokey amp vI
20101103: worked on the amp tonight on a breadboard. Well, I understood a few more points, by testing and looking at other schemas of smokey-amp like (in the link section):
20101108: made version 2 on Friday evening. No cap on the input, but a ferrite. Is it a crime or something great (or just useless) ? Dunno. Put also a BIG FAT cap (470 uF) on the power rail and that's a killer : barely no more noise and sound is much more clean. Also important. this one has a gain control pot (10k, too big but I have nothing smaller currently) which is very good : full power you still have noise, but if you just lower it a bit, then bye bye noise and enjoy a clear sound that is plenty sufficient for playing at home on the sofa. Schema coming soon...
20101110: found some guy's comment on blueguitar.org. I copy the guy's comment on a separate page to keep it. Thanks for sharing, that will be most useful I guess.
20101118: well I tried many tricks, tried to implement many alternate Smokey amp like the Smokey Tone Amp of BeavisAudio, variations found on internet ... same : I've got lots of noise. A pot on the gain and a big cap between power rails make things better but no miracle here, I've still got lots of distortion and a background noise. Impossible to get a clear and clean noise.
20101128: it's not because sound is not perfect (hum hum ... far from it in fact) that I should not use it and case it into something. As you can see on the right hand picture, I cased it in a metal "hot lemon tea" can. The plug is in the top cap, and the speaker at the bottom. I tried to fix the speaker with nut and bolts, but to fix the nut to the speaker I soldered it but it didn't stay in place once a little force is applied. Maybe with an arc soldering tool I could, but nothing like that at home, so I will replace it with steel wires, should do the trick.
Only interresting stuff is that now - from power goes to the middle section of the 6.3 mm plug and goes back from the top (not the tip, the other side). Benefit ? Well, no need for a switch, if nothing is plugged in, the circuit is open and battery unused. Got the idea by seing a real SmokeyAmp once.
... continues on Smokey amp vIII
Version 2, with gain pot and tone control (useless)
Version 2, case into a metal can of hot lemon drink.
All content on this site is shared under the MIT licence (do what u want, don't sue me, hat tip appreciated)
electrogeek.cc ~ Formerly known as Kalshagar.wikispaces.com (AlanFromJapan [2009 - 2019])