# Introduction to Dave from SpectrumDIY **URL:** \ **Category:** Uncategorized\ **Created:** [October 21, 2021, 7:37pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124 "2021-10-21T19:37:25Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 7:37pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/1 "2021-10-21T19:37:25Z")
Hello! Just wanted to introduce myself, my name is Dave! Came here from a livestream and I run Spectrum DIY šŸ˜ƒ I love DIY, music and electronics. Iā€™ve been playing guitar all my life, but I play other instruments as well, been wanting to start making soundscapes a bit for some of my videos, thought what better way to do it, than DIY šŸ˜ƒ Soā€¦ yeah, pleased to meet you all! Only thing Iā€™ve got really I can share is the most recent project, which is not finished. Only just finished the VCO module today and Iā€™ve been hesitant to test it in case I blow up the CEM3340 chip XD EDIT: Figured out how to add pictures XD ![IMG_20211021_135814621_HDR](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/7/d/7d377b7a484500b850f55f78f5b9ef2e6f7b3618.jpeg) Hereā€™s a couple links of the project: [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/3/e/3ee869eebeb2590d8fc2c291e3438d730dc6f258.jpeg "Switches installed on the DIY Halloween Synth") ](https://www.youtube.com/watch?v=vbBwTePus84) [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/3/7/3710165558a54fca6a3afafd483baa502c75b7f8.jpeg "Slowest wiring pan ever") ](https://www.youtube.com/watch?v=lZPR-2TlCaE) ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [October 21, 2021, 7:38pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/2 "2021-10-21T19:38:27Z")
Welcome to the forum šŸ˜‰ twinturbo aka Robin Clayton šŸ˜‰ ---
**Author:** ![Dave](https://avatars.discourse-cdn.com/v4/letter/d/ee7513/32.png) [@Dave](https://lookmumnocomputer.discourse.group/u/Dave)\ **Post date:** [October 21, 2021, 7:42pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/3 "2021-10-21T19:42:59Z")
Welcome @SpectrumDIY StudioSixPlusOne on youtube here, I will watch your videos in a bit ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 7:45pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/4 "2021-10-21T19:45:15Z")
Thanks you guys! @twinturbo @Dave ---
**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:** [October 21, 2021, 7:53pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/5 "2021-10-21T19:53:16Z")
Just a headsup that we have a stickied intro thread, but weā€™re not that picky and Iā€™m too lazy to move this right now so this is fine too šŸ˜ƒ > [@Introductions: Say hello, tell us about yourself and your projects](https://lookmumnocomputer.discourse.group/t/introductions-say-hello-tell-us-about-yourself-and-your-projects/24): > > Itā€™s customary to have a topic on a forum where new users can introduce themselves. Here goes. About me. Iā€™m Bitnik on MuffWiggler Forums where Iā€™m new and quite chatty, but to reiterate the important stuff Iā€™m very new to modular and as Iā€™m not made of money Iā€™m going to build my own gear. Iā€™ve ordered a couple of Kosmo PCB+Panel kits and a Frequency Central power PCB and an AC wall wart to feed it. Iā€™m using an old bookcase rather than building my own cases. Another early project will be a ā€¦ ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 7:54pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/6 "2021-10-21T19:54:50Z")
Ah snapā€¦ my apologiesā€¦ Iā€™m not very forum savvy šŸ˜… ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [October 21, 2021, 8:03pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/7 "2021-10-21T20:03:07Z")
Thatā€™s fine, Im not very music savvy. Aint got a clue about any of the theory šŸ˜‰ Measures are something to do with Gin in my head. ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [October 21, 2021, 8:06pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/8 "2021-10-21T20:06:33Z")
P.S. Usualy for power up on modules we say to apply power with no ICā€™s , then with expendable ones like the TLO74ā€™s . And then meter the power on the expensive IC socket power/GND to make sure itā€™s rightā€¦ That way you reduce the chance of letting out the magic smoke. ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 8:07pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/9 "2021-10-21T20:07:48Z")
Hey cheers for that! Thatā€™s a great piece of advice: Agreed on the measure šŸ˜‰ (I do not speak musical theory either, I only know how to play by ear) ---
**Author:** ![Dave](https://avatars.discourse-cdn.com/v4/letter/d/ee7513/32.png) [@Dave](https://lookmumnocomputer.discourse.group/u/Dave)\ **Post date:** [October 21, 2021, 8:18pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/10 "2021-10-21T20:18:20Z")
Nice sounding drone box you have built, and a cool video presenting style. Please keep us updated. Good luck with the 3340, @twinturbo has given good advice, checking the power is all correct to the IC is easy, and a very good frustration saver, but Iā€™m sure most of us have forgotten and regretted not doing this simple check. ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 8:54pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/11 "2021-10-21T20:54:50Z")
Cheers @Dave ! Much appreciated! I just finished assembling itā€¦ next is to run the tests on it before putting in the chips, then see what happens šŸ˜ƒ ![IMG_20211021_155026761](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/5/6/5607db7808aec1042be3185dda25bdff55c6e66e.jpeg) ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 8:55pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/12 "2021-10-21T20:55:31Z")
![IMG_20211021_155151644](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/a/1/a1a1a0f02f606ca2c3868e55cd823d74c4c9ca07.jpeg) Hereā€™s front side as well, not that it really shows much except my messiness XD EDIT: Turns out, it failedā€¦ but thatā€™s okay. Iā€™ve been non-stopping for a while. So thatā€™s probably a sign for a break. Shall come back to it tomorrow and just build a new board. TBH I donā€™t see any issues anywhere, but again, tired. šŸ˜… ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [October 21, 2021, 11:03pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/13 "2021-10-21T23:03:10Z")
Welcome! Subtle use of pots and arcade buttons there. šŸ™‚ Very impressive. If you get time can you walk us through the build. Stick at the vco My first 3340 failed; forgot to put chip in. Second attempt failed; forgot to hook up power. Third failure? No power to my test ampā€¦ And just before my last failure I spotted Iā€™d wired up the power backwards. (Thankfully no smoke) After that it was plain sailing (oh I just had to reverse the pots and ground all the jacks properly and ā€¦ Well, youā€™ll get there) ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [October 21, 2021, 11:05pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/14 "2021-10-21T23:05:38Z")
Top right. Are those resistor legs shorting? ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 11:46pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/15 "2021-10-21T23:46:56Z")
I really appreciate your feedbackā€¦ I am trying not to give up on it šŸ˜… And which build? The halloween synth? Iā€™m in the process of that, but I wanted to try to get what I could done before halloween, so hopefully I can play something for that day šŸ˜ƒ Granted, I will be perfectly content if all I can do is play what Iā€™ve got working (the 20 oscillators). I just got through playing guitar for a while, thought that might help. As to the resistor legs, I thought the same, so I checked and nothing is touching there, but it is very close. Iā€™m seriously thinking about redoing the board and sacrificing those small components for later diagnosis But just in case I canā€™t get it done on the boards Iā€™ve got on hand, or something else goes astray, I did buy some stripboard, though itā€™ll be next week probably before it gets here (at the earliest) ---
**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:** [October 21, 2021, 11:47pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/16 "2021-10-21T23:47:13Z")
> [@twinturbo](#): > > we say to apply power with no ICā€™s , then with expendable ones like the TLO74ā€™s . And then meter the power on the expensive IC socket I like how you said ā€œwe say toā€. Whether we actually do is another question. My latest module has eight TL074s in it, fortunately only two were in place the first time I tried powering it upā€¦ Hereā€™s the usual video link: [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/c/cae53281dd1b863e8956e70b85759f9b54602891.jpeg "Check the power header for shorts! or: How to avoid the "Magic Smoke"") ](https://www.youtube.com/watch?v=qS0SoIiiQCo) To which add: > Something not addressed in that video is: If there are 10R resistors or diodes in series on the power rails, shorts elsewhere in the module will not be found by checking at the power header. Check again at the other sides of the resistors or diodes. I always do this, usually. ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 21, 2021, 11:48pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/17 "2021-10-21T23:48:23Z")
Wicked intro video! (watching 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:** [October 21, 2021, 11:49pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/18 "2021-10-21T23:49:08Z")
And also: > [@Who, Where, What. the community](https://lookmumnocomputer.discourse.group/t/who-where-what-the-community/544): > > Most forums I frequent(ed) were well established, usualy car forums, often we joind up for showsā€¦ This is a little differentā€¦ So this is a what might connect us threadā€¦ To avoid pillagin by ā€œthreat actorsā€ donā€™t be too specific. Q1. 1st Name Q2. City, Country. Q3. Rough Job. Q4. What do you driveā€¦ Q5. Musical talent Q6. Electronic Tallent. ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [October 21, 2021, 11:59pm UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/19 "2021-10-21T23:59:50Z")
Hi. Yes the Halloween synth please. There are verified stripboard 3340 builders here if you canā€™t find the fault in the protoboard. Keep us posted. ---
**Author:** ![SpectrumDIY](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/spectrumdiy/32/17510_2.png) [@SpectrumDIY](https://lookmumnocomputer.discourse.group/u/SpectrumDIY)\ **Post date:** [October 22, 2021, 12:03am UTC](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124/20 "2021-10-22T00:03:14Z")
Certainly! I shall keep that in mind when I do the next upload. And thank you again! šŸ˜ƒ [Next page](https://lookmumnocomputer.discourse.group/t/introduction-to-dave-from-spectrumdiy/4124.md?page=2)