Vacuum Tubes Valves
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AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
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Data Bus Circuits
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RF Converter Circuits
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voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
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555 Timer Circuits
Remote Control Toy
H Bridge Circuit
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
Light Laser LED Circuits
Liquid-Crystal Display (LCD) Tester
A segment may be tested by applying an alternating voltage of a few volts across it. Note that the application of a direct voltage will damage the display irreversibly: the resulting current will remove the tracks. The alternating voltage should contain not even a tiny direct voltage component. An alternating current also removes part of the...
LCD displays easy to use and easy to build
Here is an example which implements a clock in just 36 lines of perl code. It displays time and date and the upper right corner shows a little icon called "heartbeat". The "heartbeat" is added by the LCDd server. This "heartbeat" icon blinks once in a while to indicate that the display is still alive. In lcdproc you can have more than just...
PIC18F2550 KS0108 Graphical LCD Oscilloscope
Small-scale LCD LED in a poor light drives the circuit design consideration
16X2 LCD programming
avr 4 bit lcd interfacing tutorial
interafce 16x2 lcd with avr
LCD comes in various configurations and the most popular one is 16x2 matrix display. This article shows the interfacing of ATmega16 with LCD by displaying a simple character on the LCD. In this project LCD is working in 8-bit mode i. e. , the data transferred to the LCD must be in 8-bit data form. The PortA of ATmega16 is connected to data pins...
circuit diagram of lcd tv video system
interface 16x2 lcd with 8051 microcontroller at89c51
INTRODUCTION It is very important to keep a track of the working of almost all the automated and semi-automated devices, be it a washing machine, an autonomous..
lm1881 video sync for tv and lcd monitor separator
The chips include an ATmega88 as the main controller, an AD9280 ADC, an LM6134 high-speed quad op-amp, an LM1881 video sync separator, a 74HC4066 as a simple analog switch, and an RS-232-level converter. LM1881 Video sync separator extracts timing information including composite and vertical sync, burst/back porch timing, and odd/even field inform
Interfacing LCD via SPI
As time goes by, microcontrollers become more powerful, cheaper, and smaller. A typical micro of the past could have had 40 pins and no internal memory. On the contrary, modern J-series PICs are made with 96K program memory and 28 pins. We can drive a lot of peripherals with that amount of memory, however we are getting short on pins. In this arti
LCD Interfacing with AVR-Atmega8 and Atmega32
Interfacing LCD Display to Avr micro controllers-Atmega8 and Atmega32 with circuit diagram and code/program using embedded C to download..
direct driving LCD
The LCD in question appears to have more pins than the microcontroller, I could not expand the image to get a better look. Unless you are adamant about using this display, I recommend obtaining a hitachi compliant alphanumeric display (onboard driver), this will require fewer I/O pins and less uC code.
interfacing lcd atmega32 microcontroller atmel studio
LCD (Liquid Crystal Display) is an electronic display which is commonly usednowadaysin applications such as calculators, laptops, tablets, mobile phones etc. 16G—2 character LCD module is a very basic module which is commonly used by electronic hobbyists and is used in many electronic devices and project. It can display 2 lines of 16 character...
interfacing lcd with 8051 using keil c at89c51
16G—2 character lcd display is very basic module which is commonly used in electronics devices and projects. It can display 2 lines of 16 characters. Each character is displayed using 5G—7 or 5G—10 pixel matrix. Interfacing 16G—2 LCD with 8051 using Keil C is bit complex because there is no powerful libraries in Keil C. To solve this problem we...
Lilliput auto video switching for reversing camera
I have been reading a lot of posts about the Lilliput not being able to `auto switch` even though it is in the secret menu, so I decided to make a..
LCD Backlight Electro luminescent Inverter
There are two major types of backlights for LCDs: LEDs, which stands for light emitting diode, or EL, which stands for electroluminescent. EL backlights tend to be more efficient and have more uniform lighting than LED ones, but they require some tricky circuitry to drive. If you`ve heard of Organic LED displays, or OLEDs, that`s basically an arra
4 Direct drive LCD display circuit diagram
Each part of LCD has individual counter, latch, decoder and driver. Pumping signal feeds back to the motherboard of LCD. When the display section is disconnected, the phase and amplitude of the motherboard and display segment drive signal are the same. It shows no voltage on the 2 ends of display. When the display segment is triggered, its...
Automatic Control for LCD Panel Backlight
This is an Automatic LCD Panel Backlight Control circuit. This is a simple low cost implementation of an LED controller. It can compensate for aging effects..
Step Up PSU for LCD
To start old Optrex DMC50264N LCD module you need to get +24V LCD bias voltage Where to get it if you have only low voltage 3 5V As LCD module drains very low current, it is possible to build very small DC/DC converter. There are lots of chips designed for this. I used MC34063, as I already had few of them in some old trash boards. The schem
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
Data collecting system of LCD human-computer interaction
This text regards MSC1210 as the cores of measuring, SIGPROC signal processing and communication, has designed the module of acquisition system of high-accuracy temperature. It is easy to expand that this system measures the passway, survey accuracy is high, can carry on the measurement of the high accuracy data fast. The hardware part of this sys
alphanumeric lcd as counter
The communication technique with the LCD is the same like the last lesson, and for the current experiment we have added a counter which counts between 0000 and 9999. Our counter increments with 1 second delay. /* ` * ` Lesson nr. 16: ` Alphanumeric LCD as counter mode. ` Done by: ` Aureliu Raducu Macovei, 2010. ` ` In this exper
LCD2LPT with LIRC
AKAI LTA-27A901 LCD TV
lcd 2 usb Using a C language
pic16f84a lcd interfacing code in 8bit mode proteus simulation
This post provides the LCD interfacing code using PIC16F84A microcontroller. This code is written in C language using MPLAB with HI-TECH C compiler. You ca..
connect a lcd to the bottom half of a port
The circuit diagram and code on how to connect an 16x2 LCD to a PICAXE-18M2 microcontroller using the lower half of a port for the data lines..
how lcd display interface circuit works 20
An LCD -liquid crystal display is an electronically-modulated optical device made up of any number of pixels filled with liquid crystals and arrayed in front of a light source (backlight) or reflector to produce images in color or monochrome. The block diagram shows the LCD gets a data source from the application processor, so therefore LCD is bei
lcd tv power supply circuit diagram
Serial Interface LCD circuit
The circuit simply consists of a PIC micro, ICSP interface, an RS232 level translator and an HD44780 LCD. Initially a scrolling message is displayed using show_intro. When a serial input is detected the main program starts. All keys are now either text entry or commands. An infinite loop keeps checking for key input. If the key is a hash...
Light Sensing Circuits
Light Dimmer 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...
Digital Signal Integrity
Interconnection and Timing of Digital Circuits
CMOS Circuits Tutorial