An E Ink Makeover for the Classic Film Clapperboard

Technology is changing the world so fast, sometimes it’s enough to make your head spin. Between ultra-high-quality digital cameras, internet-based streaming platforms, and AI, anyone can produce and distribute their own films these days. Of course, this tech can only take you so far — you still need to put in a lot of effort to produce quality content. And you’ll also need the right tools to support these efforts.

One tool that is frequently overlooked is the clapperboard. It may seem simple and outdated, but in reality, it provides vital information to editors during the post-production phase. Not only does it make it possible to quickly locate each scene, but it also provides a cue that helps to perfectly synchronize video with external sources of audio.

However, old-school clapperboards seem out of place in modern filmmaking. Instructables user Gokux was tired of trying to decipher text that was scribbled in marker and decided to build an updated version of this tool. The result is called E-Slate, and it is a digital clapperboard with an easy-to-read E Ink display that can be quickly updated using a companion smartphone app.

Instead of handwritten notes, the device uses a large 7.5-inch monochrome E Ink display to present key production details such as roll, scene, take, director, and date. This not only eliminates smudging and illegibility, but also ensures excellent visibility — even in bright outdoor conditions where traditional LED displays tend to struggle.

Powering the system is a Seeed Studio XIAO ESP32S3 Plus and a XIAO ePaper Display Board, which handle both the display and wireless connectivity. When powered on, the device creates its own Wi-Fi access point, allowing users to connect directly via a phone, tablet, or computer. From there, a built-in web interface makes it easy to update all slate information in real time. Once submitted, the display refreshes instantly, presenting clean, high-contrast text that remains visible without continuous power consumption.

Using Fusion 360, the creator developed an enclosure that houses the display, battery, and electronics efficiently. The unit is 3D printed in multiple parts and assembled with standard hardware, resulting in a lightweight yet durable build. The iconic clapper arm is also present, complete with high-visibility stripes for clear visual cues during filming.

Looking ahead, Gokux is planning to add even more advanced features. With Wi-Fi already integrated, future versions could sync directly with production schedules, spreadsheets, or timecode systems, further streamlining the filmmaking process. Check out the project write-up for more details about how you can make your own videos more professional.