A version of thie article appeared in the February 2012 issue of Test & Measurement World. See the PDF. Many industrial systems use the 4–20-mA loop to transmit measurements from sensors to displays, ...

This application note is a schematic review check list for systems embedding the Atmel® ARM® Thumb®-based AT91RM9200 microcontroller. It gives requirements concerning the different pin connections ...

Without this current limiting resistor, current would flow at levels that are unsafe for the LED, the microcontroller, or both. The circuit schematic Above is the circuit we are using as an example.

This circuit solved a problem encountered in developing a portable device with an ARM Cortex-M0 processor. The power supply consisted of two AA batteries (2 × 1.5 V), and I needed to signal the user ...

[Lujji] is playing around with the STM8 microcontroller. In reviewing the official documentation for this chip, he read the external clock can be a sine wave, a triangle wave, or a square wave with a ...

Microcontroller port pins can typically be driven either high or low, or else be put into an "input" or high-impedance state. This circuit uses the three states to drive two separate LEDs with one ...