Earlier this year, Finnish startup Donut Lab grabbed headlines after claiming it had developed the first production-ready solid-state EV battery capable of charging in about five minutes. The ...

Finnish startup Donut Lab has just released the third independent test of its solid-state ...

Basically, VTT hooked up Donut Lab’s to a battery tester and left it idle for 10 days, while measuring the voltage every 10 seconds. According to the results, the cell demonstrated high stability, ...

A DIY PCB fixture using split-Kelvin technique enables accurate, repeatable LCR measurements for low-impedance SMD components.

Donut Lab released the third independent test of its controversial solid-state battery, this time trying to prove it's not a ...

The startup's third test evaluates whether its solid-state battery is actually a supercapacitor. Here's what the results say.

Abstract: In this paper, a bended differential transmission line using the asymmetric coupled line (ACL) with surface mount device (SMD) capacitor is proposed to suppress the common-mode noise. The ...

Abstract: This paper presents both theoretical and numerical analyses of the piezoelectric and dielectric responses of a highly idealized film-on-substrate system, namely, a polarized ferroelectric ...

Checking up on the claims of water filter makers can be a discomfiting maze. Here's how to verify independent water filter certifications.

In this project, I'll make a small circuit capable of controlling a servo, it is a servo tester made out of a 555 timer IC. In the process of making this circuit, we'll make a pcb design for it. This ...