tho I agree with you Hop ....
lets keep it friendly guys
Okay, I apologize to
@KeithM for the way I responded to his post. Let's get back on track as he suggested and discuss motors and Bluetooth controllers.
Motors first: I have worked on automobiles with power windows. They are a nightmare to get access to the mechanism, which in my experience consists of a geared-down brushed DC motor driving a bell-crank contraption that raises and lowers the window. There is no provision for counter-balancing the weight of the window, which is considerable. There is no obvious way to add a hand-crank to the mechanism (the gear reduction on the motor appears to be a worm gear so the window weight won't apply reverse torque to the motor). It appears to be an add-on that
replaces a conventional hand-cranked window. So. if you want to preserve a hand-crank
and add a motor for powered window movement, some mechanical engineering is required.
First, from a safety point of view, there must be a mechanism that disconnects the hand-crank when the window motor is running. Perhaps a solenoid-operated clutch that disengages the handle while the window motor is running would suffice. Then you have to somehow couple the hand-cranked mechanism to a reversible DC motor, perhaps with one of those spiffy little ladder-chain belts engaging a gear on the hand-crank shaft and another gear on the motor. You may or may not need a worm gear to prevent the weight of the window from applying back-torque to the motor. I think it would be a far easier job to ditch the hand-crank and modifiy a regular power window to accept Bluetooth conveyed commands from the tablet. Just parallel the existing window control switches with some relay contacts controlled by a Bluetooth receiver.
Now let's look at Bluetooth controllers. The typical Bluetooth transmitter is also a receiver for bi-directional communications. The two must be "paired" by the end user before any communications can take place, although it is also possible to establish a Bluetooth network among multiple Bluetooth transceivers. The point here is communications: data, character strings, binary information. The window and mirror motors must connect to a receiver that interprets the commands sent from the tablet via Bluetooth. For this, I think I would start with an Arduino Uno equipped with a Bluetooth shield and a Bluetooth transceiver module, but you are free to come up with whatever hack you think would work.
I would like to hear from
@pengyou with his plan on how he will accomplish the task. Maybe someone here can provide schematics, parts list, and wiring diagrams. Please tell us what make, model, and year your van is and what factory-installed accessories you have.
Hop