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Showing posts from February, 2024

A Modern Reincarination of Graphire: WACOM Bamboo Series Drawing Tablet Reverse Engineering

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This is going to be a short follow-up of the previous article; please read that one before proceeding:   https://www.lithcore.cn/2024/02/wacom-et-0405-reverse-engineering.html . Same as before, all the high-resolution PCB scans have been uploaded to GDrive:  https://drive.google.com/drive/folders/1vGHHMH9WkavLYoCPT2HWrooUTZOjV1wc I'm personally attached to the Bamboo product line because that is where I got started 10 years ago. The Bamboo product line is initially made of cheap pen-tablet products designed for the entry-level market. WACOM intentionally limited the performance of those products to avoid direct competition with their professional Intuos product line.  Interestingly, by the time I started using their products, WACOM had gradually shifted the focus of this product line to experimental and high-diversity products, including mobile phone styluses, ultrasonic pens (The first Bamboo Inkling product), mobile phone applications, and paper-based products (e.g...

WACOM Graphire Drawing Tablet Reverse Engineering

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 WACOM ET-0405 is one of the few non-ASIC-based tablets released by WACOM, meaning that their RF receiving signal chain is built with discrete opamps and passives. The pen still has an ASIC. This post contains enough information for you to make your own.