| Here’s an easy-to-build circuit to drive a solid-state relay for a period that can be selected as two, four, or six hours. This device forms...
All items tagged with Timer and Time (105)
| If you need to control something over a longer period than the standard 24 hours, you can use two timers with the second one plugged into th...
| This jogging timer emits a brief tone using its piezo buzzer indicating how many o ten-minute periods have elapsed using a series of eight L...
| The camera shutter operating system described here makes it possible to take photos at a predefined interval, or to trigger two cameras toge...
| This circuit is a tester for flywheel-based ignition systems in small aeroplane engines. Basically the same ignition coils are also seen in...
| This design came about when the author wanted better control of his 12 V solar-charged garden lighting installation. It is however a versati...
| Developing a lighting control unit recently, the author found that available analogue or mechanical timers were not sufficiently accurate or...
| Most hobbyists will have some tools that are battery-powered, such as a drill, screwdriver or power scissors. Unfortunately (and especially...
| We just love simple and practical solutions like this. The Efergy shower timer is a smart little device that let's you know how much water y...
| This circuit detects when a window is open (it can also be used with a door), indicates that the window is open by means of a red LED or a b...