Recent content by StkMtd

no need to add board to pcb. PCB = Printed Circuit Board. Do you have a soldering iron and a multimeter to do this work? If you had some pictures of the board, that might help as well (so we can see what's going on) Also, If you could get the layout of the LEDs and resistor, a voltage reading...

After reading that 3 times, I still have no idea what you're doing. Since you are measuring temperature, would it be safe to assume you're using some kind of microcontroller? Do you have a schematic? A set of instructions you're following? You'll get much more help if you give people...

RESISTOR_VALUE = (SUPPLY_VOLTAGE - (V_f * NUM_LEDS)) / LED_CURRENT The thing with LEDs is they have very little internal resistance (unlike a tungsten filament). If you hook one up without a resistor, small changes in voltage will create much larger changes in current, and this is what kills...

Completely by myself. I'm quite used to getting questions like this. Yes. I'm trying to see where we don't agree. You have put it in a slightly larger number of words. I'd be interested in an explanation of how that site "makes statements that defy conservation of energy, fields, and...

This is actually quite helpful. I'd have an easier time understanding if I had a scope laying around, but I'll work through this tomorrow when my mind has had some time to recover. Cheers.

The simplest explanation of differences between the two are as follows: NPN - voltage from Base to Emitter causes a proportional voltage (larger) from Collecter to Emitter PNP - voltage from Base to Emitter causes an inversely proportional voltage (smaller) from Collecter to Emitter In full...

First post, after tinkering with electronics so long I just had to join a physics oriented forum. I'm trying to work out how I can get an input voltage to "clip" at a certain level. I start by imagining an ideal diode (no current on reverse bias, infinite current on forward bias). My setup...