• COMPLEX PROGRAMMABLE LOGIC DEVICE (CPLD) MODULE

      COMPLEX PROGRAMMABLE LOGIC DEVICE (CPLD) MODULE

      A Complex Programmable Logic Device (CPLD) is a cool piece of hardware to have in your repertoire and it can be used to learn logic or a high level design language or replace obsolete functions or chips. But a CPLD needs a little bit of support infrastructure to become usable, and that’s what I’ll beRead More »
    • WE ASSUME CONTROL: SPI AND A DIGITAL POTENTIOMETER

      WE ASSUME CONTROL: SPI AND A DIGITAL POTENTIOMETER

      In the last video I demonstrated a Universal Active Filter that I could adjust with a dual-gang potentiometer, here I replace the potentiometer with a processor controlled solid-state potentiometer. For those that are too young to remember, we used to say “solid-state” to differentiate between that and something that used vacuum tubes… mostly we meantRead More »
    • HOW TO BUILD A THERMOCOUPLE AMPLIFIER

      HOW TO BUILD A THERMOCOUPLE AMPLIFIER

      A Thermocouple is a terrific way to measure temperature. The effects of temperature change on dissimilar metals produces a measurable voltage. But to make that measurement you need an amplifier circuit designed for the thermocouple being used. Linear Technology LTC 1049 Low Power Zero-Drift Operational Amplifier with Internal Capacitors While researching “Zero Drift Amplifiers” asRead More »