ST STEVAL-IHT004V1 AC timer demonstration board on HT triacs ST7Lite1b handbook

About this manual

The STEVAL-IHT004V1 is an evaluation board designed to promote applications where a single AC switch is controlled in on/off full-phase mode. It utilizes through-hole technology for easy modification of the board to suit desired functions.

Three pre-developed application programs are included: a hand dryer with an infrared sensor, a bathroom fan with a humidity sensor, and a multi-entrance room controller using push buttons. The board features capacitive power supply, overvoltage protection pads, and a free development area for breadboard adaptation.

What's inside

• Features
• Demonstration description
• Circuit schematic
• Revision history

Frequently asked questions

What is the purpose of the STEVAL-IHT004V1 demonstration board?

The board promotes applications where a single AC switch is controlled in on/off full-phase mode based on information from a single sensor.

What are the stated power ratings for the board's output and standby consumption?

The average output current is 16 mA, and standby power losses are less than 0.3 W at 230 V.

What modifications can be made to the board for overvoltage protection?

Users can implement protection by adding a varistor between mains voltage or a Transil between TRIAC A2-G terminals.