April 2, 201610 yr I believe the old thread is gone, so starting a new one. A retrofitted power supply for a JDM Esoteric SACD player
April 2, 201610 yr 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.
April 2, 201610 yr 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.
April 2, 201610 yr 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.
April 3, 201610 yr I don't either, but I can cut 12 of them, put them in a circle, and divide the error by 12.
April 4, 201610 yr Author (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.
April 4, 201610 yr 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/
April 4, 201610 yr Author 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.
April 6, 201610 yr Author 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
May 2, 201610 yr 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.
May 2, 201610 yr C8 ground doesn't appear to be soldered... 1st and 2nd pins from the bottom appear to have something bridging them as well.
May 9, 201610 yr Had to switch the resistors around but otherwise Ti's upgrade board for the LM78X looks promising.
May 13, 201610 yr Author 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
May 14, 201610 yr Author Here is a low pass filter board, utilizing above discrete opamp ... And doing something useful. Any guesses on what?
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