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
Light Laser LED Circuits
Display Text on an HD44780 LCD with an Arduino
To do this, first, we must make the appropriate physical connections from the arduino board to the LCD. Then after, we must write the code so that whatever text we want displayed comes up on the LCD. LCDs are pretty much the standard now in order to display text to users of a device. Almost all electronic devices which give a readout to users of s
Adjust the Contrast of a HD44780 LCD
With the 10KG potentiometer, you can vary the contrast from dark to bright. When the potentiometer is near 0G , the screen will be very dark. As you turn the potentiometer up to 10KG , the screen will become brighter.
Contrast Control for LCDs
The adjustment control for the contrast of an LC-Display is typically a 10-k potentiometer. This works fine, provided that the power supply voltage is constant. If this is not the case (for example, with a battery power supply) then the potentiometer has to be repeatedly adjusted. Very awkward, in other words. The circuit described here offers a s
MikroC Pro for PIC driver routine for 74HC595 based serial LCD interface
Library routines for 3-wire LCD interface based on 74HC595 shift register. More details are provided in the attached ReadMe document or posted at Do you want to unsubscribe in order to stop receiving notifications regarding "MikroC Pro for PIC driver routine for 74HC595 based serial LCD interface " changes.
lf286 Linux USB LCD display with watchdog and buttons
This article is the result of the very positive feedback on the hardware articles that I have written so far. You LinuxFocus readers are really a great audience! Some of you wanted to know how to interface the USB bus. So here is a nice solution. We use the LCD display from the May 2002 article and make it work with the USB bus. The whole thing wi
lf253 Frequency counter 1Hz-100Mhz with LCD display and RS232 interface
This article continues the AT90S4433 Microcontroller series. I suggest you to read the previous articles on Atmel Microcontroller programming with regards to: This time we design a frequency counter which can measure frequencies from 1Hz to 100MHz. Alternatively you can use it also to just count events, such as how many people crossed the street (
Alcatel lcd circuit
microcontroller circuit schematics
The following are detailed schematics for the QScreen Controller. The QScreen Controller combines an embedded computer based on the 68HC11 microcontroller with a touch panel and LCD (liquid crystal display) graphic user interface ( GUI ) that is ideal for instrument control and automation. If you have any questions about the QScreen`s electrical o
Keypad and LCD Display Module for Data Entry
Control your instrument with a 4x20 LCD display and 4x5 keypad designed for front panel feedback and control..
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
dvi to par digital video interface with lcd
Unfortunatately this only provides 1. 8v signals and still needs a converter to interface to the 3. 3v signals most raw LCD use. The main components is the TFP101A. I got mine as a free sample from TI. Also visible in this picture is the fact that only the upper 6 of the 8 color bits available on the dvi2par are being used. It`s important to...
Clip sync output to TTL level seems to take some more time to fit the extra parts on the board; as a quick fix, put a ZPD4. 7 (4. 7 V Z-Diode) between SGand ground at the POWERswitch (ring to SG) and a 1k resistor between the SGoutput from the BOTPCBand the SGpad of the power switch to clip SYNCOUTto 4. 7V : This controller is based mainly on the c
Build your own LC-Display
For the wiring of the display we first of all take the ribbon cable and solder it according to the following circuit diagram on the 25 pin sub-d (parallel port) plug, whereby in my small circuit diagram I described the rear side - consequently the solder side of the plug:
lcd interfacing with cy8c3866 psoc 3
The PSoc 3 Primer kit is specifically designed to help students to master the required skills in the area of embedded systems. The kit is designed in such way that all the possible features of the microcontroller will be easily used by the students. The kit supports FX2LP Programmer which is done through USB port. Cypress CY8C3866 core (CY8C3866),
8bit lcd interfacing with lpc2148 arm7 tyro
glcd interfacing with avr slicker
lcd Interfacing with lpc2148 arm7 primer
lcd interfacing with avr primer
lcd interfacing with dspic primer
lcd interfacing with pic16f877a slicker
implementation of glcd with lpc2148
interfacing 2x16 lcd with spartan 6 fpga
The Spartan-6 board has 2x16 LCD, indicated as in Figure. The 2x16 character LCD interface card with supports both modes 4-bit and 8-bit interface, and also facility to adjust contrast through trim pot. In 8-bit interface 11 lines needed to create 8-bit interface; 8 data bits (D0 D7), three control lines, address bit (RS), read/write bit (R/W)
interfacing lcd with arm7 friendly
led driving techniques reduce power in lcd tvs
HD44780 Character LCD Displays Tutorial
Interfacing with a HD44780 compatible display using some DIP switches and a few other components. The module that we are using is a 16 character x 2 line display that we stock over here. It uses an ST7065C controller, which is HD44780 compatible. The figure below shows the LCD module and pinout. The circuit diagram below shows the LCD module...
16x2 LCD Display Custom Characters Circuit
The schematic for this tutorial can be seen drawn out below. It includes everything you`d need to wire up for the tutorial to work. PIC programming circuitry is not included in the schematic as I`m assuming either you`re programming the PIC out of circuit or can add the few elements into the circuit on your own for in-circuit programming. The 16x
FPGA / CPLD 16x2 LCD Interface Circuit
The schematic for this project is a modified version of the CPLD dev board schematic. There are a few new parts added for this project and you can see the completed schematic for this project below. The main parts in the schematic are the CPLD Dev Board, 16x2 LCD (HD44780) and ByteBlasterMV. The 16x2 LCD makes 11 digital I/O connections to the
PIC Frequency Counter with Frequency Lock
This PIC software combines frequency counter and frequency lock functions. By adding couple of transistors and operation amplifier TL082, it is possible to lock the LC oscillator frequency. Frequency reference is formed from the measured frequency itself after the delay defined by parameter 0Dh, when the number of the consecutive samples (defined
2.5GHz Frequency Counter
Serial LCD Library
This project can be used with a standard Hitachi HD44780 (or compatible) controller chip to control it through only 2 wires. There is a variety of shapes and sizes available. Line lengths of 8, 16, 20, 24, 32 and 40 characters are all standard, in one, two or four-line versions. The problem was that these LCDs required at least 4 data wires and 2
Low noise digital data driver circuit integrated poly-Si TFT-LCD
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...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity