Utilizing a small pen form factor, this design operates as a hand-held scanner with optical character recognition (OCR). The pen not only captures and stores the characters available for download, but it can also read the words to you via a small built-in speaker. At the heart of this design is the Renesas RL78/G14, an industry-leading lowest power MCU. The MCU interfaces to the image sensor and a micro-SD card as well as controls the volume of the speaker via a digitally controlled potentiometer. Additionally, the pen is powered off of a rechargeable battery, which is charged via the ISL9205 battery charger.
For details on how to build a pen scanner/reader, see the Talking Pen RL78 Quick Solution reference design page.
- Scans with OCR and captures data on a micro-SD card
- Reads captured sentences back via a built-in speaker
- Operates on very low current and enables long battery life
- Small form factor with rechargeable battery via the USB interface
|RL78/G14||Low power consumption, high function general-purpose microcontrollers||RL78/G14 Hardware User's Manual||Select Specific Device|
|ISL9001A||LDO with low supply current, high PSRR||Datasheet||Buy/Sample|
|ISL9205||Li-ion battery charger||Datasheet||Buy/Sample|
|ISL22316||Digitally controlled potentiometer (XDCP) with I2C bus interface||Datasheet||Buy/Sample|
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