Archive for May, 2008
Capacitor meter
The capacitor meter presented here can measure capacities between 100pF and 1uF on five areas of measurement, more we can say multimeter or tester.
Circuit consists of an oscillator with variable frequency, a divided frequency and measurement stage. The Oscillator is based on a inversor from a 74HC14 and generates a frequency f inversely proportional [...]
Talk Over circuit schematic
A very usefull talk over circuit which you can use in your radio stations, club or anywhere you want to speak over music without any movement of potentiometers. Just talk in your microphone and the music level will drop accordingly to your voice.
Talk-over circuit schematic:
UUS 65 - 73 MHz fm transmitter
A basic UUS 65 73 MHz fm transmitter circuit schematic which can be used as uus oscillator with no explanation …
65 - 73 MHz transmitter ( oscillator ) circuit components:
L1 = 8 t / 0.3mm / 6mm
L2 = 8-12 t / 1mm / 15mm / 1mm gap
SRF = 60t / 0.2mm / 3mm / [...]
