Reddit:Electronics

I do have 2 Hakko FX-100 one for micro soldering and one for bigger tips. They have more than 6 years of almost daily use. But everywhere I go nobody seems to know they exist. To me, old JBC and Weller user, are the holy grail of soldering, the tips are lasting years and they do heat up in couple of seconds, handling thermal grounds like a champ. BTW I did buy mine years ago and they were less than half of what they cost now (WTF)

Since I got taught a lot of new things with my last post, here's another fun peice in my collection. An XM22 Automatic Chemical Agent Detection alarm another chonky over engineered peice of tech that will last forever

It's your old basic digital clock project but with simple gates made of diodes and transistors.

Left - minutes 00-59 logic with 7490s and diode-transistor logic

Middle - PCB for hour 00-23 logic

Right - 1Hz clock module with 4060 counter and transistor divide-by-2 latch and "pseudo-sawtooth" output

Picked up this DARPA translator today and busted it open to view the shiney bits

build + demo: https://youtu.be/7fNYj0EXxMs

The menu is navigated using a rotary encoder, and each channel has an LED indicator.
Two lights can be set to either automatic or manual mode independently.
The air pump operates at 30 Hz, and its duty cycle can be adjusted from 10% to 20% in 5% increments, super silent! (The bobbin was rewired to work with DC.)
The water pump can be toggled on or off for maintenance purposes.
A DS3231 real-time clock is used, powered by a custom lithium-ion backup battery with integrated charging circuitry.
An AT24C32 EEPROM is used for memory storage.
The software is developed using the Arduino IDE.

I've been wanting a curve tracer for some time, but I don't like the prices for "vintage" commercial equipment. I learned about the "Octopus" just recently and decided to give it a go.

It still needs final touches, like mounting the transformer with double sided tape and adding a fuse, but otherwise it is done.

I used the design found on qsl dot net.

It seemed dead simple and there's always room to perform mods, like adjustable voltage and current. For now, we'll see how this works out.

I built the BOM on mouser for under $60 shipped. Some items like the power cord, pomona test clips, and proto board I already had on hand. I used a drill press to drill the front and rear panels. I used MS Paint to create templates for drilling the banana jacks, power switch, and BNC jacks.

Anyway, fun stuff! We'll see which of my scopes will do the best job.

Two desiccant packs, humidity indicator, ESD bag and bubble wrap… for 2.54mm IDC headers!!!

Probably a touch overkill haha!

Components 1.100uf ,100v capacitor 2.bc547 transistor 3.4.7k resistor 4.inductor :value unknown cus I grab it off a computer power supply 5.1n4007 diode

It also makes this high frequency ringing when it's on like some scifi thing .

Recently placed an order with JLCPCB, and they sent an X-Ray of the board. It's for an LGA CAN transceiver with isolated power-CA-IS2062A. The transformer windings can also be seen.

I have made a schematic of analog FM receiver!!

This is my final semester at community college. I wil be attending a 4 year university this fall, as a junior, to finish off my bachelor's in electrical engineering. My final project is an analog function generator. It is capable of generating a sine wave, triangle wave, and a square wave. It is based on an online project called "Analog Function Generator" by "laserjocky". The circuit consists of op-amps, resistors, capacitors, transistors, potentiometers, and switches. The images are of the initial wave created by a specific op-amp and the final wave generated at the final output.

Here's a new interesting addition to my collection of Soviet equipment - the G2-57 hardware true RNG. Didn't expect it to be so packed inside, but I guess you need a lot of circuitry to provide basically anything you'd want from an RNG. This device outputs: 1. Binary random signal with adjustable amplitude and bit width, with ability to generate endless random signal or repeating random patterns of up to 21 bits. 2. Analog random signal with gaussian distribution and adjustable frequency range. 3. Analog random signal with continuous uniform distribution and adjustable frequency range.

Followed this link:
https://www.circuits-diy.com/simple-flashing-led-using-transistors-led-flasher/

The size of a small pencil. Can be carried anywhere. No IC, just TTL. Making 3D printed case for it too.