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Sub radar from Mike's blue servos
For sometime now I have been using the little blue servos that Mike sells for radar motor / gearboxes for rotating radars of my surface ships. (I'll get the photos in here pronto!)
Was thinking over the w/end about sub radars.
First to make the unit into a slowly rotating motor gear box combo:
The job involves carefully opening the case, disconnecting the pot's wires to the board, disconnecting the motors wires to the board, removing the pot's two little metal limit tabs and the surrounding plastic tabs that the metal tabs stop at, adding some cap supression to the motor terminals and motor case, and putting positive and negative wire on the motor terminals.
Putting the case back together and utilising the gears and indeed the pots axel (which is part of the gear assembly), you then have a tiny unit for the scale rotation of radars. Varying the input voltage from 1.2 to around 4.5 volts creates different levels of slow rotation speed.
Sub radars - an idea
I got to thinking about the small radar scanners that subs have - just watched a Collins class radar working at PD on a video over the w/end.
I was thinking of also the smaller diameter SDs that David is working on and was wondering if some of these SD tubes and end caps could be used to house the little servo and say a AA or AAA battery and a NC reed switch. The idea I have is you would put a rare earth magnet outside the tube adjacent to the reed switch to open the circuit - turning off the switch. Removing the magnet and the circuit is NC and is on. I figured to use a Standard waterproof motor bearing and shaft from a SD. Connect the shaft to the top of the servo head. The only reason why you would need to open the unit is to change the battery. The unit would need just one end cap with o'ring and a valve to let the over-pressure from sealing out.
I'll supply photos of this and some dimensions soon.
J
Was thinking over the w/end about sub radars.
First to make the unit into a slowly rotating motor gear box combo:
The job involves carefully opening the case, disconnecting the pot's wires to the board, disconnecting the motors wires to the board, removing the pot's two little metal limit tabs and the surrounding plastic tabs that the metal tabs stop at, adding some cap supression to the motor terminals and motor case, and putting positive and negative wire on the motor terminals.
Putting the case back together and utilising the gears and indeed the pots axel (which is part of the gear assembly), you then have a tiny unit for the scale rotation of radars. Varying the input voltage from 1.2 to around 4.5 volts creates different levels of slow rotation speed.
Sub radars - an idea
I got to thinking about the small radar scanners that subs have - just watched a Collins class radar working at PD on a video over the w/end.
I was thinking of also the smaller diameter SDs that David is working on and was wondering if some of these SD tubes and end caps could be used to house the little servo and say a AA or AAA battery and a NC reed switch. The idea I have is you would put a rare earth magnet outside the tube adjacent to the reed switch to open the circuit - turning off the switch. Removing the magnet and the circuit is NC and is on. I figured to use a Standard waterproof motor bearing and shaft from a SD. Connect the shaft to the top of the servo head. The only reason why you would need to open the unit is to change the battery. The unit would need just one end cap with o'ring and a valve to let the over-pressure from sealing out.
I'll supply photos of this and some dimensions soon.
J
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