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Showing posts with label digital. Show all posts

Thursday, November 20, 2014

Digital control system applications

Digital Control System is a branch of the control system with continuous time processes in the region associated with the digital controller as the controller of the control elements that control systems and computing discrete time. Depending on requirements, a digital controller can be shaped microcontroller and ASIC to a standard desktop computer. Because the digital computer system is discrete, then the Laplace transform is used in the control system is replaced with the Z-transform. Therefore, you must understand about the concept of continuous time and discrete time concept.

Flow Chart - Digital Control system applications

Digital computer also has a limited precision (See quantization) extra care needed to ensure that errors in the coefficients, A / D conversion, D / A conversion, etc. do not produce unwanted effects or planned.

The application of digital control can easily be done when used in a feedback form. Since the creation of the first digital computer in the early 1940s the price of digital computers has dropped significantly. The reason this is one of the many reasons for the application of digital control systems for the control of the control system. Other reasons:

Flexibile: easy to configure and reconfigure through software

* Scalable: can be set up programs tailored to the limits of memory or storage space at no extra cost

* Adaptable: program parameters can be changed with the times

* Static operation: digital computers are much more susceptible to environmental conditions rather than of capacitors and inductors

Wednesday, November 19, 2014

7 Segment Display Digital Dice with IC 4026

7 Segment Display + Digital Dice with IC 4026 -

Composite Materials:

1. IC 555
2. IC 4026
3. 10k ohm resistor (1buah), 100Kohm (1 piece) or replaced with a potentiometer 100k ohms, 220 ohms (7 pieces if necessary)
4. 10 uF capacitor (1 piece)
5. Button press / push button
6. 4.5V battery
7. Jumper cables sufficiently

7 Segment Display + Digital Dice with IC 4026 Image

Assemble steps to Breadboard:

After stringing understand 555 experimental trials this time it will be easy just follow the schematic drawing shown earlier, and results in the breadboard like this:
Pushbutton has 4 feet where there are 2 pieces that connect pairs of legs.
If the battery voltage exceeds 6V, then 7 before going to the 220 ohm resistor required segment or more. If using 4.5 V resistor can not be used.
Play-turn potentiometer to obtain the desired rate of addition of digits.
If speed digit changes very quickly, then the circuit can be used as "ELECTRONIC DICE". So when the button is pressed it will stop the numbers digit number we do not expect before.

There is info of 7 Segment Display + Digital Dice with IC 4026

Wednesday, October 22, 2014

Doubler Digital Frequency circuit

Doubler Digital Frequency circuit includes a simple and easy to understand. Digital Frequency Doubler circuit application contained in the system electronics such as audio-producing organ, or keyboard. The function of this series Digital Frequency Doubler for multiplying two input frequencies.

The process of multiplying 2 on scales in an organ in principle is like this series Digital Frequency Doubler. Example of rising to a ringing tone DO RE then electronically technique in it is by multiplying the two frequency bands such as this series Digital Frequency Doubler.

Digital Frequency Doubler.

Thursday, October 16, 2014

Build a Digital Stopwatch 0 60sec

Now Build a Digital Stopwatch 0-60sec By using the same circuit of the Digital Stopwatch 0-99sec , we can add an AND gate, and transform the 0 – 99sec stopwatch to a 0 – 60sec stopwatch.We must find a way to control the RESET function of the BCD counter, which is responsible for the counting of the seconds. As we studied above, the circuit resets when we have 99 to 100, that is 1001 1001 à 0001 0000 0000. To make a transformation successfully we must force the pulse from 59 to 60 0011 1001 à 0100 0000 on the output of the BCD counter.

By placing the AND gate, with its inputs on the Q1 and Q2 of the BCD counter of the decades, we make sure that when the gate closes, the RST input of the BCD counter will be set to logical “1”, which on its turn, will force the circuit to start over. The transformed circuit appears in picture 2.

Tuesday, September 2, 2014

Digital Thermometer with data processing of a microcontroller AT89C4051

Digital Thermometer 0-100.0°C is a digital thermometer that operates in modetemperature measurement in Celsius (° C). Digital Thermometer 0-100.0 ° C in this article uses data processor in the form of a microcontroller AT89C4051.

Temperature sensors used in Digital Thermometer 0-100.0 ° C. This temperature sensor LM35D. Digital Thermometer 0-100.0 ° C. It uses the temperature measurement data viewer in the form of 1 line LCD viewer. Digital Thermometer 0-100.0 ° C. It can display the temperature measurement data with a resolution of 0.1 ° C.

Digital Thermometer Circuit Diagram

Digital Thermometer 0-100.0 ° C. These temperature sensors make use of LM35D as temperature sensing. In Digital Thermometer 0-100.0 ° C. This temperature sensor measurement data this LM35D (Level Voltage) is then converted into 4-bit binary data using the ADC CA3162.

Then the 4-bit data from ADC CA3162 which is a measurement of data if the temperature is in the AT89C4951 microcontroller so that it becomes an operating principle of temperature measurement based on digital thermometers. In the final stage of the Digital Thermometer 0-100.0 ° C. This is the appearance of digital data temperature measurement, using digital data viewer of the LCD 1 line.

Saturday, August 23, 2014

Digital Electronic Dice Wiring diagram Schematic

Simple and digital electronic dice game schema diagram, this is a simple schema. Powered Board Games is a new category of board games they are digital and can be played using a tangible electronic dice. In this schema Six LEDs are arranged to produce a display the same as the dots on a dice. When PBI is depressed, the display is blanked and the oscillator (ICl a, b, c) clocks IC2 at about 1MHz. IC2 counts from zero and resets on seven When PBI is released, the display is enabled and a decoding system (IC3) produces the correct output on the LEDs.

Digital Electronic Dice Circuit Diagram

Monday, August 11, 2014

Digital Audio Memo Alert Wiring diagram Schematic

This is a Digital Audio Memo Alert Circuit Diagram. This device prevents paper notes and memos from being overlooked. A paper note placed between two fingers made of a conducting material (metal or conductive plastic) breaks the schema, allowing pair 1 of Ul-a to go high. This causes Ul-c Ul-d to act as an oscillator, pulsing piezo buzzer BZ1.

Digital Audio Memo Alert Circuit Diagram

Digital Programmable Exactness Amplifier Wiring diagram Schematic

This is a Digital Programmable Exactness Amplifier Circuit Diagram. In this schema the DG419looks into the high input impedance of the op amp, so the effects of Rvs(o`l are negligible. The DG441 is also connected in series with RIN and is not included in the feedback dividers, thus contributing negligible.

Read: Full Rail Excursions Line driver Circuit Diagram

Digital Programmable Exactness Amplifier Circuit Diagram

Because the DG419 and DG441 can handle Â±15 V, the unity gain follower connection, Xl, is capable of the full op-amp output range of Â± 12 V. Read: Low Distortion Amplifier cum Compressor Circuit Diagram

Friday, August 8, 2014

Digital code lock

This is a simple but effective code lock schema that has an automatic reset facility. The schema is made around the dual flip-flop IC CD4013.Two CD 4013 ICs are used here. Push button switches are used for entering the code number. One side of all the push button switches are connected to +12V DC. The remaining end of push buttons 2,3,6,8 is connected to clock input pins of the filp-flops. The remaining end of other push button switches are shorted and connected to the set pin of the filp-flops.

The relay coil will be activated only if the code is entered in correct sequence and if there is any variation, the lock will be resetted. Here is correct code is 2368.When you press 2 the first flip flop(IC1a) will be triggered and the value at the data in (pin9) will be transferred to the Q output (pin13).Since pin 9 is grounded the value is “0” and so the pin 13 becomes low. For the subsequent pressing of the remaining code digits in the correct sequence the “0” will reach the Q output (pin1) of the last flip flop (IC2b).This makes the transistor ON and the relay is energised.The automatic reset facility is achieved by the resistor R11 and capacitor C2.The positive end of capacitor C2 is connected to the set pin of the filp-flops.When the transistor is switched ON, the capacitor C2 begins to charge and when the voltage across it becomes sufficient the flip-flops are resetted. This makes the lock open for a fixed amount of time and then it locks automatically. The time delay can be adjusted by varying the values of R11 and C2

Notes.

* Assemble the schema on a good quality PCB.
* The schema can be powered from 12V DC.
* Mount the ICs on holders.
* The L1 can be a 12V, 200 Ohm SPDT relay.
* Capacitor C1 should be tantalum type.
* The C1 and C2 must be rated at least 25V.