| Need a spirit level (i.e., bubble level tool)? This inexpensive aid for a spirit level gives an acoustic and optical indication when the air...
Wouter Eisema (7)
| This simple seismic detector circuit generates acoustic and visual alarms when it detects a shock, vibration or earthquake. It also has a re...
| Not much is required to detect the state of a switch or contact from a distance if you use cheap, ready-made modules that operate in the LPR...
| Wireless energy transfer is the future! With this small experimenting set you can explore this technology yourself! Very little is required...
| The author designed this tester for IR-remote controls as an excuse to experiment with a GoldCap. Of course there are simpler ways to test a...
| This aid for a spirit-level gives an acoustic and optical indication when the air bubble in the vial of the level is exactly in the middle....
| This simple circuit generates acoustic and visual alarms when it detects a shock, vibration or earthquake. It also has a relay that can be u...