Mini versions of ESP modules become more and more widespread, but their soldering is harder.

Using custom probes for charging smart watch/band without special magnet cable.

Simple and reliable method of board-to-board (B2B) connection using right-angle terminals and screws.

Experience of using modern I2C charger BQ25895without battery.

How to avoid getting into trouble when using EN pin of boost DC-DC converters.

Modern power banks supports fast charging protocols with higher voltage/current. Let's see how chosen protocol affect of total delivered energy to the device.

Easy fixing BQ769202 AFE Arduino library by force disabling CRC.

Just photos of old power bank design using 100x100 2L boards and many LEDs.

Let's look inside cheapest ebike 48V LiIon battery charger — minimum components, but but it performs its functions.

Analysis of existing affordable solutions of fully integrated interface isolators with power in tiny packages.

Quick review of modern nanocrystalline cores that now available for any engineer.

Affordable smart capacitor-based activebalancer from JBD. Full teardown and components identification.

I have two variants of battery holder, so footprint's holes too close to each other, let's write custom rule to correctly handle KiCad violation.

You might seen such especial white glue on many electronics boards, now it's available even for DIY, so let's check it.

Laptop chargers USB-C PD 100W became widespread, so why not use it for charging small electrical vehicles batteries?