| This RJ-45 cable tester automatically checks cable continuity and tests the connection configuration. Each of the eight connections is check...
More about Circuit (708)
| The author ‘just wanted to do a bit of microcontroller programming’. However, the project rapidly grew into this impressive and visually att...
| The author wanted a very cheap and simple alarm for some of his possessions, such as his electrically assisted bicycle. This alarm is based...
| As long as the AC power grid does not carry too much interference, power line carrier communications (PLC) works very well in homes with sin...
| Thumbwheel switches are remarkably expensive and always playing hard to get. Here’s a cheaper, digital equivalent with the ability to rememb...
| For load currents up to 4 A the author has used a bistable relay to disconnect the load on a 12 V battery to avoid deep-discharge. How can w...
| The electronic game Simon comes in the form of a large, round console with four red, green, blue, and yellow illuminated buttons. These butt...
| If you want to check the behaviour of an electronic circuit at low voltages, an adjustable power supply as shown here may be helpful. Powere...
| This sensor is particularly suitable for use in small spaces, such as the petrol tank of a motorbike. It has the advantage of not having any...
| In microcontroller circuits quartz crystals provide the highest accuracy for keeping everything on frequency. With frequency and time measur...