NE555 0-10S Delay Timer Relay Module
Sometimes you may need ready-made hardware to set up a simple timer to help you control something at the right time. No wonder, Chinese electronics have many instant solutions for that, the simplest of which […]
Self-Lock Delay Switch Module DIY
Self-lock delay switch is a simple timer module that produces a fixed square pulse. It is designed around the 555 timer and uses a tricky negative edge trigger to ‘run and lock’ the timer. The […]
Universal Pulse Extender Module
On certain occasions it is necessary to use a sensor module that generates a relatively short pulse to indicate a change of status. If the duration of its output signal is too short, the associated […]
Simple Steam Sensor Build & AHS01IB Absolute Humidity Sensor
Some time ago I was asked by a voracious reader to design a simple steam sensor switch for him. The purpose of the steam sensor switch was to turn on an electric switch when the […]