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Pen scanner - reader (OCR)

Optical character recognition with download and speech

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. The heart of this design is the 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 a rechargeable battery, which is charged via the ISL9205 battery charger.

Key features:

  • Scans with OCR and captures data on 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


man and woman with tablet, pen and notepad

Recommended products

Products Description Documents
RL78/G14 Low power consumption, high function general-purpose microcontrollers User's manual
ISL9001A LDO with low supply current, high PSRR Datasheet
Battery Charger    
ISL9205 Li-ion battery charger Datasheet
ISL22316 Digitally controlled potentiometer (XDCP) with I2C  bus interface Datasheet


Block diagram

block diagram

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