Figure 4 NE555 test setup: schematic, scope traces, and layout. The 555 Second Version was never built. The ZSCT1555 has been discontinued. But the NE555, after fifty years—and ten years after Hans ...

Here is an interesting hobby circuit of a “crank” door bell! The circuit is built around a timer 555 and a musical piezo-buzzer. The circuit works off 9 volt battery supply. One 9volt PP3/6F22 compact ...

(Video, embedded below.) The circuit is simplicity itself, just an astable of the type that has made a billion beepers and flashing LEDs.

Buying the right camera, lens, accessory or software to suit your photography is really important. Our product reviews offer independent views with hands-on opinion and honest verdicts aimed to ...

It has become a bit of a running joke in the Hackaday community to suggest that a project could or should have been done with a 555 timer. [Tim] has rather taken this to heart with his latest Elect… ...

From lens focal lengths and fill-flash to portraits, macro or stunning landscapes there are techniques for everyone. Learn how to use metering, considering composition and shoot everything from ...