GuitarPCB | Dr Seamus | Activity https://guitarpcb.com/members/drseamus/activity/ Activity feed for Dr Seamus. Thu, 23 Apr 2026 17:20:22 -0400 https://buddypress.org/?v= en-US 30 hourly 2 e9f27369c59e4cee8418887770c2a861 Dr Seamus replied to the topic Dr Seamus LED question in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/dr-seamus-led-question/#post-26975 Mon, 05 Dec 2022 01:49:55 -0500 Voltage at left side of R8 is showing 8.96v when using a one-spot type of power adapter.

Gave up after an hour or so and swiped one of the GPCB 3pdt daughterboards from the Super Drive 70’s build that I had planned. Got that all wired in and the LED lit up as expected. Guess I’ll be sure to pick up a few more for the other GPCB projects I have…Read more

]]> 0 777ac6a503fc22d66525fe57e1abeb0a Dr Seamus replied to the topic Dr Seamus LED question in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/dr-seamus-led-question/#post-26961 Sun, 04 Dec 2022 03:17:47 -0500 Swapped in a new 3pdt… same result. So I’m guessing the issue is somewhere on the main PCB

]]> 0 56f523282255f82140431c15c4074650 Dr Seamus replied to the topic Dr Seamus LED question in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/dr-seamus-led-question/#post-26947 Fri, 02 Dec 2022 18:15:49 -0500 Getting continuity between 3pdt lugs 4 & 5 in effects mode, also getting it from left side of R8 to the LED anode pad (3k3 resistor… measured at 3.28k, so not far off). Same with LED anode to center lug on 3pdt. Voltage at left side of R8 is showing 8.96v when using a one-spot type of power adapter.

Interestingly, I cleaned between the lugs of…Read more

]]> 0 93a37db8753ff3bc874511f8993d19ac Dr Seamus replied to the topic Dr Seamus LED question in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/dr-seamus-led-question/#post-26932 Thu, 01 Dec 2022 17:07:10 -0500 Fought with this thing for awhile last night… reflowed all suggested joins, cleaned up the board again for any potential stray flux… still getting the same result.

It’s a clear white 3mm LED, which i believe has a forward voltage somewhere around 2.75 – 3v. Dunno if that would be the culprit… I used a single color “warm white” LED in the…Read more

]]> 0 58f8fa45ea01352aba53f870f84ec79f Dr Seamus replied to the topic Dr Seamus LED question in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/dr-seamus-led-question/#post-26919 Wed, 30 Nov 2022 16:37:20 -0500 Ok cool. Thought I had removed it somehow!

Removed the lead from S6 to pad 6… getting sound in bypass and when engaged, but the LED still refuses to light.

Got out the DMM and did a diode test by connecting + to the center pad on D2 and – to the one on the right (non-white) and the LED lit up. So I managed to get that part right.

S4 is the…Read more

]]> 0 d44738da74befd3b61c3f2aea9e6882c Dr Seamus replied to the topic Mini-Me - Burned Resistor? in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/mini-me-burned-resistor/#post-26332 Tue, 27 Sep 2022 02:53:45 -0400 1n5817 added at the R31 (now D5) spot, buttoned back up and sounding great. Thank you again!

]]> 0 3db596aeeaa5725957867d8de75cfc66 Dr Seamus replied to the topic Mini-Me - Burned Resistor? in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/mini-me-burned-resistor/#post-26331 Tue, 27 Sep 2022 02:32:33 -0400 Yep, looks like I really fried that thing… Thanks again for taking a look!

]]> 0 f83d72acee42443755c0ff67ca1de145 Dr Seamus replied to the topic Mini-Me - Burned Resistor? in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/mini-me-burned-resistor/#post-26329 Tue, 27 Sep 2022 01:31:18 -0400 Ok.. although I was working with the Mini-Me 2020 version build doc (https://guitarpcb.com/wp-content/uploads/2018/06/Mini-Me-2020-Build-Document.pdf), which does not have a D5, but rather R31 (47 ohm) in that position. Prior to assembly I had gone through all of the MM version docs to confirm it matched the PCB layout/illustration.

If I were to…Read more

]]> 0 a1c38b1e7310ccda3bfe86d4cdbc2eb8 Dr Seamus started the topic Mini-Me - Burned Resistor? in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/mini-me-burned-resistor/ Mon, 26 Sep 2022 19:30:17 -0400 Hello All,

Finally got around to assembling the Mini-Me PCB (v2020) I picked up last year, and also decided to add one of the roto-tone boards for my first combo build. After getting it working, really happy how this turned out (thanks Wilkie!!) and also feel like I’ve learned a few things.

But one item that I’m trying to figure out is how I…Read more

]]> 0 229b2a64a8cb37d260f10444753e3073 Dr Seamus replied to the topic EA Tremolo v4 Troubles - LED Not Flashing in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/ea-tremolo-v4-troubles-led-not-flashing/#post-22867 Tue, 01 Feb 2022 17:08:26 -0500 My soldering skills are still a work in progress, so probably best I stick with the sockets.

That looks like a much cleaner solution for LED placement. Adding some shrink wrap to my Tayda cart now. Thanks again!

]]> 0 c3f32835e39d31e13779fb2f4ab5520c Dr Seamus replied to the topic EA Tremolo v4 Troubles - LED Not Flashing in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/ea-tremolo-v4-troubles-led-not-flashing/#post-22863 Tue, 01 Feb 2022 15:03:54 -0500 Looks like putting a little bend in each leg of the transistor got it to seat and hold a connection much more reliably. Will get  out the iron a bit later and try tacking it in with a bit of solder. Thanks Cybercrow! Definitely a trick I’ll use in future builds.

Would you recommend just soldering in the transistors (silicon ones, anyway) rather…Read more

]]> 0 a48f97b1f26317042151e52aa5835755 Dr Seamus changed their profile picture https://guitarpcb.com/activity/p/13971/ Mon, 31 Jan 2022 20:14:27 -0500 0 a1ab51f0c6dd914957f1be53959c9815 Dr Seamus replied to the topic EA Tremolo v4 Troubles - LED Not Flashing in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/ea-tremolo-v4-troubles-led-not-flashing/#post-22852 Mon, 31 Jan 2022 20:02:23 -0500 Thank you both again. Swapped in a new switch, wired it up and the tremolo is now working! No thanks to a socket that only holds onto Q3 after wobbling it a bit, but I’ll figure something out.

There is a bit of hum/buzz when engaged that you can hear with the throb of the tremolo. It quiets a bit when using a humbucker equipped guitar, but still…Read more

]]> 0 5245343f0d5711b621db3b7262836962 Dr Seamus changed their profile picture https://guitarpcb.com/activity/p/13957/ Sun, 30 Jan 2022 02:33:10 -0500 0 74cbc7aa95fdaf2264eb98853fc8d17b Dr Seamus replied to the topic EA Tremolo v4 Troubles - LED Not Flashing in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/ea-tremolo-v4-troubles-led-not-flashing/#post-22838 Sun, 30 Jan 2022 00:11:35 -0500 Ah! Not sure how I missed that. Thank you both! Guess I’ll save that 3PDT daughterboard for the Mini Me Chorus

]]> 0 54ee736c6a011b12aaa7712d818e1129 Dr Seamus's profile was updated https://guitarpcb.com/activity/p/13950/ Sat, 29 Jan 2022 22:03:12 -0500 0 3f1a58b96ecb11b4bda8f7938e685694 Dr Seamus started the topic EA Tremolo v4 Troubles - LED Not Flashing in the forum GuitarPCB Build Support https://guitarpcb.com/community/topic/ea-tremolo-v4-troubles-led-not-flashing/ Sat, 29 Jan 2022 22:02:09 -0500 Hello everyone. I’ve managed a few successful builds now, but this one has me stumped. Grateful for any assistance folks out there can provide.

Got everything set for the EA Tremolo v4 project, but when I powered it up and hit the switch no tremolo effect. LED lights and changes from red to green when engaged, but it does not flash/pulse when…Read more

]]> 0 e7951df0443d57679b5d160f244ac7b5 Dr Seamus replied to the topic BMP Op Amp v2 - Cap Choices? in the forum General DIY Pedal Discussion https://guitarpcb.com/forums/topic/bmp-op-amp-v2-cap-choices/#post-19734 Thu, 15 Jul 2021 05:35:53 -0400 Thanks Barry! Looking at the Paypal receipt now, just realized that i’ve ordered a number of parts from your shop. I guess I’m headed in the right direction then!

]]> 0 990c8659c8d7f7db95f08ed167a41705 Dr Seamus started the topic BMP Op Amp v2 - Cap Choices? in the forum General DIY Pedal Discussion https://guitarpcb.com/forums/topic/bmp-op-amp-v2-cap-choices/ Thu, 15 Jul 2021 03:04:09 -0400 Hey There… still getting my feet wet with the pedal building hobby. Completed two kits at this point (OKF from Guitar PCB and a Stew Mac Slow Gear clone) and they’ve worked out pretty well. Enjoying this a lot, but noticed a lot of kit builds are sold out at the moment due to part shortages. So thought I’d give locating my own parts a try.…Read more

]]> 0 f9cdfbed8f5b068847da28801d6eb544 Dr Seamus replied to the topic First Time Build Help - One Knob Fuzz (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/forums/topic/first-time-build-help-one-knob-fuzz/#post-16692 Sun, 17 Jan 2021 23:30:23 -0500 Billy, I owe you a beer. It’s alive!

Thanks for everyone’s help!

]]> 0 db5cb532db95b7c7458f614588f12f55 Dr Seamus replied to the topic First Time Build Help - One Knob Fuzz (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/forums/topic/first-time-build-help-one-knob-fuzz/#post-16607 Sun, 10 Jan 2021 22:42:19 -0500 Was able to sort out that I had the 9v hot on the wrong post to the power input jack, and added a resistor to the “clr” part of the 3pdt wiring board. Now the LED will light up when the effect is engaged, and the clean signal comes through when in bypass mode.

But when the effect is engaged all I get is a loud buzz/hum that will increase in…Read more

]]> 0 5a97605c0caf7420539d3113127d810c Dr Seamus replied to the topic First Time Build Help - One Knob Fuzz (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/forums/topic/first-time-build-help-one-knob-fuzz/#post-16457 Thu, 31 Dec 2020 04:15:44 -0500 Thanks again for everyone’s help on the OKF. Got everything wired into the enclosure, but now only getting a loud buzz when the effect is engaged (nothing when in bypass). When engaged and the knob is turned, the buzz will get louder/softer as you rotate and the LED will not light.

 

I used the 3PDT board and wired the LED to that (tested it…Read more

]]> 0 e5361e320c79015b28a585f3aa7dd39b Dr Seamus replied to the topic First Time Build Help - One Knob Fuzz (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/forums/topic/first-time-build-help-one-knob-fuzz/#post-16277 Sat, 19 Dec 2020 15:50:50 -0500 Thank you all! Gonna give that a try today!

]]> 0 61742d911bc6e59f41a29baac414c94f Dr Seamus started the topic First Time Build Help - One Knob Fuzz (solved) in the forum GuitarPCB Build Support https://guitarpcb.com/forums/topic/first-time-build-help-one-knob-fuzz/ Sun, 06 Dec 2020 20:54:49 -0500 Hello All… first time builder, first time caller, er… poster. Anyhow, have been interested in guitar pedals for a while but have little to no experience with electronics. So thought maybe the best build to start would be the One Knob Fuzz kit from Pedal Parts And Kits. The page indicated that it was a good one for beginners, which apart from…Read more

]]> 0 5b39802f6baf986cd8bc7cbf9ae88ef4 Andrew Page became a registered member https://guitarpcb.com/activity/p/9534/ Sat, 28 Nov 2020 17:09:23 -0500 0 fffdca98feec26b5e603bfdde43c043a Dr Seamus became a registered member https://guitarpcb.com/activity/p/9533/ Sat, 28 Nov 2020 17:09:22 -0500 0