I recently ordered a pair of U2F authentication keys from Amazon. I was very excited about my move to nearly unbreakable security on Gmail, Dropbox, Github, and other services. Individuals and businesses should be flocking to U2F and similar technologies to secure their data and prevent embarrassing and costly security breaches.
October 2017 Archive
ADC Signal Conditioning
Analog signals typically are not ADC friendly, but they can be with some relatively simple circuitry such as a low pass filter and amplifier. The goal is to have the analog signal cover the entire range of the ADC. For example, if your input goes from 0V to 1V and your ADC measures from 0V to 3V, you will need to amplify the input to take full advantage of the ADC. Voltage scaling seems easy enough but you also need to make sure the frequencies you are measuring are low enough for your sample rate which is where filtering comes in.
Analyzing Op Amps
Operational amplifiers, or op-amps as they are affectionately known, are very useful when designing embedded systems and relatively easy-to-use. If you know just a few of the basics, you can design and analyze op-amps like a boss.