Questions regarding physical fuses. Fuses are a safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level. PPTC, PTC, and Polyfuse questions should use the Polyfuse Tag. Please keep in mind that repair questions are typically closed if ...

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Best approach to design or implement short circuit protection?

I'd like to implement a safety mechanism in my circuit to avoid overvoltages/overcurrents in the event of a short, but am unsure as to what what the most robust or appropriate design approach would ...
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2answers
104 views

Bitbang ATMega-328PU with CT210x using avrdude

I have made a breadboard-arduino with an ATMega-328PU and the standard components taking help from http://arduino.cc/en/Main/Standalone I interfaced the CT2102 Breakout Board with this assembly: DTR ...
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1answer
27 views

Overvoltage protection for RS485 inputs

I am using an Analog Devices ADM483E RS485-chip to build a device with RS485-capability. Datasheet here: http://www.analog.com/media/en/technical-documentation/data-sheets/ADM483E.pdf . The finished ...
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1answer
99 views

Appropriate fuse for 12V battery - solar power controller connection

I'm a biologist tracking migratory bats and need to build a bunch of antenna towers to listen for pulses from tagged bats flying nearby. These are off-grid, so we'll have 55W solar panels charging ...
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30 views

Which type of fuse should I use with a coil heater?

Fast blow or time delay (anti surge) type? I have read motors require anti surge fuses to permit higher than rated current for short periods during start up.
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fuse metal alloy with high springiness?

Is there a fuse alloy that would have the same springiness as this except with a little wire that comes out and that plugs into something, so that it could be machined and pressed from one single ...
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0answers
225 views

Can I determine a formula for fuse disconnection times?

This is the first time I have used this stack site so am not 100% sure this question is on topic (based on the tags I couldn't find) but thought someone may still be able to help me. For those not ...
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0answers
355 views

Atmega32 can't verify after setting correct fuses for external crystal. HELP

I am having trouble with some Atmega32A's purchased off from eBay. The MCU's does not seem to be fake as they are functioning properly. I am experiencig the following problem: I want to use external ...
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What are the technical specifications of Tesla “cell level fuses” one fuse per cell

How do Telsa cell level fuses work? Can they protect against short circuits and internal cell fusing? How is the current distributed throughout so many fuses? A total of 200 amps could pass through ...
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Be on the safe side with 12 v battery as powersupply

I have a 12 v battery connected to a LI-PO charger that uses 1.5A. Now i want to make sure i'm not going to fry anything so i want to connect a fuse. Question 1. How do i calculate the value of the ...
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30 views

Fuse header for GPIO pins?

I have recently gained interest in electronics & tinker with Arduino & Raspberry Pi. But I made some big mistakes & ended up frying my board with mains AC supplied to the GPIO :( (yes, I ...
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84 views

Resettable fuses in parallel to limit output current

What are your experiences with this? it is reliable do use PTC smd to limit 15A? the datasheet has a hold value and a trip value. How I choose the values?
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SKM15C-05 which fuse for input and output?

I'm very new to this, but I've ordered an SKM15C-05 documented here: http://www.meanwell.com/search/SKM15/SKM15-SPEC.PDF My plan is to use it to power a small SOC unit via power over Ethernet (POE). ...
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109 views

Time-graded overcurrent protection setting

Source: "Protection of industrial power systems" by T Davies. I am the typical calculation for fuses section, page 92, from chapter 5. There is a calculation were the max overload current of the ...
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Trying to replace a Sun 1/2 amp mini fuse

I am trying to replace a fuse on a board and I'm a novice. The fuse itself is labeled "Sun 1/2 amp" and looks similar to ceramic, although I am not certain of this. It is held to the board by 2 leads. ...