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Build a simple Arduino-based DCC system

This article will help you build a simple Arduino-based DCC system. Growing up in the 1980s I was living the dream. I had an ...
EDN

Analog voltage controls digital potentiometer

This Design Idea describes an analog voltage that controls a digital potentiometer through the device’s I 2 C interface. An ADC in the Microchip PIC12F683 microcontroller converts the analog voltage ...
Electronic Design

Create A 250-MHz Bandwidth Digital Potentiometer For Video Level Control

A circuit used to control the level of a video signal should have a 3-dB cutoff frequency of greater than 5 MHz for a television application or 100 MHz for a monitor application. CMOS-based digital ...
Ars Technica

Dimming LED strips

I'm trying to dim LED strips, approximately 30ft in length, with hand controls. I've found that regular potentiometers (those sold by Adafruit) max out at about 0.2 W. For whatever reason, the Red ...
EDN

Use a photoelectric-FET optocoupler as a linear voltage-controlled potentiometer

You can use a photoelectric FET as a variable resistor or a potentiometer in combination with a fixed resistor. The H11F3M photoelectric FET has an isolation voltage of 7.5 kV, enabling you to safely ...