Lately we have seen the advancement of technology and the possibilities it offers us. With this, we see services that were previously done exclusively by people now being performed by equipment and machines. This occurs with the aim of making people's lives easier and offering better working conditions, more efficiency and agility, reducing the amount of human errors in the process.

The project in question is proposed to be an ultra-compact timer capable of activating resistive or inductive loads satisfactorily, occupying the smallest possible space and, mainly, at a low cost.

The timer circuit

MCU:

The timer uses a STM8S003F3U6 microcontroller, one of the smallest and cheapest on the market. It is well known for its wide range of products available today.

Source code:

The STM8 development tool is available free of charge. ST Visual Develop or even the Arduino IDE platform can be used. For greater accessibility, the code provided for the timer was created in the Arduino IDE.

Operating times can be freely modified according to the code used.

Load drive:

The load drive driver used was a triac driver due to its low price and little space used, allowing the manufacture of the board with reduced dimensions.

noise reduction:

A snubber circuit was used to reduce the EMI interference generated by switching the inductive load, if one is used. The snubber's R and C values may need to be modified depending on the payload used.