roberthans's articles

We all know that you can drive an LED with nothing more than a voltage source and a series resistor. But this is not the optimal approach. I won’t go into all the details because we already have an article that covers this topic. Here’s the abbreviated version:   Current vs. Voltage The critical parameter […]
  1. Technical
As the name implies, the thermistor (i.e., thermal resistor) is a temperature-sensing device whose resistance is a function of its temperature. Thermistors are available in two types: PTC (positive temperature coefficient) and NTC (negative temperature coefficient). The resistance of a PTC thermistor increases as the temperature increases. In contrast, the resistance of an NTC thermistor […]