The terminal block is really pretty clever. It gives you the ability to connect any number of fans all at different voltages....so whatever voltage a fan seems to prefer, it's on a terminal somewhere.BrianE wrote:Cool, glad to know it really works! I like the cheapness and simplicity of this... maybe I should build one of these things too.
Did Diodes Die?
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sundevil_1997
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Ghetto wiring jobs? Boy, that brings back memories of splicing together mixed sections of telephone wire just so I could get Internet access when I was a kid... Internet was new and didn't need a perfectly noise-free connection at the time.
Until I got a decent wire stripper, I used a pocket knife, or my teeth. So long as you don't nick the wire, you're golden. Wrap the end result in electical tape, or just use wire connectors.
Until I got a decent wire stripper, I used a pocket knife, or my teeth. So long as you don't nick the wire, you're golden. Wrap the end result in electical tape, or just use wire connectors.
It's a common misconception that diodes always drop 0.7v each. It's a very rough rule of thumb and it depends on the diode and the amount of current you are pulling through it.
The voltage drop of a diode depends on the type of diode and the current density through it. It is a logarithmic relationship though, unlike a resistor. A typical 1N400x series diode may drop less than 0.5 volts at a few milliamps, rising to 0.8+ at an amp. If the current through the diode is low, the voltage drop will be low.
The voltage drop of a diode depends on the type of diode and the current density through it. It is a logarithmic relationship though, unlike a resistor. A typical 1N400x series diode may drop less than 0.5 volts at a few milliamps, rising to 0.8+ at an amp. If the current through the diode is low, the voltage drop will be low.
There is such a thing as a nonlinear resistor....ferdb wrote:It's a common misconception that diodes always drop 0.7v each. It's a very rough rule of thumb and it depends on the diode and the amount of current you are pulling through it.
The voltage drop of a diode depends on the type of diode and the current density through it. It is a logarithmic relationship though, unlike a resistor. A typical 1N400x series diode may drop less than 0.5 volts at a few milliamps, rising to 0.8+ at an amp. If the current through the diode is low, the voltage drop will be low.
Anyway though, I agree, diodes don't always drop 0.7V, at low currents they drop less, and at negative currents they even allow some current though... Not much but it's there. When you get to the breakdown though, all bets are off.
We're veering slowly into off-topicness, but I've hurt my teeth trying to strip wires that way. But I STILL carry around a knife to cut through multiple conductor wire.Mar. wrote:Until I got a decent wire stripper, I used a pocket knife, or my teeth. So long as you don't nick the wire, you're golden. Wrap the end result in electical tape, or just use wire connectors.
I'm not even certain on what you're supposed to used to remove the outer sheath for larger bundles.
A knife works fine.sthayashi wrote:We're veering slowly into off-topicness, but I've hurt my teeth trying to strip wires that way. But I STILL carry around a knife to cut through multiple conductor wire.Mar. wrote:Until I got a decent wire stripper, I used a pocket knife, or my teeth. So long as you don't nick the wire, you're golden. Wrap the end result in electical tape, or just use wire connectors.
I'm not even certain on what you're supposed to used to remove the outer sheath for larger bundles.