#604 Mini Linear Servos
Testing some mini/micro linear servo motors with an ATtiny85.
Most common servos are of the rotary kind. Linear servos are a little more rare and tend to be a bit more expensive but they do have some advantages, such as generally more compact design.
In this project note, I’ll be putting a few mini/micro linear servos through some basic tests.
Here’s the basic setup. By default I have the ATtiny85 flashed for 8MHz internal clock, and I’m using PB4 (pin 3 on the DIP8 ATTiny85) as the servo control pin.
1.5g Micro Linear Servo GS-1502
These GS-1502 servos were from a seller on shopee.sg, and come in a matched left/right handed pair.
|Weight||1.8g(include connector wire)|
|Speed||0.11 sec @3.7v|
|Torque||29.5g of force|
|Dimensions||21 x 15 x 12mm (LWH)|
|Application||Ultra Micro aircraft|
This serve works very well. I had to adjust the minimum pulse width to 832µs
with the command
myServo.setMinimumPulse(832); to allow a full range potisioning from 0˚ to 180˚.
With the 540µs default setting, the servo would automatically return to “home” (180˚) whenever positioned below 27˚.
Here’s a quick demo..