I've built a standard variable frequency oscillator circuit using NE555. The supply voltage is 14.8 volts, output is around 12.6 volts which is acceptable for my application the only drawback was the out frequency was too low (just few Hz).
I replaced the 47 micro electrolytic capacitor connected to pin 6 with 0.1 micro and the variable resistor between pins 7 and 8 from 5k to 1M and I got the required frequency range (70 to 1200 Hz) but the output voltage dropped to 4.7 volts!!
I need to maintain the frequency range and an output voltage no less than 10 or 11 volts (or higher if possible).. any suggestions?
I replaced the 47 micro electrolytic capacitor connected to pin 6 with 0.1 micro and the variable resistor between pins 7 and 8 from 5k to 1M and I got the required frequency range (70 to 1200 Hz) but the output voltage dropped to 4.7 volts!!
I need to maintain the frequency range and an output voltage no less than 10 or 11 volts (or higher if possible).. any suggestions?