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Sensors / Detectors: Automotive Circuits
Sensors / Detectors -- Main Page
Automotive:  #'s       A-B       C-D       E-F       G-I        J-M       N-S      T-U      V-Z


Last Updated: April 07, 2016 01:01 PM
Circuits Designed by Dave Johnson, P.E. :
  • 125khz Wireless Smart Key Detector -  This circuit will turn on an indicator light whenever it detects a smart car key containing an RFID chip . . . [Circuit by David A. Johnson P.E.,  07/12/06]
  • 12v DC Motor with Logic Controlled Automatic Brake -  There are times when you would like to control a DC motor using a simple +5v logic swing signal. The circuit below performs this feat and also includes an automatic motor braking circuit. When the input logic signal swings from 0v to +5v, the n-channel . . . [Hobby Circuit designed by Dave Johnson P.E.,  02/18/10]

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

10A car battery charger -  The charger is suitable for lead-acid car batteries and it is assembled in two units: a metal box with the toroidal transformer, instrument, lights, etc, and a small plastic box housing the voltage and temperature circuit. Connection between main box and sensor is realized with a standard 3 core x 1mm, electric cable, 4m long. Its resistance is factored in the circuit calculations and it is the limiting resistor against. . . 

 

12 Volt to 9 Volt DC Converter -  Car Converter for12 Volt to 9V. . . .  [Tony van Roon's circuit]

 

125khz Wireless Smart Key Detector -  This circuit will turn on an indicator light whenever it detects a smart car key containing an RFID chip . . . [Circuit by David A. Johnson P.E.,  07/12/06]

12V 300W 4 channel car Amplifier -  Schematic only, no circuit description. . .  [designer not identified]

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12v car lamp flasher -  Schematic only, no circuit description. . .  [CircuitoZ.net, contact Ruddy]

 

12v DC Motor with Logic Controlled Automatic Brake -  There are times when you would like to control a DC motor using a simple +5v logic swing signal. The circuit below performs this feat and also includes an automatic motor braking circuit. When the input logic signal swings from 0v to +5v, the n-channel . . . [Hobby Circuit designed by Dave Johnson P.E.,  02/18/10]

 

12V to +/-30V DC to DC Converter -  This is a DC to DC converter for car power Amplifier. 12V input generates +30V and -30V output for preamp or power Amplifiers. Circuit uses SG3525 IC, Mosfets and switching power supply. . . 

 

12V to 9V Car Converter -  Car Converter for12 Volt to 9V. . . .  [Tony van Roon's circuit]

 

13.8V Power Supply/ Charger -  A supply for testing and working on car Amplifiers, up to about 500 Amps!. . .  [Rod Elliott (ESP)]

 

1558VIN 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 power loss (and minimal temperature rise) . . .  [Linear Technology App Note - , Mar 9th 2012]

 

15W mono car amplifier using TA7227P -  Schematic only, no circuit description included. . .  [designer not identified]

 

160 Baud ALDL Hardware Interface -  This interface allows vehicle's ALDL data stream to be displayed in real time on a PC using simple software. hardware is designed to be able to be constructed by average hobbyist who has a temperature controlled soldering iron and basic skills in constructing simple electronics. It uses a minimum of (readily available) components consistent with good electronics design. . . . 

 

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Automotive:  #'s       A-B       C-D       E-F       G-I        J-M       N-S      T-U      V-Z


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