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