Microcontroller Based Digital Toggle Switch

Here is an ultra-simple circuit of a microcontroller-based digital toggle switch, wired around the inexpensive PIC microcontroller PIC12F675

Kumar

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Description

The finished circuit can be used as an add-on module in any microcontroller project or can be used as an independent toggle switch module, ready to be controlled by a momentary push-button switch (S1). A logic-low (L) level input from an external uC/digital circuit at the SW_IN terminal will toggle the circuit.

Details

The whole electronic circuit works off a regulated 5V DC supply.

This project will draw your attention to the tiny microcontroller PIC12F675 from Microchip. What are the features of this chip, available in traditional (PDIP) and SMD (SOIC) packages?

Only 8 pins, total 6 I/O ports
Integrated Memory-Clear (MCLR) into one of the I/O ports
Its own internal RC oscillator
Operates from 2.0 to 5.5 Volts
Built-in Analog Comparator and Analog-to-Digital Converter (ADC)
Includes two timers, one 8 bit and one 16 bit

This is the tested schematic diagram of the toggle switch. Ready-to-use hex code is also included to expedite the construction process. However, due to commercial reasons, source code of this little project is not published here at this time.