electronics – Page 2

Buying 2nd hand “vintage” Hi-Fi on eBay – buyer beware

Bought an old Hi-Fi from eBay – seller listed it as “used” (meaning it works OK but might have some cosmetic damage). Turns out it was faulty. D’oh.

Reading a 27C512 EPROM with a Raspberry Pi – ROM-dumping!

Using Raspberry Pi GPIO to read the contents of an old 5V CMOS ROM

Minidisc copybit stripper – the Elektor SCMS killer

Defeating SCMS copy-control restrictions in digital minidisc-to-minidisc copies using the infamous Elektor copybit killer from 1998

Technics RS-B665 Cassette Deck Remote Control

Cassette deck with lid removed showing internal electronics

Creating a remote control for a 1990s tape-deck using raspberry pi, python, node-red and some relays. Features minimal hardware hacking of the tape deck itself… 😉

Tiny Oscilloscope kit based on STM32F103 ARM microcontroller

I discovered this tiny oscilloscope kit the other week. It’s a DSO138 by JYE Tech – £30 from Amazon(UK) or less than £20 if you can wait for delivery from China 🙂It took me less than 2 hours to build and worked first time! I’ve still got some soldering skills lol. It comes in twoContinue reading “Tiny Oscilloscope kit based on STM32F103 ARM microcontroller”

Replacing the white LED stylus target light on Audio-Technica AT-LP120X

I recently bought a new turntable, the Audio-Technica AT-LP120XUSB. I wanted direct drive, decent mid-range quality (didn’t need the absolute highest spec due to my ageing & damaged hearing – I blame the school discos of the 1980s, and Roni Size gigs 😦 ) and USB built-in so I could hook up recording/streaming devices. IContinue reading “Replacing the white LED stylus target light on Audio-Technica AT-LP120X”

Grafana, Influxdb & telegraf based home temperature monitoring with Raspberry Pi and the humble DS18B20

Creating a temperature monitoring dashboard in Grafana to display temps from sensors all around the house. Running on Raspberry Pis and using the venerable DS18B20 one-wire sensor.

Flashing LEDs with a 555 timer – and not a lot else

Just dug this out of storage – some electronics I made in the late 80s/early 90s. Most of it is old/scrap components that were lying around on my desk – only the (socketed) 555 and MC14526 counter/divider actually do anything; flashing the LEDs along the edge. I can remember making it at work during quietContinue reading “Flashing LEDs with a 555 timer – and not a lot else”