# \#2700 twin t drums **URL:** \ **Category:** KOSMO MODULES\ **Created:** [April 5, 2021, 2:37pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316 "2021-04-05T14:37:51Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [April 5, 2021, 2:37pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/1 "2021-04-05T14:37:51Z")
twin t’inspired by the practical electronics rhythm generator still needs a bit of fine tuning but I recon 3 weeks!!! keyboard sequencer is nearly done swell as the big mumma delay! PS ignore those preset potentiometers! meant to be the type in the other modules poking through the front but did not have the right values for this specific proto. !! this one definitely needs the whole thing doing with polyester capacitors or similar thats for sure. ![IMG_0590](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/d/da96473db57c57031d2f6d70eba3399479ddcac3.jpeg) ![IMG_0591](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/d/dcc7d699c90376389689e9f0d3043c9399348f7d.jpeg) Ok so the 4011UBE 's turned up that @fredrik asked to test. yes they do work however they do have more decay. If you drop the 4011UBE into the circuit as it is, the decay knob on max would cause the drums to oscillate, so in order for it to still be controllable to your liking with the preset potentiometers may I suggest to swap R2 150k R17 150k R32 150k R47 150k with a higher resistance, I think the best bet is 470k which will give the preset potentiometer plenty of travel for you to adjust the decay knob to your liking. ---
**Author:** ![Caustic](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/caustic/32/15588_2.png) [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)\ **Post date:** [April 5, 2021, 6:23pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/2 "2021-04-05T18:23:21Z")
Oh wow! This makes me very happy to see so soon. ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [April 5, 2021, 6:49pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/3 "2021-04-05T18:49:45Z")
it makes me think that there may be errors on the stripboard version that you put on your site, look here > [@Twin T Drums (Practical Electronics 1978)](https://lookmumnocomputer.discourse.group/t/twin-t-drums-practical-electronics-1978/3051/40): > > 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 Sn… ---
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [April 5, 2021, 7:50pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/4 "2021-04-05T19:50:31Z")
aaah yeah that isnt a mistake its just a reality of the strip board. because both the bongo and noise get put together then the noise bleeds into the bongo unless its plugged into a mixer. ill put it on that page too the stripboard layout stops before the signals get merged. it is just triggers in and separate outputs no mixing done on the layout ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [April 5, 2021, 10:06pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/5 "2021-04-05T22:06:00Z")
The orientation of transistor 7805 seems to me upside down, no ? EDIT : i see it in the other thread 🙂 ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [April 6, 2021, 5:31pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/6 "2021-04-06T17:31:18Z")
ooooh coool 🙂 [fill to 20] ---
**Author:** ![Sonosus](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/sonosus/32/13679_2.png) [@Sonosus](https://lookmumnocomputer.discourse.group/u/Sonosus)\ **Post date:** [April 6, 2021, 7:19pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/7 "2021-04-06T19:19:21Z")
Now this is just begging for a beatstep pro; I’ve been putting it off for ages seeing as I only had a few drum modules. Ahh well, might just have to… ---
**Author:** ![BratAttack](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/bratattack/32/14401_2.png) [@BratAttack](https://lookmumnocomputer.discourse.group/u/BratAttack)\ **Post date:** [April 7, 2021, 3:55am UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/8 "2021-04-07T03:55:48Z")
GAS is growing! 👍 👍 👍 👍 👍 ---
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [April 27, 2021, 7:13pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/9 "2021-04-27T19:13:47Z")
apologies on the delay on this!!! it needed a bit of messing about to make the best of it in kosmo town!! 2 weeks from now. Tiny bit more finessing on the snare drum, basically stepping it up a tad and boom!. btw in the vid the start is dry then just turned on the safety valve it was plugged into it should be quite soon after this the keyboard sequencer is up!! soz been a bit slow this past few months on modules but wanna get em right afterall ha. [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/c/4/c432657514afe7d4d7d637e5541b64047a81981c.jpeg "2700") ](https://www.youtube.com/watch?v=vBYc1mVSL1s) ---
**Author:** ![d42kn355](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/d42kn355/32/273_2.png) [@d42kn355](https://lookmumnocomputer.discourse.group/u/d42kn355)\ **Post date:** [April 27, 2021, 7:51pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/10 "2021-04-27T19:51:35Z")
[reeeeeeeeeeee](https://www.slanglang.net/reeee/) 😃 😃 😃 ---
**Author:** ![d42kn355](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/d42kn355/32/273_2.png) [@d42kn355](https://lookmumnocomputer.discourse.group/u/d42kn355)\ **Post date:** [April 28, 2021, 3:52pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/11 "2021-04-28T15:52:08Z")
lol - I love when people click my links. Reeee can also just be excitement btw. there was no intense rage hahaha. ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [April 28, 2021, 4:53pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/12 "2021-04-28T16:53:23Z")
keep reminding myself to get the new case done 🙂 ---
**Author:** ![Sonosus](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/sonosus/32/13679_2.png) [@Sonosus](https://lookmumnocomputer.discourse.group/u/Sonosus)\ **Post date:** [April 28, 2021, 5:50pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/13 "2021-04-28T17:50:35Z")
Aaa now I have to click it haha ---
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [May 12, 2021, 7:04pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/14 "2021-05-12T19:04:36Z")
just to let you know if all goes to plan this should be available from Monday more vids over tut weekend! ---
**Author:** ![CTorp](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/ctorp/32/15023_2.png) [@CTorp](https://lookmumnocomputer.discourse.group/u/CTorp)\ **Post date:** [May 12, 2021, 7:16pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/15 "2021-05-12T19:16:29Z")
Hell yes…let the modular drum adventure/addiction begin ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [May 13, 2021, 6:41am UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/16 "2021-05-13T06:41:52Z")
Ahh Super… Still need to build that case as nothing is set up. ---
**Author:** ![fredrik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fredrik/32/682_2.png) [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)\ **Post date:** [May 16, 2021, 5:48pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/17 "2021-05-16T17:48:00Z")
> **[\#2700 TWIN T DRUMMR](https://store.lookmumnocomputer.com/collections/modules/products/2700-twin-t-drummr)** > > This is the PCB and Panel set to build the #2700  TWIN T DRUMMER, A Twin T Drum module based on early organ drum voices, primarily the Rhythm Generator described in practical electronics early 1978. The info on this project is over here :-... ---
**Author:** ![Caustic](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/caustic/32/15588_2.png) [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)\ **Post date:** [May 16, 2021, 7:10pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/18 "2021-05-16T19:10:27Z")
Tail end of latest video has a demo! [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/1/2/12194b26cd1d86a0c489ed88e7900969dbef50d4.jpeg "Building A RELAY Sequencer For My Synth PART 2") ](https://www.youtube.com/watch?v=qep13jRYDxs) [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/c/4/c432657514afe7d4d7d637e5541b64047a81981c.jpeg "2700") ](https://www.youtube.com/watch?v=vBYc1mVSL1s) ---
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [May 16, 2021, 7:11pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/19 "2021-05-16T19:11:52Z")
just putting together the documentation! and schematic for peeps who wanna build it with other means! thanks to the eagle eyes :D. ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [May 16, 2021, 9:20pm UTC](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316/20 "2021-05-16T21:20:51Z")
order is in… ( twin t to 20 ) [Next page](https://lookmumnocomputer.discourse.group/t/2700-twin-t-drums/3316.md?page=2)