Electronic Experiments: Multi-function Shield

Sunday, January 13, 2019

Multi-function Shield

The Multi-function Shield (HCARDU0085) designed for Arduino Uno / Leonardo board has a large range of features which makes it ideal for experiments, learning and advanced projects development.

Besides the feature rich range of components fitted to the shield, there are also a range of expansion headers for convenient interfacing of external modules and components. The shield includes R3 type headers for easy connection to Arduino boards.

Note:

This shield includes a header for attaching an IR reciver (U4-IR-2). The pinout order is not suitable for directly connecting a SFH506-38. However the order is compatible with 1838B Infrared IR receiver (HCSENS0014).

Please always check the schematic before connecting external components.

Features

An LED display module (four-digit, seven-segment)
Two serial LED display driver ICs(74HC595)
Four LEDs
A multi-turn trimpot (10KOhm)
Three pushbuttons
A piezo-buzzer
A port for DS18B20 temperature sensor
A port for TSOP1838 infrared receiver module
A APC220 wireless module interface (serial/UART interface)
A reset button

Pin Layout

Serial LED display driver (74HC595) - Latch 4, Clock 7, Data 8
Four LEDs - Pin 10,11,12,13
Trimpot (10KOhm)-Pin A0
Three pushbuttons - Pin A1,A2,A3
Piezo-buzzer - Pin 3 (digital on/off)
DS18B20/LM35 temperature sensor - Pin A4
Infrared receiver module (remote control) - Pin 2
Header for APC220 shield - Gnd, 5V , 0, 1 (rx/tx)
Reset pushbutton - Gnd
Free pins header (PWM) - 5, 6, 9, A5

Circuit diagram

Looking at the schematic, it looks like using the DS18B20 temperature sensor (and the infrared receiver module) requires a bit of research. As indicated in the top silkscreen layout, the flat (labeled) side of the temperature sensor must face the bottom side of the Multi-function shield fronting the three pushbuttons. Also, the legend “U5-18b20-LM35-A4” has an arrow pointing up toward the middle pin (A4) of the temperature sensor header (GND on the left, DQ in the middle, and 5 V on the right). The jumper J1 feeds 5 V to the middle pin DQ through a 10K resistor (pull-up configuration). Similarly, pin notation for the infrared receiver module is OUT (D2) - GND - 5V.