robk
Enlightened
Need help with \"Ohm\'s Law\"
I've been making quite a few ZLT+ boards for use in 2D Mags for buddies of mine. They work great, although they are not terribly efficient - but with D cells, it doesn't really pose a problem. Here's my question: I use a 0.1 ohm / 1% current sense resistor in series with the LED to "tune" each board for about 500mA (or 50.0 mV across the sense resistor). If I read , say, 490 mA, what is the true current when I remove the current sense resistor and package the whole thing up? It's got to be 10 - 50 mA higher, doesn't it? It's becoming more important now, as I am etching the emitter resistor on the board instead of using a thin wire. Thanks for any assistance!
Rob
I've been making quite a few ZLT+ boards for use in 2D Mags for buddies of mine. They work great, although they are not terribly efficient - but with D cells, it doesn't really pose a problem. Here's my question: I use a 0.1 ohm / 1% current sense resistor in series with the LED to "tune" each board for about 500mA (or 50.0 mV across the sense resistor). If I read , say, 490 mA, what is the true current when I remove the current sense resistor and package the whole thing up? It's got to be 10 - 50 mA higher, doesn't it? It's becoming more important now, as I am etching the emitter resistor on the board instead of using a thin wire. Thanks for any assistance!
Rob