This coin-sized circuit will let you activate a servomotor by just pressing a button. You can open a lock, move a puppet, release a thread, slowly open a box lid, or anything you want! This is an example:

The circuit will allow this configurations:

• Initial and final position for the servo arm
• Speed of movement
• 3 working modes
• Energy Save option.

This are the 3 working modes available:

• Momentary: while you keep pressing the button, the servo will move. Once you release the button, the servo will return to the initial position.
• Toggle: every time you press the button, the servo will toggle between 2 positions.
• Latch: you use the first button to move the servo to position 1, and the other button to move the servo to position 2.

It includes a LED light to show when it's on and connection terminals to fasten the cables without welding.

The circuit works between 3V and 5V. The servo works thanks to the circuit, so you must check the voltage is the same for your servo and electric circuit. This circuit is ideal for small and medium servos. Servos with a strong movement and high voltage might damage your circuit.