would Python work for the pulses? I know the speed of pulses can vary with python but in terms of amounts of pulses, is that possible to code reliably?kbfirebreather wrote:You could get a motor with encoder to be able to position it how you want. Or you could try a motor without an encoder and knowing how much it turns with each pulse, you could calculate/experiment to figure out how many pulses will raise/lower your blinds.
The pulley system and motor seems a good idea, but i'd like to use the Pi as the controller purely for the experience of doing it through that, for the day when maybe I could control the entire room with it.Ravenous wrote:The beaded string thing that angles the blinds could be run between two rubber pulleys. With the right diameter pulley, slightly less than one turn would go between open and closed. Then a gear motor and two limit switches (to stop it going too far) might do the trick.
Alternatively, you could just use the motor and pulleys - no controller. Just put two switches (on/off and reversing) in a convenient place you can reach.
I suppose the messy bit is building the mechanical thingie with the pulleys and screwing it to a wall. (Or make it heavy and sit it on the windowsill????)
I'll definitely look into the limit switch idea, not quite sure what they are but the internet is a beautiful thingCancelor wrote:Two other possibilities ...... have a couple of limit switches, one that activates when the blinds are up and the when they are down.
or ... just let the motor stall when it gets to the end.
Cancelor wrote:I just used google to see what you would get ... some are well expensive!!! .... I meant one like this https://www.egr.msu.edu/eceshop/Parts_I ... switch.jpg Maplin or RS do them.
I'm thinking of a switch that gets activated when something presses against it i.e. the blind gets to the top, pushed against it and closes a switch that in turn sends a signal to the RPi to stop the motor.
Hisiltuz wrote:Hey all,
I have had great success with this forum so far on all my projects, and it occurred to me today that my Pi could control the blinds in my workshop,
thanks a lot guys!