Re: Who Has Used Resistors as Fuses
On Jun 24, 1:18 pm, D from BC <myrealaddr...@xxxxxxxxx> wrote:
Sometimes I burn too many regular fuses with prototypes.
Could I use a resistor ?
I was blowing 2amp fast blow pico fuses.
Yes, picofuses are pricey and a fusible resistor is cheaper
and works about the same. PTC is the fancy way to go, but
you can also use... a light bulb. A simple 200W@120V light
bulb will limit the current to 2A when your board shorts out,
and the cold resistance is relatively low (about 120 ohms)
so will permit normal operation at low currents.
It's a property of pure metals that they are ALL positive-tempco
resistors. Tungsten filaments included.
.
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