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Archive for the ‘servos’ Category

Jun
14

A scary project: diy animatronic eyes

animatronics, arduino, diy, servos, tutorial Comments Off on A scary project: diy animatronic eyes 

animatronic eyes

Thanks to Lance who created a project on Instructables,  you’ll be able to create remote-controlled eyes using Arduino Uno, two servos, some plexiglass and a couple of doll’s eyes.

If you like animatronics,  watch the video below: the result is pretty scary!
 

 
 

New Yellow Boat 3 Jet pump

Yellow Boat Maiden


First Yellow Boat failures ESC's died in both boats  very high ambient today over 31°C , at the lake, burned out FET's after all the surfing at Sumner I'm surprised after all the reliable running, still we live and learn air cooled in a closed space like the hull was a bit too good to be true.

Fitted 50 Amp water cooled ESC, which is a marinized aero ESC to Henry's boat, as the HK 50A boat ESC's don't seem that great, lots of motor noise and heating, regardless of settings it seems.

Changes:
Replaced faulty servo with metal gear type
New improvedWater cooled ESC
Water cooling for motor
Water cooling pump

Thrust vectoring modification


Thrust vectoring in action


Thrust vectoring trim tab

Archimedes screw type pump and cooling system for motor.

 Flexible coupling for thrust vectoring servo push rod.

ESC installed aft as the boat trims very bows down note the water cooling, water is pumped and scooped (when moving) from under the boat, and flows through the motor then the ESC and out of the transom so you can see that it is working.

Cooling pump switch, always turn on before launch, it takes a while to prime usually after a bit of forward motion you should see a flow from the outlet. Forward motion will also generate flow but the pump will stop over heating when you stop so you can stop and start as much as you like.
Radio is mounted to avoid water. Both servos are Turnigy 180 degree metal gear type

New Parts

H-KING 50A Fixed Wing Brushless Speed Controller
Turnigy TGY-R5180MG 180 Degree Metal Gear Analog Servo
ESC
Amp rating: 50A
Burst Rate (15sec): 55ABEC Current: 2A, 5V (Linear)
Voltage: (2-4 cell Lipo)
I added two Aluminium cooling tubes boned to its heat sink





Weight: 12g
Size: 23.2mmx12.0mmx21.6mm
Torque: 2.0kg.cm (6.0v)
Speed: 0.12sec/60deg (4.8v) - 0.10 sec/60deg (6.0v)
Voltage: 4.8-6.0vType: Analog MicroGear Train: Metal
Ball Bearing: NoLead Length: 180mm
Plug: JR/Futaba





The water pump showing the motor out on an old servo left, and the intake scoop, you can see the end of the screw


The pump used an ancient Greek idea the Archimedes' screw


This is the screw I used its for GIB board 
Principal of operation
















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