Arduino projects, circuit design, PCB development, and electronic prototyping tutorials
A STEM kit for building a small catapult (stone thrower) that can be controlled by a Micro:bit or ESP32 board, using servos and sensors.
Altium's perpetual license cost is hard to justify for intermittent consultancy work. KiCad 8's hierarchical schematic and constraint manager close most of the gap.
Complete guide to creating a real-time IoT dashboard that monitors temperature, humidity, and motion sensors using ESP32 microcontrollers and a modern React frontend.
Master the art of high-speed PCB design with comprehensive coverage of signal integrity, power distribution, EMI reduction, and advanced routing techniques for modern digital systems.
A RTL-SDR v4 plus a cheap active GPS antenna can discipline a local oscillator to sub-microsecond accuracy. The software stack is the hard part.
Three open-source RISC-V soft cores with different performance, resource, and feature trade-offs. A comparison targeting a Lattice ECP5 device with constrained LUT budget.
The new constraint engine and interactive router improvements in KiCad 7 are real productivity wins. The footprint wizard regressions are equally real.
PoE 802.3bt (Type 3/4) delivers up to 71 W over a single cable. The PD controller, isolation topology, and thermal design for a compact sensor node.
Energy harvesting enables battery-free IoT nodes. The harvested power budget for each source type and the supercapacitor sizing math that determines whether your node runs continuously.
A $300 thermal camera paid for itself in the first week. Hotspots, bad solder joints, and a regulator running 40°C above its expected temperature.
Pre-compliance EMI testing with a $400 SDR and a near-field probe set tells you more than you'd expect — and less than you need for a formal chamber test.
The Nordic Power Profiler Kit II samples at 100 kSa/s and overlays current measurements on a timeline. Capturing the 8 ms peak during a BLE connection event and the sleep floor.