Hi I have a project to complete for my university. I am
designing a PDA controlled vending machine. I have made a program on Labview for the PDA. Now when the user opens the software and stands infront of the vending machine he will scan for vending machines.
whatever he wants he then selects that vending machine. the vending machine will have buttons corresponding to 3 slections. When the user selects the button,the microcontroller in the venidng machine will send a signal to a computer that will also be connected to the
microcontroller. If the person has enough balance the microcontroller
will turn the correspoind motor on so it can vend the item. the motor is
24 VAC. the microcontroller also needs to be connected to a bluetooth
tranceiver. My question is that I am looking for the right
microcontroller that can be able to turn on one of the desired motors. I
will connect each motor to the microcontroller though a relay. could you
please guide me how to od it.
2007-02-23 10:38:28 · 2 answers · asked by UZ 1 in Computers & Internet ➔ Programming & Design
You will need some kind of buffer between the relay and the I/O pin. A couple of resistors and a darlington transistor if it's just one relay or a chip like a ULN2803 has 8 drivers if you have more. Any micro with IO pins will do.
2007-02-23 10:43:41 · answer #1 · answered by steve.c_50 6 · 1⤊ 0⤋
because you've the relay putting apart the motor modern-day from the controller, it really is trivial. in simple terms use a transistor or Darlington junction to strengthen the administration signal to a large sufficient factor to rigidity the relay, and also you're performed.
2016-12-04 20:52:08 · answer #2 · answered by Anonymous · 0⤊ 0⤋