luvdunhill

What Are You Building Today

180 posts in this topic

I believe the old thread is gone, so starting a new one.

A retrofitted power supply for a JDM Esoteric SACD player

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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.

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T2 with DHT's!!  ;D 

Me I just did construction today as I finished all of the small projects I'd been neglecting for the past few weeks.

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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.

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I doubt many people would have a tool to measure 30 degrees that precisely Doug :P

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I don't either, but I can cut 12 of them, put them in a circle, and divide the error by 12.

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(makeshift board heater)

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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?

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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.

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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.

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I failed at cutting a round hole. But it works well enough.

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Round is overrated anyways.

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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 :palm:

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<3 Purple circuitboard

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Here is a low pass filter board, utilizing above discrete opamp

74356eec9931894cf05e3a5e69bccb75.jpg

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Some random person from the other side of the world asked if I could fix a dead channel on his Y1.5 build.

 

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Had a couple of other issues to sort out but the dead channel part was easy.

 

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Fourth pin from the bottom?

//UFN

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C8 ground doesn't appear to be soldered... 1st and 2nd pins from the bottom appear to have something bridging them as well.

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Picked that little thread of wire off and got sound from that channel.  

 

 

 

 

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Had to switch the resistors around but otherwise Ti's upgrade board for the LM78X looks promising. 

 

 

P1040561_zpsrtchserw.jpg

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Here is a low pass filter board, utilizing above discrete opamp

74356eec9931894cf05e3a5e69bccb75.jpg

... And doing something useful. Any guesses on what? :)

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Maybe a crossover?

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My assembly order arrived! Complete with quality stickers!

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