Relay circuitry with self regulating charging

An electronic device comprising:

• a microcontroller configured to receive a first voltage from a regulated power source and output the first voltage via an output pin, wherein the first voltage corresponds to a rating for operating the microcontroller;
• and
• a first switching element configured to:
• receive the first voltage at a first terminal and receive a second voltage from a power supply at a second terminal, wherein the power supply is configured to provide power to the regulated power source;
• and
• selectively charge a storage capacitor coupled to the power supply via the switching element based on a difference between the first voltage and the second voltage;
• and
• a second switching element configured to:
• receive the first voltage from the output pin at a third terminal of the second switching element;
• and
• receive a third voltage at a fourth terminal of the second switching element, wherein the second switching element is configured to selectively output the first voltage to the first terminal based on a second difference between the first voltage and the third voltage.

A system, comprising:

• a microcontroller configured to receive a first voltage from a regulated power source and output the first voltage via an output pin, wherein the regulated power source is configured to receive power from a power source;
• and
• a charge circuit comprising a plurality of switching elements configured to couple the power source to a load, wherein the plurality of switching elements comprises a first switching element, a second switching element, and a third switching element coupled to each other, wherein the first switching element is configured to:
• receive the first voltage at a first terminal of the first switching element via the output pin;
• receive a second voltage at a second terminal of the first switching element, wherein the second voltage corresponds to ground;
• and
• selectively output the second voltage to the second switch based on a first difference between the first voltage and the second voltage wherein the second switching element is configured to:
• receive the second voltage at a third terminal of the second switching element via the first switch;
• receive a third voltage at a fourth terminal of the second switching element via the power source;
• and
• selectively output the first voltage to the third switch based on a second difference between the third voltage and the second voltage;
• and
• wherein the third switching element is configured to:
• receive the first voltage at a fifth terminal of the third switching element via the power source;
• receive the third voltage from the power source at a sixth terminal;
• and
• selectively output the third voltage based on a third difference between the first voltage and the second voltage.