luvdunhill Posted April 2, 2016 Report Share Posted April 2, 2016 I believe the old thread is gone, so starting a new one. A retrofitted power supply for a JDM Esoteric SACD player 2 Quote Link to comment Share on other sites More sharing options...
mypasswordis Posted April 2, 2016 Report Share Posted April 2, 2016 Today I got my dad to breadboard his first circuit, using a GPIO pin off a Raspberry Pi 3 to blink an LED with a python script. Does that count? Next up for him is a T2. 1 Quote Link to comment Share on other sites More sharing options...
spritzer Posted April 2, 2016 Report Share Posted April 2, 2016 T2 with DHT's!! Me I just did construction today as I finished all of the small projects I'd been neglecting for the past few weeks. 2 Quote Link to comment Share on other sites More sharing options...
dsavitsk Posted April 2, 2016 Report Share Posted April 2, 2016 I spent the day trying to cut a chunk of wood with a 30 degree angle. After a few tries, I am as close as 29.996. That's probably going to have to work. 5 Quote Link to comment Share on other sites More sharing options...
crappyjones123 Posted April 3, 2016 Report Share Posted April 3, 2016 I doubt many people would have a tool to measure 30 degrees that precisely Doug Quote Link to comment Share on other sites More sharing options...
dsavitsk Posted April 3, 2016 Report Share Posted April 3, 2016 I don't either, but I can cut 12 of them, put them in a circle, and divide the error by 12. 5 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 4, 2016 Author Report Share Posted April 4, 2016 (makeshift board heater) Then there were three. Now need a jig to be able to apply the paste to the bottom side - perhaps a piece of plywood with a cutout? As you can see, the middle pin of the transistors and the tabs wouldn't flow. These are multilayer boards with that large copper area exposed. I also had to "reheat" the boards during the process. I am not confident I really got good contact on the j-hook trimmers. I will just apply hand solder to these parts likely. 1 Quote Link to comment Share on other sites More sharing options...
dsavitsk Posted April 4, 2016 Report Share Posted April 4, 2016 That seems like a lot of effort for 18 parts. Have you looked into small ovens? Or hotplates? http://dangerousprototypes.com/2013/03/14/workshop-video-59-946a-solder-reflow-hot-plate-workshop-video/ 1 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 4, 2016 Author Report Share Posted April 4, 2016 Actually I will get these made for me, but need to validate a few values. It was a pretty quick job, much faster than doing it by hand. a plate wasn't viable because there are parts on both sides. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 4, 2016 Author Report Share Posted April 4, 2016 I failed at cutting a round hole. But it works well enough. Quote Link to comment Share on other sites More sharing options...
Fitz Posted April 4, 2016 Report Share Posted April 4, 2016 Round is overrated anyways. Quote Link to comment Share on other sites More sharing options...
Mister X Posted April 4, 2016 Report Share Posted April 4, 2016 Pretty clever makeshift reflow setup. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 6, 2016 Author Report Share Posted April 6, 2016 So, if anyone is interested in some of these micro 11-turn trimmers I have decided to go with a different value and have a kings' ransom of 50 ohm left over Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted April 6, 2016 Report Share Posted April 6, 2016 <3 Purple circuitboard 1 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 11, 2016 Author Report Share Posted April 11, 2016 Burn-in Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 28, 2016 Author Report Share Posted April 28, 2016 Here is a low pass filter board, utilizing above discrete opamp 2 Quote Link to comment Share on other sites More sharing options...
Mister X Posted May 2, 2016 Report Share Posted May 2, 2016 Some random person from the other side of the world asked if I could fix a dead channel on his Y1.5 build. Had a couple of other issues to sort out but the dead channel part was easy. 1 Quote Link to comment Share on other sites More sharing options...
UFN Posted May 2, 2016 Report Share Posted May 2, 2016 Fourth pin from the bottom? //UFN Quote Link to comment Share on other sites More sharing options...
Pars Posted May 2, 2016 Report Share Posted May 2, 2016 C8 ground doesn't appear to be soldered... 1st and 2nd pins from the bottom appear to have something bridging them as well. Quote Link to comment Share on other sites More sharing options...
Mister X Posted May 2, 2016 Report Share Posted May 2, 2016 Picked that little thread of wire off and got sound from that channel. Quote Link to comment Share on other sites More sharing options...
Mister X Posted May 9, 2016 Report Share Posted May 9, 2016 Had to switch the resistors around but otherwise Ti's upgrade board for the LM78X looks promising. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted May 13, 2016 Author Report Share Posted May 13, 2016 cross-post, but in case anyone is interested: http://www.diyaudio.com/forums/swap-meet/291234-fs-nelson-pass-vfet2-front-end-pcbs.html#post4712322 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted May 14, 2016 Author Report Share Posted May 14, 2016 Here is a low pass filter board, utilizing above discrete opamp ... And doing something useful. Any guesses on what? 1 Quote Link to comment Share on other sites More sharing options...
guzziguy Posted May 14, 2016 Report Share Posted May 14, 2016 Maybe a crossover? 1 Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted May 14, 2016 Author Report Share Posted May 14, 2016 My assembly order arrived! Complete with quality stickers! Quote Link to comment Share on other sites More sharing options...
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