Two New Designs

Just when you think you are all washed up ... I am pleased to see that two of my electronic designs are published in the July 2026 Silicon Chip Magazine: 

1. Random Traffic Lights, and 

2. A Proximity Sensor. 

They both have special features. At the push of a button, the Traffic Lights randomly fail (a nice South African touch), and the Proximity Sensor is diode-based: by using reversed diodes for a potential divider, an op-amp input becomes very sensitive to the nearness of a human body. I took the photo of South African traffic lights in Thembalethu.