tried building one of the 'less component' ones off the web and found it noisy and even picked up a radio station

I built this one and it's silent.. works a charm...

simple, fast build.. did it dead bug style..

thanks Mictester.. much appreciation!

thanks again.. yeah, plan has always been to box them (this is a drummer we're talking about, best it be built to take the knocks )... just testing in my hands for now and I think I'm acting the part of a pretty good antenna! shielding will defo be part of the final plan...

most excellent.. thanks a heap. plan is to whack together a dead bug (to 8 pin socket) of mictester's lm386 cos... no etching or cutting board, heh. I put together a simpler one last night and it works a treat, but picks up radio and is a lil noisy.. hoping MT's is clearer... cheers!

I'm looking at building a headphone amp for our drummer (personal monitoring).. would this be suitable or is it more 'guitar oriented'?.. I was just gonna take an aux feed from the 'thru' of a powered monitor speaker... :popcorn: Take a look at the TDA2822M. It's a dual 1W amp chip in a DIP8 packag...

hmm.. thanks.. it just went past my level of understanding :oops: I may just use an lm386 amp like MicTesters. in a similar chase of 'free-lunch' ... I'm hoping to use a couple of rechargable AAA batteries. that'd be a grand total of 2.4V.. I have googled "max1044 calculator" (and 7660 cal...

thank you sir. so what voltage are we looking at?

I'm looking at building a headphone amp for our drummer (personal monitoring).. would this be suitable or is it more 'guitar oriented'?.. I was just gonna take an aux feed from the 'thru' of a powered monitor speaker...

Actually, if I had to use discrete transistors as a buffer after an opamp, I would use a diamond follower (resistor biased). It uses 4 transistors instead of 2, but it is a perfect design. Do you happen to have a working example (that could be used as a headphone amp), looks interesting and could b...

I agree Darkrain, 9V would mean that the cathodes of the valve aren't able to reach their full electron-emission capabilities, also, I seem to remember reading somewhere that if you run a valve at a lower heater voltage, it can lead to something called "Cathode Poisoning", incidentaly, I ...

what is it, and what does it do?
got schematic?

Atreidesheir posted before http://www.instructables.com/id/Micro-Drill-Press/ The point is, you need more room, like the example above or like a sewer machine :idea: you might, but I don't :wink: the link above is actually what inspired me (I'd been asking work colleagues if they had any old micros...

thanks.. I've already ordered a piezo, but until that arrives.. I have a speaker, heh.

sweet.. I was wondering so thank you!
so a buffer on each would sort that out?

dredge. so, I'm looking at making a stompbox.. a proper one.. I have a wee looper, and I play acoustic guitar into it. I want to hook up a car speaker to a piece of plywood so I can thump my foot on it to get a 'drum' beat kinda sound. I am thinking I'll stick an input jack on the thing that the gui...

soooo cute and tiny.. makes all my 1590a pedals look like whales. prolly zero chance of anyone tracing it, but I've take gutshots to show the majesty of the engineering. review? well initially I hooked up an external battery (Specs say it only draws 37mv so should have been sweet) but in retrospect ...

thought it time for an update since I just added a tuner to the board. picked up the polytune noir for a fair price so had to attach that to the board. I kicked off the tremolo cos it just doesn't get any use when I gig. I've also since added a clock into the thing cos I never wear a watch and never...

IvIark wrote:Or do what they did in the Hot Cake and put an 8V2 zener between supply and ground.

my hotcake was still fizzy as hell.. did not like .. which is weird cos I like hot.. and I love cake.

chicago_mike wrote:It's two envelope filters

I have a LOT more photos to post.

I'll warm up my thanking hand...










... *cough* .. I said "THanking" ..*cough*

welcome to the forum bondieffects. have a nosey round this place, it's a wealth of knowledge, you'll also find several pleas from various builders with the same concern. the response is overwhelmingly "if a hobby site posting schematics is going to stop you feeding your family, you're in the wr...

have you tried a different pt2399?