| Submitted by: Bertram Bradlwarter.
| Submitted by: Bertram Bradlwarter.
| Ever heard of 1GΩ resistors? The 555 timer here has a duration time of about 270s; by using a high resistance value of 1GΩ, no electrolytic...
| Ever heard of 1GΩ resistors? The 555 timer here has a duration time of about 270s; by using a high resistance value of 1GΩ, no electrolytic...
| The timer presented here is designed to look like and mimic a classic sandglass and should need zero explaining to your kids, the operation...
| The timer presented here is designed to look like and mimic a classic sandglass and should need zero explaining to your kids, the operation...
| The timer presented here is designed to look like and mimic a classic sandglass and should need zero explaining to your kids, the operation...
| 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...
| 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...