The Pinecil LED Ring adds three LED lights to the Pinecil soldering iron to improve soldering in dark environments. This addition to the Pinecil soldering iron fits just above the soldering tip on the plastic area by friction so no glueing is required. It is easy to assemble and add to the iron using another soldering iron to connect the internals.

A type of indicator circuit for batteries

Arduino is still a good learning platform.

This is a light bulb indicator kit that blinks with music.

Using this electronic circuit, a very simple pulse generator can be made, using a 4066 circuit.

The project represents an electronic switch actuated by the value of the light intensity that excites a photoresistor.

Monitor for equal voltage at the terminals of two 12V batteries.

Another electronic project.

Simple electronic circuit.

A balance indicator for audio systems.

Famous Actidamp Mk2 phono preamp construction excellent in audio quality, redesigned for modern parts.

Clock without any integrated circuits, only transistors, diodes and other common parts. Probably the biggest DIY electronic kit in the world - 596 diodes and 221 transistors. PCB size 48.5 x 37 cm, digital and binary clock.