Signal Generator | Electronic Project Circuits

Posts Tagged ‘Signal generator’

Compares with sound level tool

A tool that use for fine to decorate the sound of , organ , piano , have the pitch is equal. By have the accuracy is similar to with compare with the sound of the professional. But use the ability in listenning sound beat. At happen between 2 frequency sounds that confute by use origin frequency pillar circuit in 250.830 kHz frequency occurrences. For feed to reach first part of 5 IC. Which build the circuit divides by the frequency model a program.

Be the first to comment - What do you think? Posted by admin - August 7, 2009 at 7:29 am

Categories: Audio diagram, Meter Tags: Comparator circuit, Signal generator, sound level meter

Single supply Function Generator by TLC271

The circuit has both square-wave and triangle-wave output. The left section is similar in function to a comparator circuit that uses positive feedback for hysteresis. The inverting input is biased at one-half the Vcc voltage by resistor R4 and R5. The output is fed back to the non-inverting input of the first stage to control the frequency.
The amplitude of the square wave is the output swing of the first stage, which is 8V peak-to-peak. The second stage is basically an op amp integrator.
The resistor R3 is the input element and capacitor C1 is the feedback element. [...]

Read more Source:http://www.circuitsuggest.com/single-supply-function-generator.html

1 comment - What do you think? Posted by admin - July 10, 2009 at 8:18 am

Categories: Oscillator generator Tags: function generator, Signal generator

Car Burglar Alarm system with radio wave signal

When steal open automobile door relay K1 and K2 work make have voltage 12V give radio transmitter and origin sound part for mix radio waves steal will deaf anything sound. Because radio high frequency. But car owner will hear the sound , by take handbag very small radio, tune the frequency directly with the frequency of a transmitter. Which there is just not mW as a result the enough. A transmitter will still work for 15S (fix the time has with R3 and C1) although the door will open then follow thereafter radio transmitter will stop to work. Because of Transistor stop bias relay contract K2 be scratched. The transistor that use must durable current change relay get. If use battery separate separately and use an antenna model to draw start up the motor this use within a car , steal will can not cut the work has of from the outside.