Reddit:Electronics

I mean atleast it didn't blow up... I really should've gotten a pcb...

I need a switch that can handle some power and don't have the patiance to wait for it from shipping, so what do we do? We take out the key ignition with bonus volt meter that's ment for escooter to be able to start it and shut it off with a key.

Recapping an Apple IIe and the size difference blew me away.

Figured someone might enjoy this 🤷🏻‍♀️

Fo

My dad built this into a Snap-On tool case back in the 80s. I'm currently working on a PCB design so he can put together a new one.

FCC ID: 2AN9S-TPX00227

Arduino’s upcoming Nesso N1 has appeared in a recent FCC filing, offering one of the most detailed looks at the device so far. Although the board has been announced, it has not yet reached retail, and the filing confirms that development is nearing completion. The documents include complete schematics, which is uncommon and provides an unusually transparent view of the design.

The Nesso N1 is based on an ESP32 C6 controller with support for Wi Fi, Bluetooth Low Energy, and LoRa at 915 MHz. It includes a 1.14 inch color touchscreen, detachable antennas, a BMI270 motion sensor, Grove and Qwiic expansion ports, and a built in 200 mAh battery for portable use. Internal and external photos show a compact layout focused on prototyping flexibility.

Tonight I've sawn a to220 insulated mosfet, so It can fit where i want

This is a stereo audio amplifier for my car, and that MOSFET will turn switch the whole module on with the electric antenna signal

Found out that the FCC basically lets you peek inside almost any device that emits RF energy. looked into a few cool products, then spent a bit too much time combing through filings that ended up becoming a huge photo set. Here are a few examples!

Holy cow, it's huge, it covers everything! These are just a few random pages. I already learned a lot.

My god.

Thought you might like this little circuit that drives an usual neon bulb. Difference from usual bulbs you salvage lies in the fact that the bulb must not have a resistor attached. I removed mine from the neon bulb fuse-like package. For anyone wondering, I found this in an old probing screwdriver that broke.

Transistor + phone charger transformer + a resistor. Take time to measure the coils. My multimeter isn't precise at all but I measured the coils to be 0.6, 1.2 and 6.7R. Once I measure it better, I will post the results but all three that I built have approximately the same ratios between them.

I am providing a bare schematic, the rest of the components on the boeard are a tactile switch, li-po charger and a battery connector.

Interesting thing is that the voltage accross the bulb is polarized and only one side of the bulb lights up (negative I believe).

I love the circuit and the vibe and I hope I'm not the only one.

not able to add video

This is my 555 timer circuit in action.The green waveform shows the capacitor charging and discharging, while the yellow trace flips high and low each time the voltage crosses its thresholds. It’s a simple demo, but it illustrates how analog voltage turns into digital logic. (Still learning)

I was digging through some old stuff and found a PCB from a mouse I'd saved long ago specifically because I knew it was possible to read images from them. The new project itch struck and after 65 hours, I made this!

Features:
- Sensor 30x30 pixels, 64 colors (ADNS-3090 if you wanna look it up)
- Multiple shooting modes (single shot, double shot, quad shot, "smear" shot (panorama), and cowboy), plus bonus draw-on-the-screen mouse mode that uses the sensor as intended
- Multiple color palettes
- Can lock/unlock exposure, auto-locks for the multi-shot modes
- Stores 48 pictures in a 32kB FRAM, view and delete photos
- Rudimentary photo dump to computer via Python script and serial port
- A few hours of battery life

It was a fun design challenge to make this thing as small as I could, the guts are completely packed. There's a ribbon cable connecting the electronics in the two halves, I tried to cram in a connector (0.05" pitch header) but it was too bulky to fit.

The panorama "smear shot" is definitely my favorite mode, it scans out one column at a time across the screen as you sweep the camera. It's scaled 2x vertically but 1x horizontally, so you get extra "temporal resolution" horizontally if you do the sweep well.

The construction style is also something I enjoy for one-off projects. No PCB, just cobble together stuff I've got plus whatever extra parts I need and design the case to fit. If I ever made more I'd make a board for sure (and it would shrink the overall size), but it's fun to hand-make stuff like this.

Despite the low resolution, it's easily possible to take recognizable pictures of stuff. The "high" color depth certainly helps. I'd liken it to the Game Boy Camera (which I also enjoy), which is much higher resolution but only has 4 colors!

I tried to post a video for you all but they're not allowed here. :( I'll link it in the comments once I cross-post to another subreddit.