Questions tagged [reverse-polarity]
For questions about the operation and/or protection of polarized electronic components when biased in reverse. Consider also using the "protection" tag and/or tag(s) for the polarized components in question (e.g. "diodes").
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Reverse Polarity Circuit Protection
I have an adjustable voltage battery charger that goes from 6v to 14.8v and I need a reverse polarity protection to substitute the old one, which doesn't work. I mounted a circuit based on the ...
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Easy Overvoltage and Reverse polarity protection circuit
I'm looking for the simplest and most effective way to add an overvoltage and reverse polarity protection network to a signal line connected to an MCU, the maximum allowable voltage at the MCU pin is ...
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Finding Is, Id of a Diode in reverse-bias mode
Excuse me, sir,
I'm currently finishing my lab experiment report but I got stuck finding Id and Is of a Diode in reverse-biased mode.
Here is the question: Vin is in the range of 0V to 18V with the ...
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Reverse current blocking FET circuit for batteries, does it work?
Based off of a previous post found here, I've created this circuit below to simulate the reverse current coming back from an FET. I've replaced the switch with a NMOS that's controlled by the presence ...
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Clarification on the Application of a p-Channel MOSFET in a Circuit Diagram
I am seeking clarification on the application of a p-channel MOSFET as illustrated in the diagram below. Could someone please provide an explanation?
In the diagram, legs 1, 2, 6, and 5 serve as ...
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Polarity change circuit - reverse polarity with only one relay
I was looking for a polarity change circuit - (reverse polarity) with a single relay but I didn't find it or maybe I don't identify it, the only thing I've found are with two relays, do you have any ...
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Auto sun tracking relay wiring?
Ok here's a bullet list of what I'm working with
• 1 5v DC 2 wire reversible electric motor
• External 5v DC power source (battery pack)
• 2 12v small solar panels ( for signaling left or right ...
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Does a negative base current in BJT npn mean that the operation mode is Reverse Active?
Given Vce = 2V, Ic = 1.7mA, and Ie = 1.6 mA, I used KCL to determine that Ib = -0.1 mA. Does this mean that the BJT npn is in reverse active mode?
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Appropriate Overcurrent, Overvoltage, and Reverse Polarity Protection Circuit for Raspberry Pi 4?
I'm new to electronics but I'm trying to power a Raspberry Pi 4 (model b) using an external power supply for testing purposes[5V @ 3A]. This is possible via the GPIO, using pin 2 and pin 6 as ground ...
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How to protect a device from reverse polarity and over-voltage?
I am designing a device that will include a DC power jack. There is an external wall adapter that converts the 110-230 VAC from the mains to 20 VDC. Here is the schematic:
I intend to use a standard ...
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How to choose reverse polarity protection - diode vs MOSFET
I am reviewing the power stage of a board which is to be connected to a wide range of cars and motorbikes, with internal combustion engines, old, new, 2 stroke, 4 stroke, etc.
Current schematic looks ...
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Reverse polarity, over-voltage and over-current protection for a "breadboard add-on board"
I am designing a small utility board that should attach to a breadboard and take power from it.
It can be described as the opposite of this SparkFun Breadboard Power Supply: instead of powering the ...
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BJT B-E Zenering: whither the collector?
So, I'm trying to analyze how the circuit in this question behaves when subject to reverse battery (vs. being driven from OUT to IN), and I'm running into a severe snag in the process, though. It ...
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Reverse polarity protection for parallel connection of 18650 batteries
I want to use two Li-Ion 18650 batteries in the device. The batteries need to be connected in parallel and they can be removed from the device (holder).
The device itself is protected from incorrect ...
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Same MOSFET component but reversed arrow
I'm trying to implement a USB PD controller, STUSB4500, but the typical application example shows 2x P-Channel MOSFETs STL6P3LLH6 with different arrow indications. I'm now confused about the pins, T4 ...
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