All Questions
Tagged with protection automotive
23
questions
0
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answers
74
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Automotive generator overcurrent protection
I am rebuilding the wiring harness for the engine of a 50+ years old car. There are a few things in the original design that I am planning to improve while at it. My main concern is part of the ...
- 1
4
votes
0
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150
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What is an "integrated self-opening load switch" actually called?
Here is a throw-away circuit to illustrate the behaviour I'm looking for:
simulate this circuit – Schematic created using CircuitLab
Basically a load switch, but during an over-voltage event ...
- 3,229
1
vote
2
answers
847
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Reverse voltage spike protection on high-side of a (coiled) relay without flyback diode
I have a microcontroller interfacing with a normally-open automotive relay on the high-side, through a P-MOSFET. When the microcontroller closes the P-MOSFET's Source & Drain (by sending LOW ...
- 113
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votes
1
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483
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12V vehicle voltage filtering and protection: R or L in the diagram
Can I replace the 62 Ohm resistor in this schematic by an inductor ? Would it be any better and how to size it ?
https://electronics.stackexchange.com/a/347348/35737
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1
answer
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Conditioning for automotive electronics [closed]
I have a simple application: convert an automotive throttle 0-5V line to 0-2.5V on a circuit near (and feeding into) a fan controller. Very loose maximum frequency is 10Hz. I reduced R1 because the ...
- 3,229
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129
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Automotive protection: TVS, thermistor, or both?
This is a follow up question regarding my previous post where I was informed my issue was due to inrush current.
I have a DC1601B-C buck-boost converter outputting 12V and up to 20 Amps. It is hooked ...
- 175
2
votes
0
answers
373
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Automotive reverse current and transient protection
Adding reverse polarity and reverse current protection to an automotive circuit seems a bit challenging, especially when driving loads in the 10 A range (e.g. seat heater). Diodes on the power line ...
- 21
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87
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150 A 12 - 16 V DC Short Circuit Protection
I am powering a ROV from a 4S LiPo battery (12.0 V minimum, 16.8 V maximum). The resistance of the battery is 36 mΩ, so that a maximum current of 470 A can flow through a short-circuit. In order to ...
- 37
0
votes
1
answer
109
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Car 12V Supplied device - Requirements
I am currently designing a device that is intended to be used outside the car and supplied by car 12V socket (also during the drive).
The question is: Are there any specific requirements for example ...
- 983
0
votes
3
answers
280
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Wide Voltage Automotive Status To Microcontroller Input
I need to monitor the status of a wire in an automotive application that can have 10-40VDC on it at any time. What is a good approach to limit the voltage to a microcontroller input across such a wide ...
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3
votes
2
answers
5k
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How to mitigate voltage spikes when turning car ON?
I need to connect some things (LEDs and other misc.) to the 12V rail in a car. I understand that this rail gets a beefy ~100V spike on ignition. I have also heard that the battery soaks this spike (...
- 312
4
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2
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Zener Diode Overvoltage Protection
(source: learningaboutelectronics.com)
Design Operating Characteristics
Current Draw: 2 amps
Operating Voltage: 13.5 V
This design will operate in an automotive environment and we would like to ...
1
vote
1
answer
2k
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Protection against back EMF
I am trying to build an ignition cut module with an arduino as part of a DIY quickshifter on a motorcycle. I have build the circuit shown below.
The points A and B on the circuit fit inbetween the ...
- 11
0
votes
1
answer
876
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Transient voltage protection on an automotive circuit
I am currently working on a DIY quickshifter. This stops the spark for a very short time when changing up gears so that gears can be changed at full throttle.
I have a working circuit, but it ...
- 11
2
votes
1
answer
668
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Simple Reverse-polarity Protection for Automotive DC-DC Converter: FET or Diode?
I have recently decided to upgrade my old van by installing a few 5V/3A sockets using a 100W 12V-to-5V downstep buck that has no reverse-polarity protection. A little bit of searching here and ...
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