microcontrollers
Olimex Level Shifters Fix 3.3V to 5V Breadboard Headaches
Olimex's two new open hardware level shifters translate 1.65 V to 5.5 V on I2C, SPI and UART. Here's where they fit on your…
microcontrollers
RP2350 Laser Attack: Ledger Donjon Re-Enables Debug
Ledger Donjon used a laser and about $250,000 of lab gear to re-enable debug on a locked RP2350-A4. Here is why Raspberry Pi will…
microcontrollers
Toshiba TXZ+ M4H: 120 MHz Cortex-M4F Entry-Level MCU
Toshiba's new TXZ+ M4H microcontrollers pack a 120 MHz Cortex-M4F, 256 kB flash, and up to 51 GPIO into an entry-class part. Here's what…
diy projects
Build an ’80s Brick Phone with a Raspberry Pi Pico and Bluetooth
A Pico, a Bluetooth HFP module, and a keypad turn into a retro brick handset that answers your iPhone's calls. Here is how it…
diy projects
LED Bubble Hair Extensions with Motion-Reactive Rain Effects
Braid 2020 NeoPixel seed pixels into hair and let an RP2040 Feather and accelerometer turn a head shake into rain and lightning. A weekend…
diy projects
Negotiator II: A Business-Card USB-C PD Bench Power Supply
Negotiator II turns any USB-C PD charger into an adjustable 5 V to 48 V bench supply on a 2 mm thick card. Here…
diy projects
Long-Range Bluetooth LE Mesh on an STM32WB07 Module
An STM32WB07 board with Coded PHY and a 20 dBm amplifier pushes Bluetooth LE to 4.6 km line of sight. Here is how to…
diy projects
H8 Mini: Build a Palm-Sized 8085 Heathkit Replica
The H8 Mini is a through-hole, 80C85-powered replica of the 1977 Heathkit H8, small enough for your palm and simple enough to solder in…
diy projects
DIY STM32 Scientific Calculator With a Memory LCD and CR2032 Power
An STM32L431, a 400x240 Memory LCD and two CR2032 cells make a graphing RPN calculator. See the power, keypad and PCB tricks you can…
arduino
AVR Laptop: 24 FPS Video and Sound on an 8-Bit ATmega2560
An ATmega2560 running FreeRTOS plays 24 fps video with sound on a 128x64 LCD. See how one maker squeezed a laptop out of an…
microcontrollers
SPIDriver Quattro: A USB SPI Debugger With a Built-In Screen
Debugging SPI blind is painful. The SPIDriver Quattro adds a live display, 0.1 mA current sensing, and quad-SPI support so you can see what…
diy projects
200 A Boost Converter: Six-Phase 12 V to 48 V DIY Build
Nick Electronics built a six-phase 200 A boost converter that turns 12 V into 48 V, using aluminum-core PCBs, copper bus bars, and an…