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Driver Circuits
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Last Updated on:
Sunday, July 26, 2015 06:24 AM

Circuits Designed by Dave Johnson, P.E. :

 

0.5v Negative Supply  -  Although not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps. It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits,  . . . [Circuit by Dave Johnson P.E.,  07/13/06]

 

1 Line Telephone Line Status Indicator  -  This circuit monitors one phone line . . . [Circuit by Dave Johnson P.E.,  06/10/00]

 

1.5v LED Flasher Version A  -  Many published circuits that flash LEDs need 3 volts or more. This circuit uses only a single inexpensive C-MOS IC and flashes the LED for a full year on a single 1.5volt AA alkaline battery cell. The circuit uses a charge pump technique to provide . . . [Circuit by David A. Johnson P.E.,  06/04/00]

 

10 LED Sequential Flasher using Low Powr  -  A while back I posted a flasher circuit which flashed 10 LEDs sequentially. That circuit was powered by four AA alkaline cells. The circuit below operates much the same way but has been modified to run from a single 3v CR2032 lithium coin cell . . . [Circuit by David A. Johnson P.E.,  04/17/11]

120 VAC / 240 VAC Indicator  -  Two LEDs indicate if a power line has 120vac or 240vac voltage on it . . . [Hobby Circuit designed by Dave Johnson P.E.,  07/09/06]

 

1-Nimh Cell powers White LED  -  There are a lot of white LED driver circuits floating around. A popular circuit called the “Joule Thief” can drive one white LED from a single 1. 2v or 1. 5v battery cell. Most of these circuits use one or two transistors to form a voltage boost circuit . . . [Hobby Circuit designed by Dave Johnson P.E.,  09/26/09]

 

1us LED Pulse Driver + Voltage to Frequency Converter  -  This circuit receives the signal from the above amplifier and launches powerful 1uS infrared light pulses from a low cost LED that are frequency modulated by the audio information. The 10KHz center frequency of the pulse stream is low enough so a standard . . . [Hobby Circuit designed by Dave Johnson P.E.,  03/22/99]

 

1W White LED Night Light  -  As many of you know, I have a pet peeve with poorly made LED night lights. Often, the light from the LED quickly fades, so within months, the light is useless. I have posted several versions of modified night lights using higher quality components. This circuit is yet another version, which produces much more light than those other designs.  . . . [Hobby Circuit designed by David Johnson P.E.,  11/06/08]

 

24 Volts AC to 24 Volts DC Power Supply  -  The idea for the circuit below came from a company needing to power several 24v DC LED assemblies from an existing 24vac supply. They did not need a rock solid and regulated 24 volts but a voltage which hovered around that voltage. Running the AC through . . . [Hobby Circuit designed by David Johnson P.E.,  02/20/11]

 

24V DC Powered Beeper with 4 Separate Inputs  -  24vac is a popular voltage. It is often used in low voltage lighting systems and industrial controls. It is much less dangerous than 120vac/240vac line voltages. This hobby circuit below is one method to efficiently power a cluster of 7 white LEDs from 24vac.  . . . [Hobby Circuit designed by David Johnson P.E.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

0.5v Negative Supply  -  Although not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps. It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits,  . . . [Circuit by Dave Johnson P.E.,  07/13/06]

 

1 component drives stepper motor  -  The extremely simple circuit in Fig 1 drives a stepper motor directly from 12V ac , 60 Hz power supply. Usually you need switched-dc voltages to drive a stepper motor. But a stepper motor will run off ac lines if you introduce a 90° phase shift between the voltages applied to the motor's two windings. In this case only one 6. 8uF non polarity capacitor is needed. . .  [ info @ wzmicro.com]

 

1 I/O line drives shift register with strobe  -  03/28/13  EDN Design Idea   This Design Idea shows how a single microcontroller port can drive a lot of output lines through shift register. . .  [by Zoran Mijanovic & Nedjeljko Lekic]

 

1 Line Telephone Line Status Indicator  -  This circuit monitors one phone line . . . [Circuit by Dave Johnson P.E.,  06/10/00]

 

1 Microcontroller Pin Drives Two LEDs With Low Quiescent Current  -  02/07/08  EDN Design Idea   Two simple circuits allow a battery-powered microcontroller to drive two LEDs. . .  [by Antonio Muñoz, Laboratorios Avanzados de Investigación del I3A, Zaragoza, Spain, and Arturo Mediano, PhD, GEPM University of Zaragoza, Zaragoza, Spain]

 

1 microcontroller pin senses ambient light, controls illumination  -  10/26/06  EDN Design Idea   LED circuit senses light and controls its own brightness. . .  [by Loren Passmore, Berkeley, CA]

 

1 Wire Barometer  -  By using a dual voltage supply, instrument precision and/or instrument range can be improved without adding significantly to the parts count. . . .  [from A.G. Miller's web site]

 

1 wire brings power & data to LCD module  -  01/27/14     EDN Design Idea   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 solution - Embedded systems frequently use HD44780 - type 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 8 - bit mode, it requires at least 10 I/O lines (D0D7, EN, RS). Configured in 4 - bit mode, it requires at least six I/O lines (D4D7, EN, RS). . .  [by Benabadji Noureddine]

 

1.5 Volt 1970's Style Caboose Marker Flashing Red LED Light  -  A circuit that drives a red LED from a 1.5volt battery and simulates an incandescent light. Duty cycle can be changed by selecting resistor values. . .  [From Dick Cappels' project pages]

 

1.5V battery powers white-LED driver  -  09/30/04  EDN Design Idea   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. . .  [by Steve Caldwell, Maxim Integrated Products, Chandler, AZ]

 

1.5v LED Flasher Version A  -  Many published circuits that flash LEDs need 3 volts or more. This circuit uses only a single inexpensive C-MOS IC and flashes the LED for a full year on a single 1.5volt AA alkaline battery cell. The circuit uses a charge pump technique to provide . . . [Circuit by David A. Johnson P.E.,  06/04/00]

 

10 LED Sequential Flasher using Low Powr  -  A while back I posted a flasher circuit which flashed 10 LEDs sequentially. That circuit was powered by four AA alkaline cells. The circuit below operates much the same way but has been modified to run from a single 3v CR2032 lithium coin cell . . . [Circuit by David A. Johnson P.E.,  04/17/11]

 

12 DB Amplifier & High Current Line Driver with DC Servo  -  AS024 Application Note (app note 11/02) . . .  [Jenson Transformers]

 

12 V Florescent lamp driver circuit  -  Here is a simple and effective circuit for driving florescent lamps from a 12 V supply. The circuit is nothing but consists of an oscillator, a MOSFET switch and a step-up transformer for driving the florescent lamp. The IC1 TLC555 is. . .  [Designer's name not given]

 

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. . . .  [Circuit designed by Aaron Cake]

 

12 Volt fluorescent lamp drivers  -  Three schematics of 12 V drivers for 2, 8 and 20 Watt, plus a lot of explanations about fluorescent tubes. Use the drivers for camping, emergency, boating, etc. . . .  [Manfred Mornhinweg]

 

120 VAC / 240 VAC Indicator  -  Two LEDs indicate if a power line has 120vac or 240vac voltage on it . . . [Hobby Circuit designed by Dave Johnson P.E.,  07/09/06]

 

128x64 LCD assembly Driver for AT90S2314  -  Here you will find a source code to drive a  graphics  LCD display 128x64 pixels with  AT90S2313.The  connections between LCD and  AVR, you will find  them to the source code. . .  [Designed by Vassilis Serasidis]

 

12VDC Fluorescent Lamp Driver  -  A number of people have been unable to find the transformer needed for the Black Light project, so I looked around to see if I could find a fluorescent lamp driver that does not require any special components. I finally found one in Electronics Now. Here it is. It uses a normal 120 to 6V stepdown transformer in reverse to step 12V to about 350V to drive a lamp without the need to warm the filaments. . . .  [Aaron Cake]

 

13W Integrated CFL using IR53H420  -  Features Drive 13W Compact Lamp 110 or 220 Vac Input High-Frequency Operation (34kHz) Soft Start with Cathode Preheating (45kHz) Lamp Removal Protection Burst Mode with Auto Restart IR53H420 Integrated Half-Bridge This application note is intended. . .   

 

15–58VIN to 33.3V 3A LED Automotive Headlight Driver with Up to 98.5% Efficiency  -  Airplanes and big trucks with 24V batteries need powerful, efficient and robust headlights and spotlights. This circuit shows a 33.3V, 3A (nine Luminus SSR-90 LEDs) buck-boost LED driver that runs from 15V to 58V input with up to 98. 5% efficiency. The 4-switch synchronous topology drives high power LEDs with minimal switch . . .  [Linear Technology App Note, Mar 9th 2012]

 

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 myself - a 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 packs - a fair sum for me at the time. . .  [John DuBois designer]

 

1-Nimh Cell powers White LED  -  There are a lot of white LED driver circuits floating around. A popular circuit called the “Joule Thief” can drive one white LED from a single 1. 2v or 1. 5v battery cell. Most of these circuits use one or two transistors to form a voltage boost circuit . . . [Hobby Circuit designed by Dave Johnson P.E.,  09/26/09]

 

1us LED Pulse Driver + Voltage to Frequency Converter  -  This circuit receives the signal from the above amplifier and launches powerful 1uS infrared light pulses from a low cost LED that are frequency modulated by the audio information. The 10KHz center frequency of the pulse stream is low enough so a standard . . . [Hobby Circuit designed by Dave Johnson P.E.,  03/22/99]

 

1W White LED Night Light  -  As many of you know, I have a pet peeve with poorly made LED night lights. Often, the light from the LED quickly fades, so within months, the light is useless. I have posted several versions of modified night lights using higher quality components. This circuit is yet another version, which produces much more light than those other designs.  . . . [Hobby Circuit designed by David Johnson P.E.,  11/06/08]

 

2 Components Drive Stepper Motor  -  01/19/95  EDN Design Idea   The extremely simple circuit in Fig 1 drives a stepper motor directly from 120V ac, 60 Hz. Usually you need switched-dc voltages to drive a stepper motor. But a stepper motor will run off ac lines if you introduce a 90° phase shift between the voltages. . .  [by Carl Spearow, Basler Electric,m Highland, IL]

 

2 PIC pins drive six LEDs  -  06/09/14 EDN Design Idea   Here’s a take on LED multiplexing with minimal output pins. This Design Idea demonstrates a new method of driving six LEDs with only two I/O lines from a microcontroller, and so is particularly suitable for any pin-limited chip. It uses a pair of I/O lines combined with a pair of complementary bipolar transistors. . .  [by Benabadji Noureddine]

 

20 dB Amplifier & High Current Balanced Line Driver  -  AS023 Application Note (app note 7/02) . . .  [Jenson Transformers]

 

24 Volts AC to 24 Volts DC Power Supply  -  The idea for the circuit below came from a company needing to power several 24v DC LED assemblies from an existing 24vac supply. They did not need a rock solid and regulated 24 volts but a voltage which hovered around that voltage. Running the AC through . . . [Hobby Circuit designed by David Johnson P.E.,  02/20/11]

 

24V DC Powered Beeper with 4 Separate Inputs  -  24vac is a popular voltage. It is often used in low voltage lighting systems and industrial controls. It is much less dangerous than 120vac/240vac line voltages. This hobby circuit below is one method to efficiently power a cluster of 7 white LEDs from 24vac.  . . . [Hobby Circuit designed by David Johnson P.E.

 

2-channel Audio Amplifier drives stepper motor  -  12/01/06  EDN Design Idea   Pulse-width-modulated stereo power amplifier saves components. . .  [by Phill Leyva and Bill Quach, Maxim Integrated Products, Sunnyvale, CA]

 

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Driver Circuits
Drivers:  #'s      A      B - C       D - G       H - K       L - N       O - R       S      T    
U-Z


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