Raspberry Pi Zero: the $5 computer
https://www.electronics-lab.com/raspberry-pi-zero-the-5-computer/
Raspberry Pi has announced a really cheap micro computer priced at only 5$. You can even get it for free with the December issue of MagPi magazine. Raspberry Pi Zero runs Raspbian and main features are: A Broadcom BCM2835 application processor 1GHz ARM11 core (40% faster than Raspberry Pi 1) 512MB of LPDDR2 SDRAM A micro-SD […]
Protecting the USB from over voltage and overcurrent threats
https://www.electronics-lab.com/protecting-the-usb-from-over-voltage-and-overcurrent-threats/
An application note from Littelfuse about USB protection. This application note addresses the various requirements for protecting the Universal Serial Bus (USB) from overcurrent and overvoltage environmental threats. The solutions presented cover both USB 1.1 and the higher speed USB 2.0 circuitry. Specific emphasis is placed on USB 2.0 with information directed at hot connection […]
A development board for the STM32F042
https://www.electronics-lab.com/a-development-board-for-the-stm32f042/
Andy Brown designed a development board for the STM32F042 in the TSSOP20 package: This project came about because I’m using the STM32F042F6P6 (32Kb flash, 6Kb SRAM) in another project where I’m creating a USB device and the first thing I did is try to obtain a development board for it. I was hopeful that ST […]
Choosing $1 sound card for DC-capable low speed oscilloscope
https://www.electronics-lab.com/choosing-1-sound-card-for-dc-capable-low-speed-oscilloscope/
Tomasz Ostrowski has tested some cheap USB sound cards as low speed oscilloscope interfaces/recorders. He writes: I’ve tested some cheap ($1) USB sound cards for DC sampling capability, in particular for using as low speed oscilloscope/signal recorder. Some (http://tomeko.net/dsoundscope/c_media.php or one from this thread: http://www.elektroda.pl/rtvforum/topic3106124.html) don’t seem to work despite removing DC blocking capacitor, but […]
SDM3055 FW Upgrade, YZXstudio Black USB Power Monitor
https://www.electronics-lab.com/sdm3055-fw-upgrade-yzxstudio-black-usb-power-monitor/
In this video: mjlorton tests the latest firmware from Siglent for the SDM3055 bench multimeter A quick overview of the Fluke TiS10 (vs Ti90) thermal camera A look at the YZXstudio Black USB Power Monitor (with optional bluetooth module) that Frank Tong sells on his eBay store SDM3055 FW Upgrade, YZXstudio Black USB Power Monitor […]
USB PIC Programmer
https://www.electronics-lab.com/usb-pic-programmer/
Stefano Purchiaroni rebuild a USB PIC Programmer that he found online. He writes: This page is dedicated to everybody needs to program a PIC (Microchip) device via USB port. Looking on the web for ready-to-use projects, I found a good one called Open Programmer, coming with several schematics, PCBs and Open Source code. The original […]
PIC24 bedside table alarm clock
https://www.electronics-lab.com/pic24-bedside-table-alarm-clock/
Markus Gritsch posted pictures and code of his PIC24 bedside table alarm clock: Another year, another clock, but for the first time for my alarm clocks. I am not using an MSP430 but a PIC24 instead. Standby current is with 5.5 µA only slightly higher than that of my MSP430 based ones. Time keeping is […]
LiFePO4 charger
https://www.electronics-lab.com/lifepo4-charger/
Markus Gritsch shared his LiFePO4 charger project in the forum: Since I really like using LiFePO4 AA and AAA batteries in some of my projects, I finally gave in and built a dedicated charger for them. Previously I used a lab power supply to mimic the constant current/constant voltage charging curve, which worked also fine. […]
Open source pocket USB oscilloscope; 30 MHz, multi-platform
https://www.electronics-lab.com/open-source-pocket-usb-oscilloscope-30-mhz-multi-platform/
by Graham Prophet @ edn-europe.com: Running on Apple iPad, Android, Microsoft Windows and Linux, LabNation’s (Antwerp, Belgium) open source USB oscilloscope, SmartScope, is the result of a Kickstarter campaign commenced in 2014 – the project raised 645% of the funding goal within 30 days. Believed to be the first test equipment designed to run on multiple […]
Miniscope v2f
https://www.electronics-lab.com/miniscope-v2f/
Here is another variant (after miniscope v2a, b, c, d, e) of simple PC/USB oscilloscope/recorder: http://tomeko.net/miniscope_v2f/ It extends miniscope v2e with PGA (MCP6S21) offering same sampling frequency (480 ksps, 8 bit real time streaming to PC allowing continuous recording up to 512M samples) but 8 gain ranges and high input impedance. Estimated price is $6 […]