Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
DIY HV Variable Cap
DIY PMA alternator
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
5800 Xpressmusic LCD Screen Display Problem Repair Procedure
This mobile phone repair tutorial, only applicable if after replacing a good LCD replacement or rest assured that the LCD screen is working fine but the display problem still exists. If the LCD connector is seemingly okay and the quickest method is to replace the EMI Filter IC which has a product code value of EMIF07-LCD02F3. In this IC where the
Digital thermometer with LED / LCD display
Now we bring you two versions of a homemade digital thermometer with ICL7106 that I recently built. One version uses a LED display, the second version LCD display. In both versions, is used silicon transistor as a temperature sensor. The temperature is determined by the voltage drop, temperature dependence is approximately -2. 2 mV / °C. Power can
High-speed control scheme LED display screen circuit diagram and principle
This is a high-speed control scheme LED display screen circuit theory. Adopt the MCS51 series one-chip computer to control LED display screen; The random access memory 62512 is used as the data storage of LED display screen, store the matrix data waiting to reveal the content; Adopt 8 lines of scanning modes, the dot matrix of lamellar LED is a
Large-scale LED display system hardware structure and principle
The large-scale LED display system adopts the line by line scan and lists the driving means to save the expenses of hardware, it adopt 1/16 it is non-interlaced scanning mode, LED display screens large-scales whole it last 16 pieces all right. The picture, in order to reveal the schematic diagram of the driver module. Each display module is that a
LED display screen hardware cipher scheme on the basis of the one-chip computer
LCD Display with Microcontroller
Here I have described how to connect a 16 by 2 LCD display to a microcontroller. Here I have demostrated it with very common pic 16F877A. This is the circuit diagram. Here I haven`t showed the power supply and oscillator connection for pic and LCD. LCD normally have 16 pins. If you carefully observed you can see number 1 or 16 have printed near th
water level indicator using 7 segment display
Using this schematic electronic project can be designed a very simple water level indicator electronic circuit that uses a 7-segment display to indicate the water level (low, half and full)in the tank. This water level indicator electronic circuit shows the water level by displaying L, H and F for low, half and full, respectively. This water level
Led display digital Voltmeter
How to display text on 16x2 LCD using AVR microcontroller (ATmega16)
This article is in continuation to the articleSingle character LCD display using AVR. The aforesaid article shows how to display a single letter onLCD. Moving forward towards learning to work with LCD, this article explains how to display a string on LCD. Displaying string is occasionally used in many applications. The connection of the LCD with t
Digital DC Motor Speed Control With LED Display
Various techniques can be used to control the speed of a dc motor, such as using the phase-locked-loop principles, digital inputs, or analog inputs. If desired, the speed of the motor may also be monitored with LED or LCD displays. The project digital DC motor speed controller illustrates the use of digital inputs to control the speed of a dc...
Digitally controlled FM transmitter with 2 line LCD display
Each step will result in a self functional unit. In the end of this journey, you will be able to link the steps together into a very powerful FM transmitter. This part will explain the main controlling unit for the FM transmitter. This part is very important since the transmitter frequency is digitally controlled and thereby very stable. The PIC16
led display digital voltmeter
This is an easy to build, but nevertheless very accurate and useful digital voltmeter. It has been designed as a panel meter and can be used in DC power supplies or anywhere else it is necessary to have an accurate indication of the voltage present. The circuit employs the ADC (Analogue to Digital Converter) I. C. CL7107 made by INTERSIL. This IC i
7 segment Display
Multiplexed 7-Segment Display PCB The display PCB consists of four MAN72 7-segment common-anode ..
Full display circuit
7 segment led displays package dimensions and logic diagram
Led display digital Voltmeter
It has been designed as a panel meter and can be used in DC power supplies or anywhere else it is necessary to have an accurate indication of the voltage present. The circuit employs the ADC (Analogue to Digital Converter) I. C. CL7107 made by INTERSIL. This IC i
display and serial interfacing of
This hardware is used to display the number of cars in the parking lot. Basically, this board has six-segment display but using only one display can do our work. It used segment driver IC SN7447AN and 3*8 decoder to select the corresponding display. This unit is to display the number of cars in parking lot on the computer. The computer may be plac
seven segment display used in automatic
At89s51 microcontroller will be the main component controlling the process, and display different digits on display. The seven segment display is found in many electronic devices. It is just 7 LEDs that have been combined into one case to make a convenient device for the displaying numbers and some letters. In common anode version, the positive...
wifi radio with lcd display
This is the seventh part of an ongoing series about building a low cost, open source streaming internet radio. If you haven`t already, check out the previous parts (see the links at the end of this article) for some background about the project. In part six, we used OpenWrt`s UNIX-style shell commands to interface with mpd, the music player daemo
implement free running counter in pic16f84a using seven segment display
This post provides the implementation of free running counter ( using c language ) for PIC16F84A micro-controller. This code is written in such a way that,..
my gps lcd display project using pic16f84
This is a project that I started back late 2003 when I just starting to learn PIC programming. I wanted to building something that actually did somthing us..
pic16f877 based controllable digital clock using lcd display codeproteus simulation
This PIC16F877 microcontroller tutorial answers the question, "" How to implement a controllable digital clock using PIC16F877 ? "" Using PIC16 simulator (Pr..
pic16f877 based digital clock using lcd display codeproteus simulation
This PIC16F877 microcontroller tutorial answers the question, "" How to implement a digital clock using PIC16F877 ? "" Using PIC16 simulator (Proteus) you ca..
8x8 dotmatrix scrolling led display
Here`s an another project, which makes an Scrolling LED display. Here 64 leds which are connected to an Matrix display. The Anodes are drived through an Driver IC UDN2981 and the cathodes are drived through ULN2803. The Atmega8515 is used in this project to control the display. The microcontroller is programmed with Bascom AVR. For example, look
Alarm circuit for water level display
7 segment rolling display using pc
It is actual absorbing and acceptable to be able to ascendancy aggregate while sitting at your PC terminal. Here, a simple accouterments ambit and software is acclimated to interface a 7-segment based rolling display. The printer anchorage of a PC provides a set of credibility with some acting as ascribe curve and some others as achievement...
Seven segment display circuit with the 4511 decoder and the 4029 counter
interfacing multi 7 segment display
led display circuit diagram
This page features a replacement circuit for the LM3909 LED Flasher / Oscillator using discrete components. The circuit is functionally the same as the integrated LM3909 but has a minor variations in values of the components used. The LM3909 can still found but is fairly expensive, one possible source is Futurlec. The LM3909 is also available...
electronic timer with display circuit
The circuit is built using ICM7217 integrated circuit, manufactured by Intersil, which contains a CMOS counter up / down, with 4 digits and display properly. IC3 is the clock generator circuit which provides a square wave with period 1 s clock signal is available on pin 3 (Q13). It can be divided by 60 in IC4, if necessary, measurement of longer t
Running message display circuit
moving message display
You can make an LCD show a brief moving message by interfacing it to a microcontroller. Here`s an AVR-based moving-message display that uses a 16G—2 LCD display incorporating HD44780. The 16G—2 LCD can display 16 characters per line and there are two such lines. Fig. 1 shows the circuit for AVR ATmega16-based moving-message display on an LCD.
Digital to Analog Circuits
Analog to Digital Circuits
Data Logging Circuits
Data Bus Circuits
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 measured. There are three main categories of distance measurement methods in use: a) By...
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 find something potentially valuable, hidden a few centimeters below the soil. So many...
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 circuit comes as a solution to this problem. Depending on humidity of the pot at...
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 circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
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, such as filtering or distortion. Instead, a frequency division system produces outputs...
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 calibration of the rope. This arrangement still exists in some yachts. The big...
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 supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
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. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity