Microchip Technology Digital Thermometer

Microchip Technology Digital Thermometer Reference Design demonstrates the implementation of a BLUETOOTH® connected digital thermometer using the PIC16F1519 Microcontroller (MCU) and RN42 Bluetooth Module. The PIC16F1519 MCU is an eXtreme Low Power (XLP), cost-effective 8-bit microcontroller with an integrated capacitive touch sensing module. Connectivity is demonstrated on this board by the use of the Microchip fully qualified RN42 Bluetooth 2.1 + EDR Module. This demo design can also be easily implemented using any of Microchip's Bluetooth Low Energy or Wi-Fi® connectivity modules.

Features

PIC16F1519 MCU
- XLP (eXtreme Low Power) technology
- mTouch^® integrated capacitive touch sensing module
- 28-channel 10-bit Analog-to-Digital Converter (ADC)
- Fixed voltage reference with selectable voltage level outputs
- Several packages available, including a small Ultra-Thin QFN (UQFN) package
RN42 Bluetooth Module
- Fully certified Bluetooth 2.1 + EDR module offers rapid time to market for connected designs
- On-board embedded Bluetooth stack (no host processor required)
- Supports Bluetooth data link to iPhone/iPad/iPod Touch
- UART local and over-the-air RF configuration
- Secure communications, 128-bit encryption
- Small form factor
- Programmable low-power modes
- Bluetooth SIG qualified

Reference Design
- Measures temperature in Fahrenheit or Celsius
- Buttons implemented using mTouch integrated capacitive touch technology
- OLED display is used to demonstrate stand-alone design capability
- Bluetooth module is used to demonstrate smartphone/tablet connected design capability
- Low overall BOM cost due to function integration
- Low-power operation utilizing Microchip's XLP PIC16F1519 MCU
- Powered by two AAAA batteries

Videos

Block Diagram

Development Made Easy

Start with the free download of the schematics and source code that can easily be modified to your specific application needs. This reference design helps to develop a low-cost digital thermometer that can be handheld or integrated into a wearable device.

Digital Thermometer Schematics

*Microchip medical reference designs and demos are intended for evaluation and development purposes only. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify, and hold harmless Microchip from any and all damages, claims, suits, and expenses resulting from such use.