VMA324
V. 01 – 13/03/2018
3
©Velleman nv
5.
Overview
VMA324
The VMA324 (DS18B20) digital thermometer provides 9 to 12-bit (configurable) temperature readings, which
indicate the temperature of the device.
DS18B20 specs: unique 1-wire interface requires only one port pin for communication
multi-drop capability simplifies distributed temperature sensing applications
requires no external components
can be powered from data line, power supply range is 3.0 V to 5.5 V
zero standby power required
measures temperatures from -55 °C to +125 °C (-67 °F to +257 °F)
± 0.5 °C accuracy from -10 °C to +85 °C
thermometer resolution is programmable from 9 to 12 bits
converts 12-bit temperature to digital word in 750 ms (max.)
user-definable, non-volatile temperature alarm settings
alarm search command identifies and addresses devices whose temperature is outside of programmed
limits (temperature alarm condition)
3-wire adaptor for Arduino
®
included
dimensions stainless steel tube:
diameter: 6 mm
length: 30 mm
dimensions cable:
diameter: 4 mm
length: 36" (91 cm)
connections:
red: 3-5 V
black: ground
yellow: data
6.
Example
Connect the VMA324 to your microcontroller board as follows:
VMA324
VMA100
V
5 V
G
GND
S
D2
Download VMA324.zip from the product page on
. The zip file includes the Dallas and OneWire
libraries. Extract this file to a dedicated location on your computer.
Start the Arduino
®
IDE and add both libraries to your IDE.
Now, go to Files
Examples and scroll down to DallasTemperature. Open VMA324_example (see below).
Compile and send the code to your microcontroller.
