#620 Glowing Star SMD Practice Board
Testing the Five-Pointed Star SMD Practice Board with LM358 oscillator LED effects.
Here’s a quick demo..
I’ve seen this Five-Pointed Star Breathing Light DIY Kit around for some time, and finalled shelled out a $1 or so to try one out.
It’s maybe a change from the typical 4017+555 circuits used in these SMD soldering kits!
It is quite a nice little practice board for SMD soldering - or perhaps you are just after a twinkling star!
The circuit is a simple OpAmp triangle-wave oscillator using a high-side NPN transistor to drive the LED array.
The Q1 base voltage over time - showing the triangle wave:
Haven’t done any hot air work for a while. Thought I’d do that rather than hand-solder. All good…