Klee Sequencer Circuit Theory of Operation

Posted on Feb 6, 2014

Clock and Load functions, with Load being the first function described. U5, CD4013, performs the load function by controlling whether the shift register ICs are in the parallel or serial mode. For 99. 99% of the time, the shift registers are in the serial mode. In the serial mode, each shift register will cycle bits through the register, left to right. With each clock pulse, the

Klee Sequencer Circuit Theory of Operation

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

bit present on the serial input of the shift register will enter the shift register, and the bit present in the eighth position of the shift register will pass out of the shift register. In the parallel mode, each shift register will "look at" the bits programmed on its parallel inputs. The pattern switches set these bits. The switch to and from the parallel mode is a very fast operation - this mode looks at the bit pattern programmed by the pattern switches only long enough to load the data, then the shift registers revert back to serial mode. Two shift register control signals are generated by U5. When the PSA signal goes high, it puts the shift registers in the serial mode. Immediately afterwards, the R Async signal goes high. When R Async goes high, it clocks the parallel data into the shift registers on its rising edge. Nearly as soon as it goes high, R Async goes low, which in turn causes PSA to go low, which puts the shift registers back in serial mode. The CD4013 calls these shots, and it is told to do so by the rising edge of a pulse applied to the clock pin of its first stage (pin 3). There are three events that can produce this triggering event: The rising edge of the signal applied to U5, pin 3, clocks the first section`s Q signal (pin 1) high. This pulls the PSA signal high. When PSA is high, the two shift register ICs are put into the parallel mode. When PSA ("Q" pin 1 of U5) transitions from low to high, the...

Visit page

Leave Comment

characters left:

Related Circuits

12V Battery Checker Circuit

This is a 12V battery checker circuit that uses 3 LEDs that light up at their respective voltages. The red LED lights up when the battery voltage is between 8 to 10V, the orange one at voltages...

230V Flasher Circuit diagram

This circuit operates with 230v. you can use this circuit to decorate your parties. I think this will be a wonderful circuit to you all. Here DIAC ER 900 and Triac BTW 11-400.

Automatic light activated switch circuit

The circuit can be used for switching OFF a particular lamp or group of lamps in response to the varying ambient light levels. The unit once built can be used for switching OFF a lamp when dawn...

BC548 Heat Sensor Diagram Circuit

Heat sensor circuit can be used to control any device using heat sensor. In this circuit a thermistor and a resistance is connected in series. This arrangement makes a potential divider circuit....

GSM CELL PHONE JAMMER SCHEMATIC

A wonderful diy gsm jammer or cellular mobile phone jammer schematic diagram for use only in GSM1900 with frequency from 1930 MHz to 1990 MHz. The GSM1900 cellular cell phone network is made use of...

Biosensor circuit

This week was spent completing a number of different objectives. Firstly, the software was downloaded to design the schematic for the circuit to be translated onto a PCB. Much of the week was spent...

Instrumentation circuit

The mechanical chassis prototype, as can be seen from the image on the left, was made using two materials: foam and aluminium. Foam was chosen due to its easy manipulation and aluminium due to its...

Hum Circuit

Although our kit utilizes an off-the-shelf microcontroller (AtMega328P-PU based Arduino), we additionally designed a simplified version. This allows other collaborators and students to potentially...

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

HAM Modulation Monitor

Modulation Monitor is a simple and useful circuit for hams. You can listen to on air transmission...

Auto ON-OFF lights

An ordinary automatic room power control circuit has only one light sensor. So when a person...

Manage the application of the chip in high-performance linear lithium battery charge

CN3052A/CN3052B/CN3056 the high-performance linear lithium battery charge manages the chip....

Charging a low-voltage high-C capacitor. Efficiently

The first option is of course a zener. I actually have a bunch of 2. 2V which would protect the...

Add a thermometer to your digital multimeter

A digitalmultimeter is a very useful instrument that combines several measurement functions in...

Water Level Detector With Alarm

This is a simple alarm circuit which produces a musical tone when water or some conducting liquid...

Tube-based Buffer amplifier

The solid-state, unity-gain power buffer is easy to imagine, as many already exist. But what...

Audio Output Level Indicator

This unit is designed for monitoring the audio output level across a loudspeaker when carrying...