AVT5638 A + - a miniature reminder. PCB and programmed layout

Description

This small device has been designed, above all, for diabetic care, but you can find a much wider range of applications for it. Its task is to signal the passage of a previously set time interval, measured from pressing a button. In this way, it is possible to remind about the need to measure the level of glucose in the blood after some time from the meal, or to look into the boiler room after some time from firing in the oven.

Project AVT 5638 EP 08/18

properties

• Power from a 3V lithium battery
• Power consumption: in standby mode 0.5 mA, in the active state 8 mA, in the alarm state 7 mA
• Measuring one of 4 predefined times: 15 minutes, 30 minutes, 1 hour, 2 hours
• Timing triggered by the button
• Time set by the DIP-SWITCH switch
• ATtiny12A microcontroller, software in C language

Included

• PCB board and programmed layout