Intermittent Oscillator or Siren (CB18276E)

The basic siren configuration shown in figure 1 activates a piezoelectric transducer and can be used as an alert or warning device.

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Basic Monostable Using the 7555 (CMOS) (CB120E)
The CMOS TLC555 [equivalent to the bipolar 555] can be used as a monostable in the configuration...
Pocket Signal Generator (CB13159E)
This unijunction relaxation oscillator can be used as a very useful signal injector. The circuit is...
Sound Level Meter (CB15831E)
A low frequency or audio frequency generator is an almost indispensable instrument in which it...