March 12, 2017

Interesting Components

ST makes a device called the "LDF", which is a 1 amp low dropout voltage regulator. Dropout is 500 mV. It has 5 pins. In, Out, Gnd, Enable, and Adjust. It is available in fixed output and adjustable versions.

PCF8574T is an 8 bit i2c expander. PCF8575T is a 16 bit i2c expander. Both are available cheap on Aliexpress

The TL431!! A 3 pin voltage reference chip on every power supply everywhere it seems. Handy to know about and little known. Should be as common knowledge as the 555.
Have any comments? Questions? Drop me a line!

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