# Circuit Benders Corner **URL:** \ **Category:** DIY STUFF\ **Created:** [January 20, 2020, 7:11pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58 "2020-01-20T19:11:50Z")\ **Posts on this page:** 20\ **Page:** 3
**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:** [December 3, 2020, 11:47am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/41 "2020-12-03T11:47:17Z")
A Mechanical loop with motor hack (1 or 2 notes) ridiculous but fun ! ![Clavier vert mecanik loop bending (1)](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/a/a12df1615ea96b119fb52929e7adbfdb0492032e.jpeg) > **[CLAVIER VERT MECANIK LOOP BENDING - Vidéo Dailymotion](https://www.dailymotion.com/video/x714w1p)** > > Circuit bending d'un jouet clavier, avec une loop mécanique avec le détournement du moteurDIYhttps://soundbender36.wordpress.com/ A note on the keyboard triggers the motor and the motor restarts the note and go. ![Clavier vert mecanik loop bending (2)](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/c/c4cd1964444c36e5632a07eef328dfbbd93ea3f6.jpeg) ---
**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:** [January 5, 2021, 9:23am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/42 "2021-01-05T09:23:54Z")
Le GRESILLOPHONE ![Grésillophone (1)](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/b/beaf5ebc0d2814f26804798774f27cf4077fc7be.jpeg) ![Grésillophone (2)](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/e/e58d694013f3dbeabd35538c96801879c9cbc0a1.jpeg) > **[GRESILLOPHONE - Vidéo Dailymotion](https://www.dailymotion.com/video/x6eu833)** > > Circuit bending - jouet téléphone DIYhttps://soundbender36.wordpress.com/ GGGRRRZZZZ ! ---
**Author:** ![willow2x](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/willow2x/32/5343_2.png) [@willow2x](https://lookmumnocomputer.discourse.group/u/willow2x)\ **Post date:** [May 8, 2021, 10:33pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/43 "2021-05-08T22:33:01Z")
Bit of a thread necro, but I fancy a distraction and some learning of the ish I should already know would be good. I picked up a toy for £1 from a charity shop. Its got plenty of buttons and things to tinker with. But rather than annoy the house ill be kind. I want to add a line out with a thonk jack, so that I can plug in some headphones and interrupt the speaker, perhaps a volume control too if I feel ‘fancy’ My brain isnt logic’ing properly at the moment. I know its simple and I should perhaps just ‘DBSTTI’ as Sam would say =) ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [May 8, 2021, 11:11pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/44 "2021-05-08T23:11:24Z")
[![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/2/e/2e0f9e2683bedffd84f2e27c72f1a04da8db0637.jpeg "Audio Output Anything") ](https://www.youtube.com/watch?v=N_-GgCgtOk0) ---
**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\ **Post date:** [May 9, 2021, 1:23am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/45 "2021-05-09T01:23:01Z")
magpie is insanely awesome ! " and I have never broken anything " ---
**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:** [May 9, 2021, 9:18am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/46 "2021-05-09T09:18:53Z")
It’s also good to add a resistor between tip and sleeve jack (8 or 10 R depend of the value of your speaker) And if you want to keep the speaker, you need a switch jack (The Magpie don’t do that on his vid’) Add a simple attenuator schematic pot for level out. You know how to find the pitch resistor to hack it with a pot ? (if it’s an old toy with “true” resistor, not possible with a black blob) ---
**Author:** ![willow2x](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/willow2x/32/5343_2.png) [@willow2x](https://lookmumnocomputer.discourse.group/u/willow2x)\ **Post date:** [May 9, 2021, 11:50am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/47 "2021-05-09T11:50:54Z")
Ive got some 10r left still (only about 80 ;D) I think the Thonkiconns I have are switching (3 poles off a mono jack) Ive cut the + line on the spkr ready for modding. Then I got distracted taking the toy apart so I can tinker n poke about easier. By then it was 2am. My guess for hooking up the spkr is; Spkr + line goes to the ‘switch’, the spkr out line (from pcb) goes to tip, sleeve goes to gnd? Ill post a pic of the toy later on, but yes there is a dreaded black blob, but there are a bunch of resistors, diodes, caps and perhaps a clock crystal covered in hot glue. Theres some interesting bits on it for a £1 find to be fair. Even if its not bendable, I got my moneys worth in switches and triggers. ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [May 9, 2021, 12:45pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/48 "2021-05-09T12:45:52Z")
> [@Dud](#): > > not possible with a black blob I know you’ve bent a megaphone that has what I’d call a black blob but does have an accessible through hole pitch resistor — so maybe I’m misunderstanding. Anyway, an encased sound chip does not imply you can’t do the pitch resistor bend. I’ve only tried bending a few things, and I’ve seen some toys where the pitch resistor is between two sound chip pins (like that megaphone), but I’ve also seen at least one where it’s between one sound chip pin and Vcc. There it appeared the chip speed was governed by a current controlled oscillator. If I changed the resistor the speed changed but also if I replaced Vcc with a different voltage it changed. Which means for a toy like that you can do voltage controlled pitch changes without a vactrol. ---
**Author:** ![Plop](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/plop/32/11707_2.png) [@Plop](https://lookmumnocomputer.discourse.group/u/Plop)\ **Post date:** [August 1, 2021, 2:11pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/49 "2021-08-01T14:11:21Z")
An overview of my bend’s toy collection 🙂 [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/1/14aadb97fccab3a9e07485179d468f8b8ddf05fd.jpeg "Bonjour bonjour") ](https://www.youtube.com/watch?v=7iKv804OWak) It’s the first time i can play with them all together, i have other one but my mixer only have 4channels 😕 @Dud Did you have any tips and trick for circuit bending ? Where did you found youre toys ? For toys with black blob i just use my finger and saliva and put it anywhere i can until i hear a good noise/effect; i saw this technic in this book : [https://www.nicolascollins.com/texts/originalhackingmanual.pdf](https://www.nicolascollins.com/texts/originalhackingmanual.pdf) This one is the original text, i have the second edition in paper book ---
**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:** [August 1, 2021, 3:52pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/50 "2021-08-01T15:52:39Z")
> [@Plop](#): > > Did you have any tips and trick for circuit bending ? Nothing revolutionary, often in a circuit bend toy i added pitch down/up, a reset button (when sometime some glitch make stop the machine), glitch if possible, jack out with volume pot, and often an LFO with vactrol on pitch pot, some of them are controllable by external sources (trigger or cv), and some have also a filter inside (MS20clone) > [@Plop](#): > > Where did you found youre toys ? the best I think is the flea market and garage sale > [@Plop](#): > > For toys with black blob i just use my finger and saliva Not only for black blobs, for all toys, it is “the basis” of the circuit bending 😅 There are some infos on my [blog](https://soundbender36.wordpress.com/) that may be of interest to you. If you have questions, do not hesitate ---
**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:** [August 4, 2021, 8:01am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/51 "2021-08-04T08:01:50Z")
> [@Plop](#): > > i have other one but my mixer only have 4channels To be able to connect more than fifteen things in live, I had made some small passive mixers ---
**Author:** ![Plop](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/plop/32/11707_2.png) [@Plop](https://lookmumnocomputer.discourse.group/u/Plop)\ **Post date:** [August 4, 2021, 10:37am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/52 "2021-08-04T10:37:54Z")
I always forgot the use of vactrol ! What kind of LFO work the more often for you, 555, a super simple OSC (with transitor in reverse avalanche) ? > [@Dud](#): > > To be able to connect more than fifteen things in live, I had made some small passive mixers The sound dont become to quiet at the end ? I have some loud toys and some quiet it’s always a probelem for me to play it togethers A friend just give me a bear that reapeat what you said but with higher pitch. no black blob but the only chip is a microcontroler and i spend few hours to find an interesting bend but nothing yet 😕 i dont realy know what to do with it ---
**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:** [August 4, 2021, 11:58am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/53 "2021-08-04T11:58:14Z")
> [@Plop](#): > > What kind of LFO work the more often for you, I 💓 555 !!! I made several different in toys but the best and the most complete it is with this [schem](https://soundbender36.wordpress.com/2018/09/04/external-lfo-circuit-bending/) > [@Plop](#): > > The sound dont become to quiet at the end ? not as good like a active one but it do the job for your level “problem”, I will advise you to put a volume pot on each toy (can be cool to protect your mixer) and yes some new toy can’t be bending ---
**Author:** ![Plop](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/plop/32/11707_2.png) [@Plop](https://lookmumnocomputer.discourse.group/u/Plop)\ **Post date:** [August 4, 2021, 12:18pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/54 "2021-08-04T12:18:23Z")
> [@Dud](#): > > I 💓 555 !!! Since i burn one and melt a breadboard i never touch 555 again and i call them 666 now 😄But i wil try to fight the demon ! > [@Dud](#): > > for your level “problem”, I will advise you to put a volume pot on each toy (can be cool to protect your mixer) Ok i will do that 🙂 thank you For the unbendable ther is a picture of the (small) circuit ![P1100850](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/0/5/0587c46e3e79bf00b72266b5091fd93438561371.jpeg) White : push button to switch on/off the toys Red/Black : microphone Blue : speaker Black/Orange : power Green/Orange : motor Even if i dont make any bend i think i still can add a jack in and a jack out (to make it like a pedal) I can add LFO to the input or output for the volume (vactrol in parallel with the volume knob ?) And replace the motor with a jack to have a end of cycle trigger The chip is a TR16F064 B [Datasheet here](https://www.avrfreaks.net/sites/default/files/forum_attachments/TR16F064_0.pdf) I need to read more the datasheet to figure what is the clock of this circuit but ther is no crystal on the PCB i read in the book i told you before that you can use a 555 in replacement of some clock in this case but i still never did it yet. ---
**Author:** ![zorch](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/zorch/32/5586_2.png) [@zorch](https://lookmumnocomputer.discourse.group/u/zorch)\ **Post date:** [August 4, 2021, 2:21pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/55 "2021-08-04T14:21:11Z")
> I always forgot the use of vactrol ! Honestly, I would love this shirt ![Screenshot_1](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/c/1/c1598d7e4d124681bbca5588b478afe511dc028c.jpeg) ---
**Author:** ![eric](https://avatars.discourse-cdn.com/v4/letter/e/898d66/32.png) [@eric](https://lookmumnocomputer.discourse.group/u/eric)\ **Post date:** [August 4, 2021, 2:22pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/56 "2021-08-04T14:22:29Z")
Nice timing, I just made a post about tons of vactrols 🙂 ---
**Author:** ![Plop](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/plop/32/11707_2.png) [@Plop](https://lookmumnocomputer.discourse.group/u/Plop)\ **Post date:** [August 7, 2021, 4:30pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/57 "2021-08-07T16:30:28Z")
> [@Dud](#): > > I 💓 555 !!! > I made several different in toys but the best and the most complete it is with this [schem](https://soundbender36.wordpress.com/2018/09/04/external-lfo-circuit-bending/) I redrawn the schematic with a switch to change the rate and i made a small PCB, (3.5 x 4cm) with one mounting hole (M3) in the middle. [Here is the schematic](https://docdro.id/Mkoclmp) And the PCB : ![555-LFO](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/2/4/242e8e353b76b978dcf38803bf2a77001c46958a.png) The full kicad project is [Here](https://github.com/Pl0p/555-LFO) ---
**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:** [August 7, 2021, 10:36pm UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/58 "2021-08-07T22:36:35Z")
PCBs? Luxury! 555s are best built [dead-bug style](https://josef-adamcik.cz/electronics/cyborgduck-555-timer-base-dead-bug-cirquit.html) 😀 (also makes it easier to integrate the build itself in the resulting artifact) ---
**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:** [August 8, 2021, 9:59am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/59 "2021-08-08T09:59:51Z")
The original schematic is from Casper Elecctronics, maybe add it on your schem. you have forgotten the value (50K) for the Depth trimpot 😉 and if you want to use it in some bending toys it will be better maybe to add a vactrol (instead of jack socket ) ---
**Author:** ![Plop](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/plop/32/11707_2.png) [@Plop](https://lookmumnocomputer.discourse.group/u/Plop)\ **Post date:** [August 8, 2021, 10:56am UTC](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58/60 "2021-08-08T10:56:56Z")
Thank you for the trim pot 🙂 For the jack socket/vactrol on the PCB it’s just 2 solder point so you can do both depending if you put the vactor on the toy with a jack input, or if you want to put the vactrol between the LFO and the jack output (LFO side) or if you just want a regular LFO. I try to make it as modular as possible. PCB like this will cost like 5€ for 20 PCB (i didnt upload the file on the PCB maker’s website but i guess it’s super cheap) I try to look at the original schem on casperelectronic website with the internet time-machine but i wasnt able to find it 😕 I will add original schem by Casper electronics > [@fredrik](#): > > PCBs? Luxury! 555s are best built [dead-bug style](https://josef-adamcik.cz/electronics/cyborgduck-555-timer-base-dead-bug-cirquit.html) There is no shape/speed/depth for this one but it’s powered by only 3v i will take a look at my design to see if it can be powered by 3v too the shape pot tend to lower the voltage 😕 but it still could be a very good feature if you can power if from every toys (generaly 4.5v) [Previous page](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58.md?page=2) [Next page](https://lookmumnocomputer.discourse.group/t/circuit-benders-corner/58.md?page=4)