Circuit diagrams for radio amateurs
Amplified Ear
31.03.2016
| Audio
circuit diagram Parts:P1 22K Log. Potentiometer (see Notes)R1,R9 10K 1/4W ResistorsR2 1M 1/4W ResistorR3...
Stable GPA
22.08.2015
| Generators, heterodynes
The scheme has good stability of both frequency and amplitude signal. Actually the generator is made on transistors VT1-VT2. Transistor...
Simulator siren sound
19.04.2015
| Bells and audio simulators
Electronic simulator, schematic diagram of which is presented on Fig. 1, mimics the sound of a siren. The device...
Low pass filter - Subwoofer
31.03.2016
| Audio
Note: The text is AUTO translated from Greek The acoustic spectrum is extended by very low frequencies 20Iz and...
Audio indicator
19.04.2015
| Indicators, detectors
When designing various automation devices and alarm happens need a sound indicator of the state of any node. Often, this...
