UM0277

Kit introduction

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1.2

Board presentation

Figure 2 shows the STEVAL-IHT001V1 board and the main components used on this board.

Figure 2.

Power board (top view)

This board mainly embeds (refer to Appendix C for the complete schematic):

●

A capacitor power supply. The average output current of the capacitor power supply is

approximately 25 mA with he embedded 1µF C3 capacitor (for a 230V-50Hz Line RMS

voltage)

●

A ST7LITE39F2 MCU

●

AC Switches: one ACS102-6TA, one ACS110-7SB2 and one ACST6-7ST to control

respectively a light bulb, a defrost resistor or fan, and a compressor

●

ON/OFF LED. This LED switches ON when the board is powered

●

Temperature order visualization. Three LEDs indicate the temperature order using

three different settings: low, medium and high

●

BP1 Push Button, to change the temperature order setting

●

Transducer (or buzzer) to warn the user if the door is opened for an extended time

●

SCI connector, for communication between the board and a computer (using the GUI

software)

●

An In-Dart connector, to load the firmware in the MCU

Warning:

To avoid electrical shock through the computer, if the In-Dart

connector is used to connect a computer, the STEVAL-

IHT001V1 board must be plugged into an insulated mains

plug.

Temperatureorder

visualization

BP1PushButton

(temperatureselection)

J1connector (ACmains)

ON/OFF

Led

SCI connector

Transducer

ACS/ ACST

Power

supply

capacitor

ST7Lite

MCU

Temperatureorder

visualization

BP1PushButton

(temperatureselection)

J1connector (ACmains)

ON/OFF

Led

SCI connector

Transducer

ACS/ ACST

Power

supply

capacitor

ST7Lite

MCU

J1connector (ACmains)

ON/OFF

Led

SCI connector

Transducer

ACS/ ACST

Power

supply

capacitor

ST7Lite

MCU