jacky March 8, 2012 1 Comment
Here is a simple variable frequency circuit based on timer NE555. Here NE55 is wired as an astable multivibrator, whose output frequency can be varied by varying a potentiometer. This circuit is a must in the work bench of a electronic hobbyist. Frequencies ranging from several Hz to several KHz can be obtained using this circuit. For very low frequencies (few Hz) replace C with a higher value electrolytic capacitor. The low frequency oscillator schematic is shown below.
Circuit diagram with Parts list.
The values of R and C can be obtained using the following equations.
1/f = 0.69 C ( R1 + 2R2).
% duty cycle = 100(R1+R2)/(R1+ 2R2) .
The good option is to select R1 in K Ohms and R2 in M Ohms.
Related newsOsvaldo aparecido siqueira benfica
Jamaica avenue queens directions to and from
Bruno henrique ferreira marques dos santos
7 15 quetzalcoatl bird
External facility request form arlington county fair
Teropong bumi berakomodasi maximum drywall
Cirque du soleil michael jackson auckland 2019
The bachelorette ali y roberto porque terminaron shakira
Board of directors meeting etiquette ground
Boutique bel air