Controlling servo motor with AVR

Servo motor

Servo motors are a type of electromechanical actuators that do not rotate continuously like DC/AC motors. They used to position and hold some object. They are used where continuous rotation is not required, so they are not used to drive wheels. In contrast, they are used where something is needed to move to a particular position and then stopped and held there. The most common use is to position the rudder of aircraft and boats etc. Servos can be used effectively here because the rudders do not need to move full 360 degrees nor they require continuous rotation like a wheel. Servos are DC motors with built in gearing and feedback control loop circuitry. Most servo motors can rotate about 90 to 180 degrees. Some rotate through a full 360 degrees or… Continue reading

Mixer of two servo signals for V-Tailed airplanes

This is nice tiny project that RC hobbyist may find useful. Mixer takes teo servo control signals and provides the sum and differential on two output channels. It can be used to control two servos of V tailed airplane or any other vehicle which has differential driving system.   V-Tail mixer uses Attiny13 AVR microcontroller and just few elements. So it is lightweight that makes it ideal for modeling. It’s other features are: Compatible with standard servo pulses (1ms…2ms); High 1200points resolution; Two Futaba standard servo input and output connectors; Selectable Fail-safe function (middle servo position or no output servo pulse); Small size: 40mm x 15mm x 6mm; Assembly source code is available for download and compile. Continue reading