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Driver Circuits
Drivers:  #'s - A        B - E       F - L       M - R       S - Z

Last Updated on:
Monday, December 25, 2017 01:50 PM

Circuits Designed by Dave Johnson, P.E.

300v Peak to Peak Signal GeneratorThis circuit converts a square wave signal to a +-150 volt output signal with fast 100nS rise and fall times. . . Circuit by Dave Johnson P.E.-June, 2000

40Khz Ultrasound Transducer Driver uses Medium PowerThis crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal . . . Hobby Circuit designed by Dave Johnson P.E.-January, 2006

50ua Current Drives Solid State Relay Requires OnlyMost solid state relays require at least 5ma and often more input control current, to fully turn on the device.  But such current levels often force battery powered circuits to use excessively large batteries.  The relay hobby circuit shown below demands only 50uA of input current . . . Hobby Circuit designed by David Johnson P.E.-June, 2000


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

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.   __ Contact: info @ wzmicro.com

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 __ Circuit Design by John Wettroth, Maxim Integrated Products, Apex, NC

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.   __ Designed by A.G. Miller

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 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

12 V Florescent lamp driver -  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 __ Designed by Radio LocMan

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 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.   __ Designed by Manfred Mornhinweg

12VDC 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

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 App Note is intended __ Designed by Radio LocMan

1-I/O line drives shift register with strobe -  03/28/13  EDN-Design Ideas 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-NiCd Cells Drives Op Amp -  12/05/96 EDN-Design Ideas Low-supply-voltage op amps, such as the LMC6582 and LMC6681 families, feature rail-to-rail I/O with a gain-bandwidth product greater than 1 MHz operating from just 1.8V.  Although impressive, this voltage is not low enough to power these amps using a single alkaline or NiCd/NiMH
cell, which have typical voltages of 1.25 to 1.5V.  It is rather tempting to bridge this gap by designing a DC/DC converter __ Circuit Design by Alexander Belousov, Rego Park, NY

1-Wire 8-bit LCD Reference Design  -  This App Note demonstrates creating a 1-Wire® 8-bit LCD.  The code to drive the DS2408 LCD display is also provided.  The LCD used was the Data Vision Model NO: DV-16252-S1FBLY, however any LCD with this Hitachi 44780 based LCD controller chip can be used.  __ Maxim Integrated

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 __ Circuit Design by Rex Niven

2 Components Drive Stepper Motor -  EDN-Design Ideas 01/19/95    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 applied to the motor's two windings. __ Circuit Design by Carl Spearow, Basler Electric,m Highland, IL

2-channel Audio Amplifier drives stepper Motor -  12/01/06  EDN-Design Ideas Pulse-width-modulated stereo power amplifier saves components __ Circuit Design by Phill Leyva and Bill Quach, Maxim Integrated Products, Sunnyvale, CA

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

300v Peak to Peak Signal Generator -  This circuit converts a square wave signal to a +-150 volt output signal with fast 100nS rise and fall times. . . Circuit by Dave Johnson P.E.-June, 2000

3-Ph BLDC Drive Control with Hall Sensors -  This reference design describes a 3-phase 4-quadrant sensor BLDC motor drive, which can run in both a speed open loop and a speed closed loop.    application is designed for MC68HC908MRxx family dedicated to motor control applications __ Designed by Freescale

3-Phase Motor Driver Prevents Stall -  01/05/95 EDN-Design Ideas The circuit in Fig 1 drives a small 24V, 50-Hz motor at about 30 to 40 Hz for use as a chopper motor.  The best starting speed for the motor is about half the final running speed.  Therefore, the circuit uses an intermediate speed to prevent a stall condition.  The circuit uses IC1Ato count down two cycles after the selection of the intermediate speed.  IC1B's Johnson divide-by-three counter and IC2's gates generate the 1208 phase angle __ Circuit Design by PM Kirkby, Crumpsall Electronics, Surrey, England

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

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

40Khz Ultrasound Transducer Driver uses Medium Power -  This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal . . . Hobby Circuit designed by Dave Johnson P.E.-January, 2006

50ua Current Drives Solid State Relay Requires Only -  Most solid state relays require at least 5ma and often more input control current, to fully turn on the device.  But such current levels often force battery powered circuits to use excessively large batteries.  The relay hobby circuit shown below demands only 50uA of input current . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

555 (TLC555) Relay Driver -  Many integrated circuits have undocumented features or abilities.  This is one of them.  The TLC555 output    (pin 3) can sink a 100mA load to 1.28V.  The open drain transistor reset    (pin 7) can sink 100mA to 1V.  Tying both lines together is permissible because they are logically the same polarity and this potentially doubles the __ Designed by Jim Keith

555 Ignition Coil Driver -  This ignition coil driver is a HOT one! From my recollection, it delivers a nastier spark than the legendary Ford Model T ignition coil.  The circuit uses an inverted 555 oscillator that is coupled to an ON Semiconductor BU323Z Darlington transistor    (350V, 10A) that drives a conventional inductive discharge ignition coil.  In __ Designed by Jim Keith

555 Timer-Based Flyback Transformer Driver -  My 24kV high voltage "Jacob's Ladder" from DIY flyback transformer driver using 555 timer.   __ Designed by simon leorick

555 Voltage Doubler Relay Driver -  These novel relay driver circuits have the ability to pick up a relay with a coil voltage rating equal to double Vcc.  After pickup, the relay armature is held via the application of Vcc.  Under this condition, the coil power is reduced by the square of the voltage ratio, or to 25%.  This is the ultimate in relay economy—the __ Designed by Jim Keith

555-based class-D headphone driver makes great practice Amp -  07/28/14  EDN-Design Ideas This class-D audio amp “plays” to the 555’s strengths. __ Circuit Design by Petre Petrov

5MBd Digital optocouplers targeting low power/low supply voltage applications -  EDN-Design Ideas 01/22/2015    Digital optocouplers provide high voltage insulation and noise rejection for data transmission, with very low power usage __ Circuit Design by Avago Tech Note

5W PLL Stereo Transmitter with LCD -  Here's PLL FM transmitter circuit from china.  This circuit uses the familiar 2SC1971 for final power amplifier stage.   __ Contact: sky @ cantonmade.com and balalove2008 @ hotmail.com

60V Buck-Boost LED driver has up to 98% efficiency, PWM dimming, spread spectrum -  EDN-Design Ideas 10/28/2016    LTC Design Notes: LED driver design is highly efficient, flicker-free, minimizes EMI, and plays well in the automotive environment __ Circuit Design by LTC Design Note

74*245-based Motor driver -  A simple, time-honored approach is to use one or more 74*245 chips    (normally74AC245 is used for maximum current capability) to provide motor drive current.  Here, each channel of drive power is provided by one or more buffer onchip.   __ Designed by Wilf Rigter

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 __ Circuit Design by Hans Krobath

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

8W Fluorescent lamp driver -  Here is the schematic of a simple fluorescent lamp driver circuit based on two transistors.  The circuit uses capacitive ballasting for driving the tube.  An 8 W standard fluorescent tube can be efficiently driven using the circuit.  The two __ Designed by Radio LocMan

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Drivers:  #'s - A        B - E       F - L       M - R       S - Z


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