4046 Alarm Clock (CB25768E)

This circuit uses a PLL4046 oscillator to excite a piezoelectric ceramic. The circuit is from an October 1994 Electronics Now magazine.

| Clique na imagem para ampliar |

Differential Amplifier (CIR18634E)
In the figure we have the conventional configuration of a differential amplifier with the...
VU-Meter (CB10589E)
This circuit was published in an English magazine from 1977, but it can be easily assembled since...
Astable Multivibrator (CB12196E)
This circuit generates rectangular signals at a frequency determined by R2, R3, C1 and C2. See the...