lördag 12 januari 2013

Tinker Bell! the wireless dmx fairy


One of my most recent projects is creating a dmx controlled wireless LED. The LED is actually acting as Tinker Bell in the play Peter Pan and Wendy. the play had it´s premier at Stockholms Stadsteater in the middle of december 2012. the idea was to make a small battery powered wireless dmx LED driver. first i had an idea of using a Zigbee solution. but after some thinking I realized that i needed i wireless solution that both I and the technicians at the Theater was familiar with. finally i came up with a design using a wireless DMX module from Lumen Radios OEM series. i Made the LED driver and DMX decoder of a Arduino nano with a max 485 and a mosfet to drive a 3w LED. this was soldered to a PCB also containing a status led and a mode switch for the WDMX card. i made some mistakes along the way one was the choice of the LED was a bit too late and should have been done earlier in the design process. The choice of powersupply circuit and LED driver design was dependent on the choice of the LED. as a result of this the PCB design i came up did not exactly match the final design of the fairy. thats why i will not publish the actual plans here because i had to modify them to work. If some shows any interest i can publish the final modified schematic and arduino code. Theese module was then supplemented with a strobe follow spot that was acting as Tinker bell when she was flying. The final power source was a 10.8 volt RC battery. The original idea was to use a 9volt battery but it run out of juice to fast.

the finished pcb with the wireless dmx module underneath.  The White Cable is part of antenna. As you can see there are some modifications made on the pcb.


a bunch of tinker bell modules ready.

3 kommentarer:

  1. Can you please publish the code and the PCB of this project? That would by great because i am searching exactly for such a description. thank you

    SvaraRadera
    Svar
    1. ok i can start with the code and the schematic because i have that ready. If you want to build a clone of this solution i strongly recommend you to start with a breadboard test because im not sure about witch mosfet i finally used and the value of the resistor connected to it.

      Radera
    2. link to the schematics and code page:

      http://technicaltheaterbackstage.blogspot.se/2013/05/the-tinkerbell-files.html

      Radera