Divide-circuit

Posted on Jan 26, 2013

An input signal drives both SN74 74 D-type flip-flops, which are positive edge-triggered devices. A low-to-high input signal transition triggers tbe A flip-flop, while a high-to-low input signal transition triggers the B flip-flop via tbe SN7404 inverter. Either flip-flop in tbe high state will cause the output to decrease via the SN7402 NOR gate. This in turn disables the opposite flip-flop from going to tbe high state. The flipflop in the high state remains there for one clock period, then it is clocked low. Witb both flip-flops low, the output increases, enabling the opposite flip-flop to be clocked high one-half clock cycle later.

Click here to download the full size of the above Circuit.

This alternate enabling and disabling action of the flip-flops results in a divide-by-1112 function. That is, three clock pulses in, produce two evenly spaced clock pulses out. The circuit has no lock-up states and no inherent glitches. Replacing the NOR gate with an SN7400 NAND gate inverts the A, B, and output signals. By adding simple binary or BCD counters, counting chains, such as divide-by-3, -6, -12, -24, -15, -30, etc., can be generated using the divide-by-11/z circuit as a basis.

Leave Comment

characters left:

New Circuits

Zero consumption Anti-theft High power Code Switch for E-Bike Batteries

This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
Ultrasonic distance finder circuit

The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Simple Metal detector circuit with CD4030

Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Fully automatic watering circuit for flower pots

Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
Simple deep searching metal detector circuit

The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
Sub-Harmonic Bass Converter for Electric Guitars

The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
Echo Depth Sounding Sonar for Boats

In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
100W HiFi Audio Amplifier Circuit

This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
Plant-Pot Water Level Indicator Circuit

A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....

Create NOW your QR MENU for your Restaurant / Hotel / Bar / Caffe,

Comprehensive ordering/paying features. fully personalized to suit your Business.

Update Anytime! Easy and Simple!

Popular Circuits

Direct Injection Box for Recording & PA

A Direct Injection (or DI) box is a very handy piece of equipment for any public address rig or...

Digital-frequency-window

This circuit detects frequency variation above or below preset limits. IC1 is a binary counter...

diy tremolo effect circuit

This tremolo effect circuit uses the XR2206 and the TCA730 IC which is designed as an electronic...

Computer Off Switch

How often does it happen that you close down Windows and then forget to turn off the computer...

Signal Conditioners Information

Signal conditioning is a set of operations performed on a signal that makes it suitable for...

Interfacing to LVDS with the NI 655X Digital Waveform Generator/Analyzer

The NI 655X is a versatile high-speed digital product that can interface to many different...

Constitute a CMOS circuit time adjustment of a spot welder

Constitute a CMOS circuit time adjustment of a spot welder The number of cycles it uses CMOS...