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

Last Updated:  11/30/2017 04:08:54 PM

Circuits Designed by Dave Johnson, P.E.

Ten Turn Pot Forms Frequency ReadoutLet’s 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 Johnson P.E.-January, 2008




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Techniques for 92% Efficient LCD Illumination -  Linear Technology AN55 __ Designed by Jim WilliamsAug 1st, 1993

Techniques for 92% Efficient LCD Illumination -  AN55 Linear Technology This publication details several LCD backlight circuits which feature 92% efficiency.  Other benefits include low voltage operation, synchronizing capability, higher output power for color displays, and extended dimming range.  Extensive coverage of practical issues includes layout problems, multi-lamp displays, __ Linear Technology/Analog Devices

Techniques illuminate backlit LCDs with high efficiency -  01/06/94 EDN Technical Article: Getting a backlight LCD lamp to turn on is just the first step in the design process.  Achieving and maintaining high efficiency requires attention to both circuit-design and physical-layout details.   __ Circuit Design by Jim Williams, EDN's most revered contributor, passed away in June 2011 after a stroke.  He was 63.

Telephone #Display -  The given circuit, when connected in parallel to a telephone, displays the number dialed from the telephone set using the DTMF mode.  This circuit can also show the number dialed from the phone of the called party.  This is particularly heLPFul for receiving any number over the phone lines.  The DTMF signal—generated by the phone on

Telephone #Display wlwectronICsworld -  The given circuit, when connected in parallel to a telephone, displays the number dialed from the telephone set using the DTMF mode.  This circuit can also show the number dialed from the phone of the called party.  This is particularly heLPFul for receiving any number over the phone lines.  The DTMF signal—generated by the phone on

Teletext Devices -  Specifications and designs are subject to change without notice.
Use on your own risk. __ Designed by Mijo Kovacevic, S51KQ

Ten Turn Pot Forms Frequency Readout -  Let’s 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 Johnson P.E.-January, 2008

Tester checks LCDs -  10/03/02 EDN-Design Ideas RF oscillator uses current-feedback op ampManufacturers of electronic equipment use LCDs for calculators, watches, mini-videogames, and pagers, for example.  In comparison with LED-based displays, which consume power on the order of tens of milliwatts, an LCD consumes only a few microwatts.    __ Circuit Design by D Prabakaran

TFT Bias (5V AT 40mA, 10V AT 2mA,-10V AT 2mA) & White LED Backlight Supply from Single Li-Ion Cell -  The LT1942 is a highly integrated quad switching regulator designed to provide all necessary power supply functions for TFT displays, including the white LED backlight driver.  The TFT supply output voltages are independently set, unlike charge pump solutions which have many limitations.  __ Linear Technology/Analog Devices App Note, Mar 24th 2010

TFT-LCD Bias Generator: 10V, 24V,-6V Output -  With a small external charge pump network, the LT1947 produces all three required bias voltages for TFT-LCD displays: 10V AT 150mA, 24V AT 10mA and -6V AT 10mA__ Linear Technology/Analog Devices App Note, Mar 24th 2010

TFT-LCD Bias Generator: 12V, 20V,-6V Output -  With a small external charge pump network, the LT1947 produces all three required bias voltages for TFT-LCD displays: 12V AT 120mA, 20V AT 10mA and -6V AT 20mA__ Linear Technology/Analog Devices App Note, Mar 24th 2010

The Cheap But Useful ErICsson Cell Phone Display GA629 -  You used to have an Ericsson Cell Phone GA628 and you also loved it very much, however after few years of using, you’ve decided to change a brand new cell phone and you just threw it inside the drawer and never touch or look on it after that?

Thermally Compensate LCD Contrast BIASs -  03/16/95 EDN-Design Ideas The circuit in Fig 1 provIdeas digital control and automatic thermal compensation for LCD contrast bias.  This control and compensation eliminates the need for panel-mount hardware and frequent manual adjustment of LCD contrast in changing temperature environments.  Major components in Fig 1 include an inverting current-mode PWM regulator, __ Circuit Design by Damian Anzaldo, AVO International-Biddle Instruments, Blue Bell, PA

Thermometer with Four-Digit LED Display -  Until recently, the Philips SAA1064 LED driver IC has been a sort of unofficial standard for driving seven-segment LED displays.  It can be used to implement four-digit displays that can be driven over an I2C bus.  must register on this site __ Designed by Published in Elecktor July/Aug, 2010

Three Channel Integrated Multiplexer & Line Driver -  The LT6555 is a complete 3-channel wideband video 2:1 multiplexer with internally set gain of two.  This part is ideal as an output port driver for HD component or high-resolution RGB video products.  The basic application circuit is shown here with terminations shown on all ports, though in many applications the input loading__ Linear Technology/Analog Devices App Note, Mar 25th 2010

Three Channel, Single Supply Video Line Driver (AC Coupled) The LT6553 ultra-high-speed triple video driver configured for single-supply AC-coupled operation.  This part is ideal for HD or high-resolution workstation applications that demand high bandwidth and fast settling.  The amplifier gains are factory-set to two by internal resistors__ Linear Technology/Analog Devices App Note, Mar 25th 2010

Three-Colour Display using Bicolour LEDs -  Transistors T1 through T20 form a grid to which common-cathode bicolour LEDs  (LED1 through LED10) are connected.  Transistors T1 through T10 have their collector terminals connected to the emitter of transistor...__ Electronics Projects for You

Tiny Regulators Drive White LED Backlights -  Design Notes 231__ Linear Technology/Analog Devices

TLC5940 PWM dimming provides superior color quality in LED video displays -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs.  LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors.  LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost.   __ Designed by Texas Instruments App Notes, 18-Apr-06

TPS60230 WLED Charge Pump -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs.  LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors.  LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost.   __ Designed by Texas Instruments App Notes, 9-Nov-05

Tricks improve on Excel LCD initialization -  04/11/02 EDN-Design Ideas A previous Design Ideas on using Excel for LCD initialization relies on the user for cutting and pasting from Excel into an editor (Reference 1].  It appears that it would take a minimum of six keystrokes or mouse strokes from one character to a new character to perform this operation.  This procedure does not allow for the addition of comments, which would be advantageous in the maintenance __ Circuit Design by Aubrey Kagan, Weidmüller Ltd, Markham, ON, Canada

Trip the Light Fantastic with LED Gadget Freaks -  Here is a collection of the best LED gadgets that have made themselves home in Gadget Freak.  

Triple Video Line Driver (DC Coupled) -  In DC-coupled systems, the video swings are fixed in relation to the supplies used, so back-terminated cable drivers need only provide 2V of output range when optimally biased.  In most cases, this permits operation on lower power supply potential  (s) than with AC-coupling  (unclamped mode) .  Generally DC-coupled circuits use split__ Linear Technology/Analog Devices App Note, Mar 25th 2010

Two nixie display clock -  My clock building habit is apparently as bad as ever.  This time, it was inspired by a stash of Burroughs B5092s, so I needed to vertically align it.  Also, since I wanted to make it as small as possible, I wanted to keep nearly everything surface mount, so I abandoned the idea of using 74141s in favor of standard BCD to decimal converters plus some external drive transistors.  No need to multiplex since I'm only using two tubes, so this design is actually pretty straightforward.   __ Designed by © 2007 Riad S. Wahby

Two-Input Video Fader -  In some cases it is desirable to adjust amplitude of a video waveform, or cross-fade between two different video sources.  This circuit provides a simple means of accomplishing this.  The 0V to 2.5V control voltage provides a steering command to a pair of amplifier input sections; at each extreme, one section or the other takes__ Linear Technology/Analog Devices App Note, Mar 25th 2010

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


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