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Display Electronic Circuits or Electronic Schematics
Display Circuits:  #'s - C       D - I       J - N       O - T       U - Z

Last Updated:  06/02/2021 01:44:39 PM

Circuits Designed by Dave Johnson, P.E.

10 Turn Pot Forms Frequency ReadoutLets say you are designing a signal generator for a test fixture.  To adjust the frequency you would like to use a ten turn pot with a nice dial mechanism attached as a frequency display.  However, a display range of 0 to 9.99 would be impractical since . . . Hobby Circuit designed by David A. Johnson P.E.-January, 2008

125Khz Ultra Pure Sine Wave Signal SourceFor some RFID systems operating at 125KHz, a very low distortion signal source reference is needed.  The circuit shown on this page produces a 10-volt peak-to-peak signal into a 50-ohm load, with a distortion of only 0.01% . . . Hobby Circuit designed by David A. Johnson P.E.-February, 2002

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+24V and-16V LCD Bias -  Positive    (24V AT 24mA) and negative    (-16V AT 24mA) bias voltages for TFT LCD displays can be generated from a 3V to 6V input supply by the LT3487__ Linear Technology/Analog Devices App Note, Mar 24th 2010

P Displays 10 Bit Data on Three LEDs -  11/07/96 EDN-Design Ideas circuit in Figure 1 uses a PIC16C55 P to read 10-bit binary data and directly display  data in decimal format on three common-cathode LED displays.  If value of  data exceeds 999,  displays show three hyphens   (---) to represent overflow.  PIC16C55 has high drive Design by Yongping Xia, Philips Lighting Electronics, Torrance, CA

1 Hz-2.5 GHz with Blue 2x16 LCD display -  This is a top quality project designed to obtain maximum performance.  The hardware and software has been pushed to reach the frontier of technology.  The transcendent is not only a frequency counter, it is a corner stone in your successfully constructions.  

1 IC Biases LCD & GaAsFET Amplifier -  04/09/98 EDN-Design Ideas -    (File , contains several circuits, scroll to this one) Operating from a lithium-ion cell or a four-cell NiCd battery, the circuit in Figure 1provIdeas 6V bias for LCDs and a separate, quiet negative bias for a GaAsFET power ampli Design by John Wettroth, Maxim Integrated Products, Apex, NC

1 wire brings power & data to LCD Module -  01/27/14EDN-Design Ideas If you need to connect a small remote LCD display, or your C has run out of I/O pins, heres a good, cheap solutionEmbedded systems frequently use HD44780type LCD displays as it is considered the most popular alphanumeric display controller.  The interface comprises at least 14 pins: eight for data, three for control    (EN, WR, RS) , two for power supply    (Vdd, Vss) , and one for contrast    (Vre) .  Configured in 8bit mode, it requires at least 10 I/O lines    (D0D7, EN, RS) .  Configured in 4bit mode, it requires at least six I/O lines    (D4D7, EN, RS)  Design by Benabadji Noureddine

1.5V battery powers white-LED driver -  30-Sep-04 EDN-Design Ideas Although white LEDs are common in a variety of lighting applications, their 3 to 4V forward-voltage drop makes low-voltage applications challenging.  Charge pumps and other ICs are available for driving white LEDs, but they generally don't work with the low supply voltage of 1.5V in single-cell-battery applications Design by Design Idea bySteve Caldwell, Maxim Integrated Products, Chandler, AZ

10 Turn Pot Forms Frequency Readout -  Lets say you are designing a signal generator for a test fixture.  To adjust the frequency you would like to use a ten turn pot with a nice dial mechanism attached as a frequency display.  However, a display range of 0 to 9.99 would be impractical since . . . Hobby Circuit designed by David A. Johnson P.E.-January, 2008

12 Volt DC Fluorescent Lamp Driver -  This fluorescent lamp driver uses a normal 120 to 6V step-down transformer in reverse to step12V to about350-Volt to drive a lamp without need to warm filaments.   __ Designed by Aaron Cake

12 Volt Knight Rider LED display -  12 Volt Knight Rider, "Look-A-Like", Lighting Systems Revised "JAN.2, 2008"  (Errors on Knight-3, Corrected)  __ Designed by G.L. Chemelec

125Khz Ultra Pure Sine Wave Signal Source -  For some RFID systems operating at 125KHz, a very low distortion signal source reference is needed.  The circuit shown on this page produces a 10-volt peak-to-peak signal into a 50-ohm load, with a distortion of only 0.01% . . . Hobby Circuit designed by David A. Johnson P.E.-February, 2002

15x7 Display -  This project is what you have been waiting for.  Remember the scrolling signs you see in shops and on advertising billboards? Now you can program your own moving sign with all the effects you can think of.  We have provided a blank canvas in the form of a scanning screen 15 LEDs by 7 LEDs andon this you can put anything you like.  Of course this is not a two-day job.  You have to learn how to program  __ Contact: Collin Mitchell

16x16 LED Matrix & Driver -  In the early '80s, I read some articles on LED arrays.  They described using arrays of 64 or more LEDs as crude oscilloscopes and other interesting things.  I decided I'd make one myselfa really big array, 256 LEDs arranged as 16 columns by 16 rows.  In 1983, while I was in my final semester of electronics classes at Monterey Peninsula College, I designed my array.  I wanted a high-density array, in part to make the PC board smaller, but mainly to give a better appearance.  So, I used the smallest LEDs I could find, 2mm x 2.5mm.  I was lucky and found that All Electronics was selling them in 200-packs for something like $20.  I bought two packsa fair sum for me at the time __ Designed by John DuBois

1-wire controls LCD Module -  EDN-Design Ideas 03/20/2017    This one-wire LCD interface DI generates all the signals required to control the ubiquitous character display Design by Rex Niven

2:1 RGB Multiplexer & Cable Driver -  The LT1675 is also an integrated 3-channel 2:1 multiplexer that includes gain of two for cable-driving applications.  The basic configuration is shown in Figure 34.  A single channel version for composite video applications is available as an LT1675-1.  __ Linear Technology/Analog Devices App Note, Mar 25th 2010

28 LED Clock -  This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes.12 LEDs can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5 minute intervals within the hour.4 additional LEDs are used to indicate 1 to 4 minutes of time within each 5 minute interval.   __ Designed by Bill Bowden

2-Wire LCD Interface using PIC16cf84 -  Alphanumeric LCD displays have become very popular for microcontroller applications because y can add a lot to a project in a variety of different ways.  A text message givinguser instructions as well as feedback can make application seem much more "professional" and easy to use.  I like to use LCD's to help debug applications, with breakpoints set to display variable and I/O conditions and y are a lot cheaper than using a microcontroller emulator.  To top it off, surplus LCD's can be found for a dollar or less __ Designed by Reynold's Elec

3.3V Baseband Video Splitter/Cable Driver (DC Coupled) -  A simple video splitter application using an LT6206.  Both amplifiers are driven by the input signal and each is configured for a gain of two, one for driving each output cable.  Here again careful input biasing is required    (or a negative supply as suggested previously) .  __ Linear Technology/Analog Devices App Note, Mar 25th 2010

3.3V Single Supply LT6551 RGB Plus SYNC Cable Driver (DC Coupled) -  The LT6551 drives four cables and operating from a single 3.3 V supply.  The inputs need to have signals centered at 0.83V for best linearity.  This application would be typical of standard-definition studio-environment signal distribution equipment    (RGBS format) .  __ Linear Technology/Analog Devices App Note, Mar 25th 2010

4 Channel Timer using Atmel 89C4051 & MAX7219 Display Driver -  Easy build 4-channel timer, suitable for energy saving, simple hardware and nice firmware with c coding.  Automatic power down mode, simple settings, optional buzzer for sound alarm. __ Designed by Wichit Sirichote

4:1 RGB Multiplexer -  Since the LT6555 includes an enable control line, it is possible to extend the selection range of the multiplexer.  This circuit shows two LT6555 devices in a configuration that provides 4:1 selection of RGB sources to an RGB output port    (these could also be YPBPR signals as well, depending on the source) .  To avoid frequency__ Linear Technology/Analog Devices App Note, Mar 25th 2010

400MHz, 5V Single Supply Video Driver (AC Coupled) -  The LT6557 400MHz triple video driver is specifically designed to operate in 5V single supply AC-coupled applications as shown.  The input biasing circuitry is contained on-chip for minimal external component count.  A single resistor programs the biasing level of all three channels.  __ Linear Technology/Analog Devices App Note, Mar 25th 2010

5 Output Regulator for TFT-LCD Panels: 5V AT 0.5A, 22V AT 20mA,-10V AT 20mA, 3.3V AT 0.5A, 8V AT 80mA -  The LT3513 5-output adjustable switching regulator provides power for large TFT-LCD panels, providing Vlogic, Avdd, Von and Voff__ Linear Technology/Analog Devices App Note, Mar 24th 2010

5301 Wideband Fuel Mixture Display -  This is the construction guide for the 5301 wideband fuel mixture display kit.  The 5301 is the Tech Edge version    (rather than the Jaycar version) of the modified Silicon Chip FMD design, and it features, compared to the original kit, double sided PCBs a new front panel design, in-built RS232 output and superbright GaAlAs 7 segment LEDs The 5301 uses the same version 1.1 software as the 5300 and, unless noted otherwise, is known elsewhere on this web site as the 5300 unit or the modified FMD display.   __ Designed by Peter Gargano 2002

5-Finger LED Counter -  Our FIVERP5 has many applications; Teach your children how to count to five! Draw attention and a smile.  Press the push button five times and trigger your hobby rocket, etc.  The unique small design will allow you to mount it almost anywhere.  Operate it with 9V battery, 12V car battery, four 1.5V batteries, or via one of our battery simulator kits.  The alternative uses are endless.   __ Contact: Kit from Elich Industrial Development, Corp

5x7 Display -  Sit back and take a big breath.  You are about to take part in one of the best microcomputer    (microprocessor) projects you have seen.  It uses a PIC16F84 micro and you will be shown how to program the chip to create quite amazing effects.  It's a simple project and you will be starting at the beginning of programming, so don't worry if you have never worked with a microprocessor before __ Designed by Collin Mitchell

7 by 10 LED Moving Sign -  This sign uses two LED arrays to form a 7 X 10 matrix.  It produces moving messages or animations stored in an EPROM.  It uses no microprocessor.   As in most electric signs, the LEDs are matrixed, and strobed very quickly.   __ Designed by Bob Blick

7 Segment LED Counter -  This simple counter can be used to count pulses, as the basis for a customer counter    (like you see at the doors of some stores) , or for anything else that may be counted.  The circuit accepts any TTL compatible logic signal, and can be expanded easily    (see Notes)  __ Designed by Aaron Cake

7 segment rolling display using PC -  It is very interesting and convenient to be able to control everything while sitting at your PC terminal.  Here, a simple hardware circuit and software is used to interface a 7-segment based rolling display.  The printer port of a PC provides a set of points with some acting as input lines and some others as output lines.  Some lines are open collector type which can be used as input lines.  The circuit given here can be used for interfacing with any type of PC?s printer port.

Read more: http://www.electronic-circuits-diagrams.com/7-segment-rolling-display-circuit/#ixzz4fil0LLEN
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75 LED Matrix using Arduino -  Presented here is a simple 7x5 LED matrix circuit vriven by Arduino Uno    (Arduino LED) .  It can be used to display your name or create any number of patterns.  If the...__ Electronics Projects for You

72 LED Clock -  In the circuit above, 60 individual LEDs are used to indicate the minutes of a clock and 12 LEDs indicate hours.  The power supply and time base circuitry is the same as described in the 28 LED clock circuit above.  The minutes section of the clock is comprised of eight 74HCT164 shift registers cascaded so that a single bit can be recirculated through the 60 stages i __ Designed by Bill Bowden

7-Segment Display -  This experiment is more of an introduction to the 4511 decoder/display driver IC than it is a lesson in how to "build up" a digital function from lower-level components.  Since 7-segment displays are very common components of digital devices, it is good to be familiar with the "driving" circuits behind them, and the 4511 is a good example of a typical driver IC    (circuit add 6/07)  __ Designed by EETech Media, LLC.

7-Segment Display Water Level Indicator -  This water-level indicator uses a 7-segment display, instead of LEDs, to indicate the water level    (low, half and full) in the tank.  Moreover, a buzzer is used to alert you of water overflowing from the tank.  The circuit shows the water level by displaying L, H and F for low, half and full, respectively.  The circuit uses five sensors to sense the different water levels in the tank.__ Learning Electronics

7-segment LCD uses two-wire interface -  09/04/03 EDN-Design Ideas You can connect seven-segment LCDs using only a two-wire interface    (Figure 1) .  The two-wire interface may be at the field-effect, direct-drive LCD or at a serial interface    (such as I2C) that uses an eight-pin microcontroller.  The design in Figure 1 uses an Atmel    (www.  atmel.  com) ATtiny12 microcontroller, IC1.  VCC can range from 2.7 to 5.5V.  Each digit receives drive from an 8-bit 74HC164 shift register, which provIdeas seven outputs for each of the segments and one output for a decimal point or a colon Design by Hans Krobath, EEC, Nesconset, NY

7V, 50mW OLED Driver from a 2V to 5.5V input -  The LTC3459 controls peak inductor current when VIN is greater than or less than VOUT.  This allows current to be controlled during start-up in a boost application or VOUT to be regulated below VIN when powered from a fresh battery.  Peak current control makes the LTC3459 an ideal candidate for charging a back-up source such__ Linear Technology/Analog Devices App Note, Mar 29th 2010

80x32 pixel DIY LED matrix display -  The LEDMATRIX additionally includes a simple speaker allowing to e.g.  notify the user of a new message being displayed.  Furthermore a TSOP1736 IR receiver can optionally be connected.  This device receives and decodes the IR signals used by ordinary TV remote controls.  By returning informtion about received IR signals to the controlling PC, the displays contents may e.g.  be remotely changed using a simple spare IR remote control. __ Designed by Till Harbaum <Till @ Harbaum.org>

8-Bit Generator & Display for Microcontroller -  For testing of microcontroller-based circuits, you need two test jigs: One for generating the desired bitstream to serve as the input to the device and the other to display the processed...__ Electronics Projects for You

8x8 Animated LED Signboard -  The firmware supplied incurrent sourcecode archive is VERY BASIC.  I do intend to draw more patterns.  However, a vast workload coupled with possible emigration has putfinished firmware on hold.  Please do go ahead and build this circuit thoughsupplied firmware is fully functional.  You can have hours of fun designing your own patterns and effects!UsesPIC16F84 __ Designed by Lewin A.R.W. Edwards

8x85 RGB POV Display. Part 1 -  Brads electronic projects This was my first attempt at a nice and colourful RGB LED POV Display.  POV stands for persistence of vision.  The circuit uses just 8 RGB LEDs which are mounted vertically and when spun horizontally it gives the illusion of __ Designed by Radio LocMan

8x85 RGB POV Display. Part 2 -  The drawing process is really quite simple.  The pic microcontroller puts 00000000 00000000 on the eeproms address bus    (selects the first address) This byte of info    (at that address) is now placed on the data bus and all RED GREEN AND BLUE __ Designed by Radio LocMan

8x85 RGB POV Display. Part 3 -  Things to note in the source code: You can easily define how many frames of animation are in your animation loop by changing the total_frames variable to how ever many frames you have.  The flying animation example has 178 frames.  If you only have __ Designed by Radio LocMan

9 Second Digital Readout Countdown Timer -  This circuit provides a visual 9 second delay using a 7 segment digital readout LED.  When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high.  When the switch is opened,  __ Designed by Bill Bowden


Display Circuits:  #'s - C       D - I       J - N       O - T       U - Z

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