HIGH FREQUENCY OSCILLATOR Circuit

[Rykeir]

I need to generate random bar codes using a 555 timer operating at high frequency and connected to a pair of JK Flip flops setup as a 2-bit counter .May I ask is my circuit correct ?

[Tom__Sedlack]

I'm guessing it works since you didn't mention what frequency you were after and you have the leds blinking. The only thing i would correct is the timer running at 12V and the F-Fs running at 5. The 12V pulse from the timer will certainly destroy the digital parts if you were to build this circuit.

[Rykeir]

I found out that its say 360kHz is the absolute maximum as the 555 starts to malfunction with irregular bursts of pulses above this frequency which I get it from here ( http://www.555-timer-circuits.com/high-frequency-555-oscillator.html ). How should I knw my 555 timer is produces random pulse to jk flip flop ?

[Tom__Sedlack · Accepted solution]

You answered your own question. If you attempt to run it outside its maximum frequency, you could have irregular bursts. For reliable operation, use the 555 (or any component for that matter) within the specifications. If you need a higher frequency, you need a different design.