Jun82018 Episode 169 – Drum sander controller without a display Posted on June 8, 2018 by The Woodpecker Episode 169 – Drum sander controller without a display I’ve been using the drum sander speed controller I’ve showed you last week, for a while now. So long, that I had time to upgrade it. Now, it can even be controlled without any LCD display. Here’s the result. if you’re interested in having more informations on the programming and the circuitry you can follow this link.