Reddit:Electronics

My mom wanted battery-powered lamps for decoration. There are commercial options available but none of them met this style of lamp. But she bought these lamps from Ikea and asked if I could make them battery-powered.

I got to work and designed the LED driver board. It was made to fit into old, broken light bulbs and is based around a TI constant-current Boost LED driver, a 555 timer adjustable PWM generator and three white LEDs.

I ordered the board from AISLER and the parts from LCSC. AS you can See on the picture, I had to fix a small mistake I made with some wire, but apart from that everything works flawlessly. And please ignore my very ugly solder job on the PCB🙈 The second lamp I built looks better...

For charging and protecting the battery, I used a cheap USB-C charge/protect module from EBay. Glued it along with the 18650 cell and holder into the base and done!

This is my ongoing build that is working now after i put a lm317/lm337 regulator in it untill i figure out how to build a series pass regulator. Going to add filters on the dc side aswell. Softstart/emi filter/transformer/rectifier, 15000uF + 10000uF + 5630uF with capacitance multiplier and ifcourse the regulator.

I had to stop sorting at this point. My tweezer fingers started to hurt.

Not my first time doing this but my second and for some reason the first tike was successful and this wasnt😂😂

I recapped an old but brand-new looking 50-60's Heatkit tube power supply.

those where made back in the days to be used on the hobbyist workbench as a power supply specialized for building tube amps or radio equipment with tubes.

They are like your regular linear PSU, but with voltages for Filament (typical low voltages 1.2-24v / 6.3v) and 0-400v for High voltage supply for the Anode/grid/Cathode supply.

It went up in smoke last time I fired it up, and I found the old paper caps to be dry, so I've just rewired the whole thing, haven't fired it up yet, but thought I'd show it to you guys before I blow it up. /s

I’ve been watching YouTube videos lately of people repairing ps4 ps5 and other consoles and I thought I’ll give it a try. Bought all of the necessary stuff to get me started and this I’d my first swap on a PS4.

Everything works fine and sold it the same day.

So I’m making a Arduino controlled pwm fan controller that has a temp sensor and I thought my fans drew 0.6 W combined but obviously not (see attached image)

I built this custom 6-screen world clock powered by an ESP32.
Each 3.2” TFT display shows a different city’s local time, all synced via NTP.

The hardware part (soldering + wiring) took about 8 hours,
but writing and testing the firmware took much longer — around 1000 lines of custom code handling timezone logic, NTP sync, and display control.

It runs on a TRACO 12V→5V converter and sits in a CNC-cut aluminum enclosure I designed and assembled myself. It also includes a simple web interface for diagnostics and editing the city/timezone configuration
Works great so far!

(First picture: 90% finished clock(missing sideframe, bolts) Second: spaghetti)

This is probably pretty common since there are 8 (EIGHT!!!) of these inside a cheap Samsung monitor, still, found it really impressive that this is (1) possible & (2) economically viable.