# \#2000 Megadrone **URL:** \ **Category:** KOSMO MODULES\ **Created:** [August 17, 2020, 9:19pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638 "2020-08-17T21:19:47Z")\ **Posts on this page:** 20\ **Page:** 16
**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:** [February 24, 2021, 10:43am UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/309 "2021-02-24T10:43:25Z")
Welcome šŸ™‚ > [@oneticketroundtrip](#): > > -ALSO one other major thing is ive been really wanting to have is two master pitch knobsā€¦to split the drones into 5 and 5 and control pitch with two knobs thatā€™s mean 2 separate drone of 5 osc with their own master pitch so their own power with the PCB version i donā€™t really know if itā€™s possible (maybe cut some trace ? and add wire but ā€¦ not simple i think) or make a 2 x 10 šŸ˜‰ , or donā€™t use the PCB and make your own split circuit The Megadrone work with 12V and GND , but can work too with bipolar power, the easiest way would be to feed it with + 12 / GND / -12 to add something else like the [Simple Delay](https://www.lookmumnocomputer.com/projects#/2399-triple-splashback) (at down page) can be add before the output. or you must find some schematics with only +12V/GND ---
**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:** [February 24, 2021, 10:27pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/310 "2021-02-24T22:27:05Z")
mouser most likely does have everything its just a pain in the ass to find the way their search thing works you have to be a professional orderer to find what you are looking for . that said it seems to me [like usual] I got the parts from a few different places . ---
**Author:** ![katheudo](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/katheudo/32/10918_2.png) [@katheudo](https://lookmumnocomputer.discourse.group/u/katheudo)\ **Post date:** [March 8, 2021, 2:31am UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/311 "2021-03-08T02:31:11Z")
Sooooo I want to build another Megadrone for insane stereo action only to find that itā€™s ding dang sold out! Anyone out there with a pack of B-Stock that wants to sell me an extra? Iā€™m in the US, can pay shipping from wherever. Or maybe Sam will do a new run of kits? ---
**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:** [March 8, 2021, 12:44pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/312 "2021-03-08T12:44:50Z")
hey they will be back in a few days! im packing them today funnily enough! had quite a hold up this past month, also the safety valve module is going up this week too ---
**Author:** ![unexpectedbowtie](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/unexpectedbowtie/32/10648_2.png) [@unexpectedbowtie](https://lookmumnocomputer.discourse.group/u/unexpectedbowtie)\ **Post date:** [March 30, 2021, 10:19am UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/313 "2021-03-30T10:19:15Z")
This build is so straightforward; itā€™s embarassing how much hassle Iā€™ve had with it. First I socketed the MOSFETs, which was great, but the legs were too thick, so I de-soldered them all. I didnā€™t think to clip the legs down. That has meant Iā€™ve had a whole bunch of problems with them since. One of them wonā€™t work at all despite having replaced it numerous times, and a few others wonā€™t react to the master tune knob. Output wise I am getting sound at least. Itā€™s very quiet, which isnā€™t a big deal as I can amplify it, but thereā€™s a really loud humming noise which seems like a grounding issue that I canā€™t figure out. I suspect Iā€™ve cocked something up on the PCB, but canā€™t really face starting it all again with a new one. Iā€™m just going to put it away in a drawer for a few months and forget about it until I get the enthusiasm to try again ha. ---
**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:** [March 30, 2021, 9:13pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/314 "2021-03-30T21:13:06Z")
yeah I have a drawer like that ā€¦ a really big drawer . ---
**Author:** ![yawningcrispy](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/yawningcrispy/32/13931_2.png) [@yawningcrispy](https://lookmumnocomputer.discourse.group/u/yawningcrispy)\ **Post date:** [April 1, 2021, 2:56pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/315 "2021-04-01T14:56:12Z")
Quite new to this, having a hard time finding all the right parts without having to order on 5 different sites, which ends up getting quite expensive considering tax and shipping to Norwayā€¦ For me it would be so much easier if i could just buy a package containing all the components needed. Any tips on good sites? A site where they have almost everything needed to build this synth would be amazing ---
**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 1, 2021, 3:45pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/316 "2021-04-01T15:45:28Z")
The main sites I use are Mouser and Tayda. Tayda is generally cheaper and is good for the more common components(resistors, caps, jacks, etc). Mouser is more expensive and the search function takes ages to navigate but they have pretty much everything you can imagine. A quick look at Tayda and they seem to have everything except the transistors, pots, and mosfets. Mouser should have the transistors and mosfets. Pots are a little more difficult - Tayda has them but are almost always out of stock. There is a thread on here about pots but I canā€™t find it at the moment. Iā€™ve not built this module myself so donā€™t know if you can substitute from the ā€˜recommended componentsā€™ in the BOM. [https://eu.mouser.com](https://eu.mouser.com) [https://taydaelectronics.com](https://taydaelectronics.com) Hope that helps šŸ˜€ Edit: thread on ~~potato~~ pots is here: > [@Difficulty Finding b100k 9mm pots](https://lookmumnocomputer.discourse.group/t/difficulty-finding-b100k-9mm-pots/1164/): > > Guys, been hunting some b100k 9mm pots (6.35mm dia) for my VCO and Filter PCB builds but have been having some trouble. They are backordered on Tayda, Mouser, AmplifiedParts. Thonk is not taking orders right now. Does anyone have a good recommendation of where to find some? Iā€™m still getting used to all the terminology that comes with this parts and itā€™s a little overwhelming at times. Modular Addict Has some T18 versions that seem like they will work: [https://modularaddict.com/parts/potentiomā€¦](https://modularaddict.com/parts/potentiometers-1/9mm-t18-vertical-potentiometers) ---
**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:** [April 1, 2021, 3:57pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/317 "2021-04-01T15:57:39Z")
Or this, from the FAQ category > [@9 mm PCB mount vertical pots](https://lookmumnocomputer.discourse.group/t/9-mm-pcb-mount-vertical-pots/1732): > > This is wiki, add or correct sources as needed. Some sources of these perpetually hard to find pots, often out of stock, keep looking: Amplified Parts (USA) / Alpha / [https://www.amplifiedparts.com/products/potentiometer-alpha-linear-9mm-vertical](https://www.amplifiedparts.com/products/potentiometer-alpha-linear-9mm-vertical) Bitsbox (UK) / Alpha / [9mm Alpha Potentiometers](https://www.bitsbox.co.uk/index.php?main_page=index&cPath=94_325) Modular Addict (USA) / ā€œcomparable to Alphaā€ / [https://modularaddict.com/parts/9mm-potentiometers](https://modularaddict.com/parts/9mm-potentiometers) Mouser (global) / Alpha / [https://www.mouser.com/ProductDetail/Alpha-Taiwan/RD901F-40-15R1-B100K-00DL1?qā€¦](https://www.mouser.com/ProductDetail/Alpha-Taiwan/RD901F-40-15R1-B100K-00DL1?qs=1mbolxNpo8czbLgndpJJVQ%3D%3D) ---
**Author:** ![fluxpavilion](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fluxpavilion/32/2475_2.png) [@fluxpavilion](https://lookmumnocomputer.discourse.group/u/fluxpavilion)\ **Post date:** [April 26, 2021, 8:09pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/318 "2021-04-26T20:09:05Z")
so am i right in assuming a higher OSC CAP value the deeper the range? so to get one like sam showed in a video where he had different oscā€™s covering a different range, you wanna use different caps over the 10 oscillators? im guessing thats why people are socketing the caps! but why socket the MOSFETS? ---
**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 26, 2021, 9:02pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/319 "2021-04-26T21:02:19Z")
> [@fluxpavilion](#): > > a higher OSC CAP value the deeper the range yes, and a smaller value for a higher range šŸ™‚ ---
**Author:** ![fluxpavilion](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fluxpavilion/32/2475_2.png) [@fluxpavilion](https://lookmumnocomputer.discourse.group/u/fluxpavilion)\ **Post date:** [April 26, 2021, 9:07pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/320 "2021-04-26T21:07:29Z")
lol you edited so quickly!! i reckon maybe i should socket them aswell . . . . ---
**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 26, 2021, 9:09pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/321 "2021-04-26T21:09:45Z")
> [@fluxpavilion](#): > > i reckon maybe i should socket them aswell . yes for more differents test (taste) ---
**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:** [April 26, 2021, 9:59pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/322 "2021-04-26T21:59:37Z")
Donā€™t know much about MOSFETs but Iā€™ve heard theyā€™re easy to fry. ---
**Author:** ![fluxpavilion](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fluxpavilion/32/2475_2.png) [@fluxpavilion](https://lookmumnocomputer.discourse.group/u/fluxpavilion)\ **Post date:** [April 28, 2021, 11:00am UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/323 "2021-04-28T11:00:55Z")
what sockets are everyone using for the MOSFETs? all my sockets are too small ---
**Author:** ![brianutatx](https://avatars.discourse-cdn.com/v4/letter/b/e47774/32.png) [@brianutatx](https://lookmumnocomputer.discourse.group/u/brianutatx)\ **Post date:** [April 28, 2021, 4:01pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/324 "2021-04-28T16:01:49Z")
Hey everyone, this is my first DIY build so Iā€™m new to all this. I just finished soldering everything up and plugged in the Megadrone and it is not working. I first plugged it in with 9V 100mA power supply , then I plugged it into a 9V 1800mA power supply. Both didnā€™t work . I quickly realized I was supposed to be using 12V , so I plugged it in with a 12V 100 mA power supply , still nothing and followed that with a 12V 1800mA power supply. Both times I used the 1800mA power supply I saw smoke. I measured the resistors and noticed that the 10R, 680k , 10M and all of the 47k resistors resistance values have dropped considerably. Do you think when I plugged in the 1800mA power supply too much current was sent through the resistors and that is why their values dropped ? Also are their any other components I may have destroyed from this ? Any help would be appreciated. ---
**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:** [April 28, 2021, 4:50pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/325 "2021-04-28T16:50:31Z")
The only way to push too much current through a resistor is to use too high a voltage (ohmā€™s law: I=V/R), and it sounds like youā€™re well within specs on that front. Odds are you have a short somewhere, which caused the 10 ohm resistors to overheat. (a 10 ohm resistor will die quickly if it gets the full 12 V across it, but you cannot really destroy a 47k resistor in that way, since the resulting power loss is a measly 3 mW, and much less than that for the higher values. Did you measure the lower values in circuit? That doesnā€™t necessarily work, since the current can take different ways through the circuit, messing with your measurements.) ---
**Author:** ![brianutatx](https://avatars.discourse-cdn.com/v4/letter/b/e47774/32.png) [@brianutatx](https://lookmumnocomputer.discourse.group/u/brianutatx)\ **Post date:** [April 28, 2021, 5:37pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/326 "2021-04-28T17:37:15Z")
I did have a bad solder joint on one of the LEDs, I fixed that. I measured the resistors individually on the board using the ohm setting on my multimeter and compared it to the resistors I have still in the package. the 47k resistors are giving me a measurement of 12.5k right now. ---
**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:** [April 28, 2021, 6:24pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/327 "2021-04-28T18:24:22Z")
Yeah, resistance measurements in circuit are problematic ā€” if thereā€™s a smaller or similar resistance in parallel youā€™ll measure something significantly smaller. I wouldnā€™t worry about the resistors other than the 10R ones unless theyā€™re actually smoking or something. Replace the 10R resistors and troubleshoot: [https://lookmumnocomputer.discourse.group/t/general-advice-for-troubleshooting-a-module/2049/2](https://lookmumnocomputer.discourse.group/t/general-advice-for-troubleshooting-a-module/2049/2) ---
**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:** [April 28, 2021, 9:35pm UTC](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638/328 "2021-04-28T21:35:53Z")
> [@brianutatx](#): > > the 47k resistors are giving me a measurement of 12.5k right now. Thatā€™s roughly what youā€™d expect from that circuit, assuming youā€™ve populated all 10 oscillators. The 47k resistor is in series with a 10k potentiometer, and there are ten such 10k+47k pairs in parallel between +12 V and ground. If you measure the resistance across one of the 47k resistors, you have 47k in parallel with a 10k in series with nine 10k+47k parallel pairs, which is 47k||(10k+57k/9) or around 12.1k: ![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/3/39ab2ca962334ecb7232762885d730dd33dd57fc.jpeg) If you have a full short between +12 V and ground, youā€™d see 47k||10k instead which is about 8.2k. [Previous page](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638.md?page=15) [Next page](https://lookmumnocomputer.discourse.group/t/2000-megadrone/1638.md?page=17)