Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


Sensors / Detectors: Automotive Circuits
Sensors / Detectors -- Main Page

Automotive: 
#'s - A       B - E       F - S       T - Z 


Last Updated: December 31, 2017 05:06 AM
Circuits Designed by Dave Johnson, P.E. :

Alarm Beeps when the “Check Engine” Light Turns On - When wired into a car’s indicator light panel, this circuit will turn on a loud beeper when the “check engine” light turns on. . . Circuit by Dave Johnson P.E.-July, 2006

Automotive Electrical Voltage Indicator - This circuit will indicate if an automotive electrical circuit has zero volts or 12 volts present.. . . Circuit by David A. Johnson P.E.-July, 2006

Auxiliary 12v Automotive Style LED Light Makes Table Lamp - This circuit provides about one watt of non-isolated DC power for an automotive type 12v LED array lamp in addition to a standard incandescent table lamp . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2006

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747




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

A 34W LED Driver with Robust Output Short-Circuit Protection -  Figure 1 shows the LT3796 configured as a boost converter to drive a 34W LED string from a wide input range.  The LED current is derated at low input voltages to prevent external power components from overheating.  The front-end current sense amplifier monitors the input current by converting the input current to a voltage signal __ Linear Technology/Analog Devices App Note, Jun 29th 2012

A 555 -Timer Based Motorcycle Alarm -  Motorcycle Alarm Circuits:  This circuit features an intermittent siren output and automatic reset.  it can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition.  By adding external relays you can immobilize the bike, flash the lights etc. Now With Free SiMetrix Circuit Simulation.  __ Designed by Ron J.

A CMOS Based Motorcycle Alarm -  Motorcycle Alarm Circuits:  This circuit features an intermittent siren output and automatic reset.  it can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition.  By adding external relays you can immobilize the bike, flash the lights etc.  it's easily adapted for a 6-volt system - so it will protect your "Classic Bike". - Now With Free SiMetrix Circuit Simulation.  __ Designed by Ron J.

A CMOS Based Single Zone Alarm -  Single-Zone Burglar Alarm Circuits:  This circuit features automatic Exit/Entry delays, timed Bell Cut-off and System Reset.  it has provision for normally-open and normally-closed switches and will accommodate the usual input devices (Pressure Mats, Magnetic Reed contacts, Foil Tape, PiRs and inertia Sensors).  __ Designed by Ron J.

A CMOS Based Vehicle Anti-Theft Alarm -  Automobile Alarm Circuits:  This car alarm circuit features Exit and Entry delays - an instant alarm zone - an optional intermittent siren output - and an automatic Reset.  By adding external relays you can immobilize the vehicle and flash the lights.  __ Designed by Ron J.

A Digital Voltmeter for Your Car -  A PIC  microcontroller makes it a snack to build.__ SiliconChip

A Fuel Cut Defeater for Cars with Variable Boost Control -  Are you intending to build the Variable Boost Control described earlier? if so, you will need to built this simple Fuel Cut Defeater (FCD) to eliminate the standard factory fuel cut which typically occurs at boost levels about 16-17psi.  The unit is not adjustable, so no external controls are required.__ SiliconChip

A Low Battery Cutoff -  Also acts as a Master On / Off Switch.  NOW, Also a New P-Mos Version.  Supplies Positive voltage to grounded devices.   __ Designed by G.L. Chemelec

A Simple Circuit Car Battery Charger psimages -  This very simple circuit uses a transformer , two diodes , a capacitor and an ammeter.  To charge a battery just connect+ and terminals of circuit to corresponding terminals of battery.  When battery is not charged, ammeter reading shows 1-3 amps__ 

A Simple Circuit Transistor Based Motorcycle Alarm -  Motorcycle Alarm Circuits:  This is an even simpler transistor based motorcycle alarm.  The circuit features a timed output and automatic reset.  it can be operated manually using a key-switch or a hidden switch.  By adding an external relay, it will set itself automatically - and/or immobilize the machine - every time you turn-off the ignition.  it's easily adapted for a 6-volt system - so it will protect your "Classic Bike". - Now With Free SiMetrix Circuit Simulation.  __ Designed by Ron J.

A Transistor Based Motorcycle Alarm -  Motorcycle Alarm Circuits:  This circuit features a timed output and automatic reset.  it can be operated manually using a key-switch or a hidden switch.  By adding an external relay, it will set itself automatically - and/or immobilize the machine - every time you turn-off the ignition.  it's easily adapted for a 6-volt system - so it will protect your "Classic Bike". - Now With Free SiMetrix Circuit Simulation.  __ Designed by Ron J.

Acceleration meter for cars -    NOTE:  This page is available in Greek and English language.  This circuit it is count the acceleration from -1000mg up to +1000mg.  Can be used in lot of applications like cars, elevators, ramps and more.   __ Designed by Michael Karaoglanidis

Adaptive Windscreen Wiper Control -  This is easy to install to the usual system. (Not for instance MAZDA 626, where the external connections  are literally avoided.) You have to find a wire which has a voltage in position '1' and then you cut that wire.  After that You install the "ADAPWiPE" between the break of wire just like the circuits diagram  ADAPWiPE.iSS it shows. (immediately after the switch!) __ © Mark Harris 2008

Additional stop Lamp control unit -  in Japan, the car that is equipped with additional stop lamp increased.  This lamp expands the area that shines red at the time of stepping the brake to stop the car and  __ Designed by Seiichi Inoue

Advanced capacitors ensure long-term performance stability -  01/24/13  EDN Design Ideas:  To meet the demanding performance and harsh environmental conditions of automotive applications, component manufacturers have developed professional-grade tantalum capacitors that ensure long-term electrical performance stability.  The professional tantalu __ Circuit Design by Radovan Faltus, AVX Tantalum Division - January 24, 2013

Agilent TS-5400 Series II Automotive Electronics Functional Test System -  Application Note__ Aligent

Alarm Beeps when the “Check Engine” Light Turns On -  When wired into a car’s indicator light panel, this circuit will turn on a loud beeper when the “check engine” light turns on. . . Circuit by Dave Johnson P.E.-July, 2006

An Automotive Halogen Headlamp Power Supply -  This circuit example demonstrates using a SEPIC -based automotive halogen headlight power supply that improves bulb reliability while also ensuring optimum illumination.  The design maintains 12V at headlight voltage over a 9V to 15V input voltage range.  it works well up to 1Ω interconnection resistance.  The Virtual Remote Sense __ Linear Technology/Analog Devices App Note, Jul 7th 2010

Anti Theft Motorcycle Alarm -  Any number of normally open switches may be used.  Fit the mercury switches so that they close when the steering is moved or when the bike is lifted off its side-stand or pushed forward off its centre-stand.  Use micro-switches to protect removable panels and the lids of panniers etc.  While at least one switch remains closed, the siren will sound.  About two minutes after the switches have been opened again, the alarm will reset.   __ Designed by Ron J

Anti-Hijack Alarm No.3 -  Automobile Alarm Circuits:  Like the first two Hijack Alarms - if a door is opened while the ignition is switched on - the circuit will trip.  And after a few minutes delay - when the thief is at a safe distance - the Siren will sound.  But this time the engine does not go on to fail automatically.  instead - it will continue to run until the thief turns off the ignition.  Then the engine will not re-start. __ Designed by Ron J

Anti-theft Car Alarm -  Here is a simple AntI theft car alarm device for your Car.  it generates a loud alarm when there is an attempt of theft.  When the intruder opens the door, the circuit senses the attempt of theft and after 2 minutes, the alarm will be activated.  The time delay is provided to help the user to leave the car after arming with the __ Designed by D Mohankumar

Anti-Theft Security for Car Audio -  This small circuit, based on popular CMOS NAND chip CD4093, can be effectively used for protecting your expensive car audio system against theft.  When 12V DC from the car battery is applied to the gadget (as indicated by
LED1) through switch S1, the circuit goes into standby mode.  LED inside optocoupler IC 1 is lit as its cathode terminal is grounded via the car audio (amplifier) body.  As a result, the output at pin 3 of gate N1 goes low and disables the rest of the circuit.  __ Learning Electronics

ArroW Lighting-TI DC/DC LED Driver Solution -  in this article, 2 lighting applications of TI TPS40211 will be presented.  TI TPS40211 is a DC/DC LED driver controller which accepts DC voltage up to 52V and is able to fit various kinds of LED lighting application including MR16
as well as streetlamp application.   __ Designed by James Ho, Arrow Asia Pac

Audio Refinement Complete integrated Amplifier -  The Complete' is made to design by Yves-Bernard Andre (YBA).  My unit s/n is an early 00026, probably later copies are different from the first batch.  I used the amp for two years, and the only reason to dig inside it, apart from 'how they did it' curiosity, was to disconnect the volume pot motor.  it returns to zero at each power down __ Contact klausmobile @ yahoo.Com

Audison LR604XR Amplifier (Car Audio) -  Of the few car amplifiers I tested, gutted, decyphered and fixed, this one seems to be the best in design quality.  Too many car amps (although solidly built) are apparently designed by computer class students, too many traces, too many vias, absolutely wrong component placement etc.  And on schematic level __ Contact klausmobile @ yahoo.Com

Auto Batteries Charger -  Schematic only, no circuit description] __ Contact IQ Technologies

Automatic Dual Output Display -  This circuit lights up ten bulbs sequentially, first in one direction and then in the opposite direction, thus presenting a nice visual effect.in this circuit, gates N1 and N2 form an oscillator....__ Electronics Projects for You

Automatic Headlight Brightness Switch -  Driving the highway with your high-beam headlights can really increase your visibility, but can be a blinding hazard for other drivers.  This simple circuit can be wired into your headlight switch to provide automatic switching between high and low beam headlights when there is oncoming traffic.  it does this by sensing the lights of that traffic.  in this way, you can drive safely with your high-beams on without blinding other drivers __ Designed by Aaron Cake

Automatic Headlights Switcher -  Automatic headlamps are the latest convenience in today's cars.  These eliminate the need for the driver to manually switch on or switch off the headlamps in most driving situations.  The automatic...__ Electronics Projects for You

Automatic Speed-Controller for Fans & Coolers -  During summer nights, the temperature is initially quite high.  As time passes, the temperature starts dropping.  Also, after a person falls asleep, the metabolic rate of one’s body decreases.  Thus, initially...__ Electronics Projects for You

Automotive 12V to +-20V converter (for Audio Amplifier) -  The limitation of car supply voltage (12V) forces to convert the voltages to higher in order to power audio amplifiers.  in fact the max audio power x speaker (with 4 ohm impedance) using 12V is (Vsupply+ - __ Designed by Jonathan Filippi

Automotive 5V Regulator with Cold Crank Capability -  The LTC3115-1 is a high voltage monolithic synchronous buck-boost DC/DC converter.  its wide 2.7V to 40V input and output voltage ranges make it well suited to a wide variety of automotive and industrial applications.  A proprietary low noise switching algorithm optimizes efficiency with input voltages that are above, below or even equal to the output voltage and ensures seamless transitions between operational modes.  __ Linear Technology/Analog Devices App Note, Dec 5, 2011

Automotive 9V-19.5Vin to 5V at 1A with 60V Transient Protection & 1.7MHz Switching Frequency -  The LT3682 is a 1A monolithic buck switching regulator that accepts input voltages from 3.6V to 36V and transients up to 60V.  it features an adjustable and synchronizable switching frequency from 250kHz to 2.2MHz.  it also has the ability to monitor the current flowing through the external catch diode, thus providing an extra level of protection against output fault conditions over the entire operating frequency range, regardless of input voltage__ Linear Technology/Analog Devices App Note, Jul 22, 2010

Automotive Electrical Voltage Indicator -  This circuit will indicate if an automotive electrical circuit has zero volts or 12 volts present.. . . Circuit by David A. Johnson P.E.-July, 2006

Automotive Electronic Functional Test using Agilent System Components -  Application Note__ Aligent

Automotive Link Uses Single Wire -  3-Apr-03 EDN Design Ideas:  in the automotive industry, in which the goal is to produce cars with simpler, lighter wiring looms, any interface that uses just one wire instead of two offers a distinct advantage.  The circuit in Figure 1 implements a bidirectional link using a single wire, with the car's chassis or ground conductor providing a negative return path __ Circuit Design by Anthony Smith, Scitech, Biddenham, Bedfordshire, UK

Automotive Relays -  Find out more about automotive relays and their use in renewable applications.   __ Designed by REUK-Renewable Energy UK website

Automotive SENT Interface-Based Thermocouple Temperature Sensor with Cold Junction Compensation using the ADuC7060/ADuC7061 Precision Analog Microcontroller  -  As the auxiliary ADC on the ADuC7060 / ADuC7061 does not have a PGA, both were connected to the primary ADC, and switching between the two was done in software.  The main requirements for SENT include the following: , Bullet text, The associated source code uses the P0.4 digital pin of the ADuC7061 as the SENT output pin.  The source code, particularly the SENT.  h and Sent.  c files can be modified to support other packet formats__ Analog Devices from the Lab

Automotive Switching Regulators Get Input-Transient-Voltage Protection -  01/24/08  EDN Design Ideas:  A simple scheme protects switching regulators against 50V voltage transients in automotive applications __ Circuit Design by Kevin Daugherty, National Semiconductor, Novi, MI

Automotive Voltage Indicator -  Monitors battery voltage; Three-LED Display __ Contact Flavio Dellepiane, fladello @ tin.it

Auxiliary 12v Automotive Style LED Light Makes Table Lamp -  This circuit provides about one watt of non-isolated DC power for an automotive type 12v LED array lamp in addition to a standard incandescent table lamp . . . Hobby Circuit designed by David A. Johnson P.E.-July, 2006

      <<<       This is the last page of #'s -A


Automotive:  #'s - A       B - E       F - S       T - Z 


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.