Reddit:Electronics

Macro shot taken using Fujifilm XH2 and Laowa 65mm F2.8.

Captured using Fujifilm XH2 and Laowa 65mm F2.8.

UV module taken from a Convoy S21A light

I added RGB backlighting to my RAM stick to get +20 fps.

This is a heart-shaped LED keychain I made.

My attempt at making a really minimal switching LED driver (as lean as possible without "abusing" components), for a flashlight or something.

I had a lot of fun optimizing it without abusing strange nonlinear effects in components - I would guess the minimum parts you'd need are a choke, (obviously) an LED, sense resistor, flyback diode and 2 transistors (minimum required to create hysteresis).

If you were going to use it with 12 volts of Vdd, the component values would be about 470 uH, 10 ohm shunt, 1k pull up resistor, 10k pot, and a feedback resistor in the tens of kohm, this should yield an LED current of a couple hundred milliamps.

Let me know if you can remove any more components, or if you find it useful somewhere!

This is a laser I’ve made for milled blank double sided boards with mounting holes for alignment. Previously it’s worked for single sided pcb & now I’ve ben working on making a easy system for double sided & still working on a different homing system for easier flipping of the board. The etching fluid I use hydrogen peroxide with hcl. Main board ESP32, gcode sender I use is laser GRBL , where I just insert a screenshot of my traces and resize based on the dimensions of the blank. It’s generally very easy the most challenging part is still aligning, each board takes about 1hr from blank to etched with no drilling & 80% of time is on waiting.

Project files:
https://grabcad.com/library/pcb-laser-v2-1

I’d appreciate a like if anyone uses GrabCAD, it helps my career :) , any feedback or ideas here are also very appreciated!
Still working on V3 with its own firmware for aligning and faster motion, I will likely be done with that in a few months if anyone is interested! I’ll make a update. If anyone decides to make this machine buy a cover for fumes and light protection!

Captured using Fujifilm XH2 and Laowa 65mm F2.8. Quite the beauty.

Got around to making an enclosure for this little guy.

It's was done a lot more strategically than the first one I made. I went with colorful popsicle sticks this time around.

I had the forethought to have the audio sockets stick out from the pcb just enough that when I made the enclosure, they'd go through a side and be flush with the surface so connecting a cable is simple.

I tried to photograph as much of the process as I could remember haha

Someone asked for a schematic in the previous post.

It's seems simple enough, but I'll see if I get around to making one in a follow up if you're interested in making a passive mixer of your own.

Be warned that making it like this in this particular form factor had it's frustrations if you're not experienced with tinkering. It took a lot of patience.

I've got some additional cleaning up to do for the edges, but it turned out nice enough I think.

Opened up a clock so I can make it a tiny guitar amp. Was not expecting what looks like a ghost got…excited…all over this RadioShack clocks innards.

Just got these in their original packaging yesterday!

Guys go n check out this project to know more about the communication protocol.