Wide-frequency-ttl-clock


Posted on Jan 22, 2013

This free-running TTL square-wave oscillator has a variable frequency output over a 20:1 range or better through use of four of the six inverters in an SN7404 chip and the additional components shown. Frequency of oscillation is determined by the capacitor and the settings of potentiometers R2 and R4; the first pot controls width Tl and the second controls width T2 of the square-wave output.


Wide-frequency-ttl-clock
Click here to download the full size of the above Circuit.

These adjustments are not completely independent.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

White LED Drive Circuit
9-Bit-cmos-converter
Digital Clock
Sound-Activated Lamp (Relay/Switch)
ADM660 Charge Pump Voltage Inverter Circuit Configuration and Datasheet
Bi-directional motor
Gas Leak Detector Circuit
TV Decoder
Simple Morning Alarm Circuit Using LDR and UM66
2Digit up/down Counter
A Dozen Small Battery-Powered Alarm Projects
Automatic washing machine motor driver schematic



Top