To experiment with RF and a VNA a clever designed test-board kit exists so i ordered one. https://www.sdr-kits.net/DG8SAQ-VNWA-Testboard-kit...

Some time ago i ordered some cheap 600:600 ohm audio transformers to use them for some experiments. To easy wiring up an experiment it is po...

Mailbag August 2019 i published how to make SMD leds breadboard friendly with Dupont connectors.   https://blog.jeronimus.net/2019/08/sm...

I wanted to do some easy prototyping with SMD leds (and other components). SMD components are available in different (small) sizes. One of...

To get more experience with SMD soldering i build this led chaser. The circuit of this running light consists of a 555 timer to make pulses...