Monitor Alarm & Indicator Display Multiple Deviation Boundaries - 22-April-10 EDN-Design Ideas Use a microcontroller and its ADCs to indicate process errors. __ Circuit Design by William Grill, Riverhead Systems, Lenexa, KS
Moving-Dot Display Interface Uses Three I/O Lines - 05/01/08 EDN-Design Ideas A moving-dot LED-display interface to a microcontroller uses only three output pins__ Circuit Design by Abel Raynus, Armatron International, Malden, MA
Multifunction LCD Clock with Raspberry Pi - With just two simple Python files, an inexpensive LCD display and a low-cost digital temperature sensor, you can turn Raspberry Pi into a beautiful LCD clock with IP address and temperature...___ Electronics Projects for You
Nokia 3310 LCD & PIC12F629 Thermometer - Device with Nokia 3310 Lcd, Pic12F629 & DS18B20 temperature 1Wire sensor published in magazine "Svijet elektronike" Nr.58 (June / July 2006) . Author: Ivica Novakovic __ Designed by © Ivica Novakovic
Nokia 7650 LCD Controller - Despite nobody seems to own the appropriate documentation, it is possible to use the big cheap color LCD displays of the Nokia series 60 cell phones for home brew projects. I don't even have the docs and it was a rough and painful way, but now it works __
One 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 1 provIdeas 6V bias for LCDs and a separate, quiet negative bias for a GaAsFET power amplifier. This bias combination exists in cell phones__ Circuit Design by John Wettroth, Maxim Integrated Products, Apex, NC
One wire brings power & data to LCD Module - 01/27/14EDN-Design Ideas If you need to connect a small remote LCD display, or your µC has run out of I/O pins, here’s 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)__ Circuit Design by Benabadji Noureddine
One 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__ Circuit Design by Rex Niven
PIC 5x7 Display - The PIC board detects 3rd harmonic distortion of AC power line. __ Designed by Prepared Colin Mitchell
Picxie 2 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
POST Repeater Reads Out Remotely - 12/08/94 EDN-Design Ideas Commercially available power-on self-test (POST) cards for PCs have onboard LED displays that show diagnostic codes during the PC's start-up. This arrangement is usually good enough. But if you were to try to use such a card to fix a crowded PC motherboard, you would appreciate a detachable, remote display__ Circuit Design by Jerzy R Chrzaszcz, Institute of omputer Science Warsaw University of Technology, Warsaw, Poland
Pot Adjusts LCD's Contrast - 02/04/99 EDN-Design Ideas NOTE
: Page includes
several designs. Scroll to find this one. You can use a digitally controlled potentiometer for many purposes. In this example, you can use the device to regulate the contrast of a standard(such as two lines by 40 characters] LCD. You can use the circuit in Figure 1 in a portable test system, in which you need to change the contrast of the LCD as a function of the viewing angle. You choose the contrast setup__ Circuit Design by Jef Collin, CSE Systems, Turnhout, Belgium
Potentiometer Controls LCD Bias - 03/17/94 EDN-Design Ideas Designers of pen-based computers can easily relegate some controls that were previously mechanical, such as switches and potentiometers, to on-screen icons. For example, the circuit in Fig 1 shows one way that digital logic can control the -24V-dc LCD bias using two general-purpose I/O command lines. The DS-1669 from Dallas Semiconductor__ Circuit Design by Michael Cortopassi, Dauphin Technology, Lombard, IL
Precision Wideband Current Probe for LCD Backlight Measurement - DN101 Design Notes___ Linear Technology/Analog Devices
Processor's PWM output controls LCD/LED driver - 27-May-04 EDN-Design Ideas The PWM(pulse-width-modulation] output available from many microprocessors is based on an internal 8- or 16-bit counter and features a programmable duty cycle. It is suitable for adjusting the output of an LCD driver(Figure 1), a negative-voltage LCD driver(Figure 2], or a current-controlled LED driver(Figure 3]__ Circuit Design by Joe Neubauer, Maxim Integrated Products, Sunnyvale, CA
Programable LCD counter with memory backup - This counter based on AT90S1200A its programmable and when shut it down its keeping the current counts to the memory, until to the power on. __ Designed by © Vassilis Serasidis
Provide Effective LCD Drive - 09/28/00 EDN-Design Ideas LCDs find wide use in portable instruments, thanks to their attractive display and low power consumption. The circuit in Figure 1 is an effective driver for LCDs. The circuit comprises two main sections—the ICM7211 drivers (IC2 __ Circuit Design by Luo Ben Cheng, Chinese Academy of Science, Beijing, China
Put Your Own Smiley On GLCD - The regular 16×2 LCD can display characters of only certain dimensions. A graphical LCD (GLCD), on the other hand, can display custom graphics. GLCDs are therefore highly suitable for mobile and...___ Electronics Projects for You
Quad Output Switching Converter Provides Power for Large TFT LCD Panels - DN349 Design Notes __ Linear Technology/Analog Devices
Read isolated digital signals without power drain - 25-Nov-04 EDN-Design Ideas Although optocouplers offer designers a straightforward method of establishing galvanic isolation between circuits that operate at different ground potentials, they do not provide an ideal approach. An optocoupler draws power from the isolated circuit, switches relatively slowly, and loses current-transfer ratio as its light emitter ages__ Circuit Design by Alfredo H Saab and Joseph Neubauer, Maxim Integrated Products Inc, Sunnyvale, CA
Read Multiple Switches & a Potentiometer Setting with One Microcontroller Input Pin - 04/22/10 EDN-Design Ideas Use a single ADC input pin to sense pushbuttons as well as a potentiometer. __ Circuit Design by Kevin Fodor, Palatine, IL
Rolled-Off Noise Source - This is a circuit that generates white noise, rolled-off to drive earphones or a small speaker. White noise creates is a "rushing" sound, which sounds something like air rushing by your ear (s). White noise would be flat with frequency, and since this circuit rolls off within the audio range, I refer to it as "rolled-off" noise. White (or rolled-off) noise __ Designed by Dick Cappels |