April 2, 201610 yr comment_725658 I believe the old thread is gone, so starting a new one. A retrofitted power supply for a JDM Esoteric SACD player Report
April 2, 201610 yr comment_725685 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. Report
April 2, 201610 yr comment_725686 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. Report
April 2, 201610 yr comment_725689 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. Report
April 3, 201610 yr comment_725691 I doubt many people would have a tool to measure 30 degrees that precisely Doug Report
April 3, 201610 yr comment_725696 I don't either, but I can cut 12 of them, put them in a circle, and divide the error by 12. Report
April 4, 201610 yr Author comment_725883 (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. Report
April 4, 201610 yr comment_725886 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/ Report
April 4, 201610 yr Author comment_725888 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. Report
April 4, 201610 yr Author comment_725904 I failed at cutting a round hole. But it works well enough. Report
April 6, 201610 yr Author comment_726084 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 Report
April 28, 201610 yr Author comment_728494 Here is a low pass filter board, utilizing above discrete opamp Report
May 2, 201610 yr comment_728940 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. Report
May 2, 201610 yr comment_728968 C8 ground doesn't appear to be soldered... 1st and 2nd pins from the bottom appear to have something bridging them as well. Report
May 2, 201610 yr comment_728976 Picked that little thread of wire off and got sound from that channel. Report
May 9, 201610 yr comment_729569 Had to switch the resistors around but otherwise Ti's upgrade board for the LM78X looks promising. Report
May 13, 201610 yr Author comment_729973 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 Report
May 14, 201610 yr Author comment_730005 Here is a low pass filter board, utilizing above discrete opamp ... And doing something useful. Any guesses on what? Report
May 14, 201610 yr Author comment_730057 My assembly order arrived! Complete with quality stickers! Report
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