Skip to content
All prices US$ - All orders receive free delivery, worldwide - Click here to learn more
All prices US$ - All orders receive free delivery, worldwide - Touch here to learn more
A Configurable Op Amp Lab on a PCB

A Configurable Op Amp Lab on a PCB

from hackster.io

As outlined here, Microchip’s AVR DB family of chips contain a very interesting feature: three configurable op amps. These can be used separately, or linked together for advanced signal conditioning, which would be an exciting possibility for reducing a project’s BOM size. To experiment with it, David Johnson-Davies of Technoblogy came up with the Pocket Op Amp Lab earlier this year.



This device was originally constructed on a breadboard, based on an AVR128DB28 microcontroller. Its user interface consists of an Adafruit 240x135 color TFT display and four pushbuttons, which are routed to the processor itself. A variety of setup options are available, which dynamically update as you manipulate them. You could, for example, change an amplifier’s gain, and hear the effects in real-time.

Johnson-Davies also recently published a Pocket Op Amp Lab Cookbook to show what you can do with the gadget, and has now transferred it to a PCB version for an easy, portable, and self-contained tool. This board features a new user-defined button, and there are six op amp IO, as well as ground and VDD pins broken out and ready to use. To hold the display, there’s a clever offset arrangement of pins to keep it in place, or you can solder it on for a permanent solution.

In whatever format you choose, this system looks like a great way to experiment with the AVR DB series from Microchip — and op amps in general!

Finally - to keep up to date with interesting news, offers and new products - interact with us on facebookinstagram, and twitter.

Previous article This Rotary Cellphone Also Features a Flexible E Ink Display
Next article How One Maker Built an Ultra Low-Power Arduino Pro Mini

Leave a comment

Comments must be approved before appearing

* Required fields