EDIT: The BOM describes them as SC-60 chokes (another name for inductor), for which you can find a datasheet but no sign that they’re still made. Also, they’ve misplaced a µ in that datasheet, it seems. Not sure what exact component @lookmumnocomputer used, but pretty much any inductor of the right value (or larger?) should work here (e.g. search for “bourns 100 mh” and you’ll find a bunch, but there are many other manufacturers).
here’s where I got the inductor! probably an equivelent listing in your country
the reason I didnt add the second choke was because I removed the other filtering cap from the snare because it sounded better to me, the filtered one sounded naff, but then quickly realised it was then the same as the hi hat circuit.
Also another thing to note! try using the best caps you have lying around, anything none ceramic haha, you will yield better and also less noisy results, it seems quite important in this.
I will have a schematic of it tweaked to work happily in modular very soon also :).
if you are in the USA you can get them @ MOUSER electronics for 44 cents /a piece , the same style LMNC gets in the UK . the resistance of chokes and inductors is 1/R , and and yet has resistance just inversed in mhos not ohms .
another thing I thought id add! in a photo module im testing, Poly caps are better, infact any caps other than ceramic for the capacitors in the Twin T circuit! just a heads up.
less noise bleed, the ceramics are actually pretty dodge!
I wanted to say briefly that, in my experience, the “drum machine” only worked with the CD4011AE, had tried it with 3 different CD4011BE, and it didn’t work! I don’t know if this is already known, but I’ll just post it!
I found 4 sellers on eBay from Germany, Great Britain and Taiwan, in Germany where I live I paid 4 € including shipping for an RCA CD4011AE! Afterwards it worked like a charm, unfortunately not with BE!
I had tried different ones especially for the drum machine, they were: SGS HCF4093BE, HEF4011BP, Motorola 4011BCP and a China copy Texas Instruments CD4011BE … no reaction! It only worked for me with the CD4011AE from RCA! You might be lucky with the UBE, if you report so!
I have built the low bongo and clave with CD4011BE, but can only get sound out if I remove the resistors from the NAND outs. It’s pretty noisy too, the line between self oscillation and not is very fine, and getting close enough to make a passable sound still has some very slight oscillation. I think using a multi-turn pot might work better since 470k (I’m using 500k) is a very large range for a single turn.
Hello dear people,
someone might tell me how I can hear the snare sound, he had explained it in his video, but unfortunately my English is very bad, can you explain to me how I should patch noise out etc.? … Isn’t the L7805 the wrong way round?
There’s a lot of videos in this thread so not sure which part of which one you’re referring to, but the snare output is a mix of noise and bongo; from the article:
Hi Guys,
i’m sorry but i have to ask some stupid annoying beginner questions again!
Please take a quick look at the pictures, there are two questions for you!
Also the question, can I only play the high bongo or the snare or can I play both separately from each other? I put the “Noise Out” together with the “High Bongo” in my mixer / amplifier and thus get my snare sound, but then I no longer have a “High Bongo” available, unfortunately my noise sound is quite quiet, it can be in the video Snare more convincing, I think I’m doing something wrong!
)
. I wonder if the CD4011UBE will work 
