Colour Switcher/Fader For Spiro Project

[Doc]

I would use a microcontroller. You have to do some programming, but that's easy. If you want analog modulation you will need to add D/A converters though, as microcontrollers can only do PWM at best.

Would PWM with an "inertia" capacitor, charge and bleed resistors work?

[buffo]

thats all ya need..

Either you've got an R/C drag car, or else you're *seriously* overpowering your stock 1/10th scale motor! Either way, I recognize the Tamaya battery plug! (Never went beyond a 7-cell pack in my RC-10 myself, and even so I managed to burn up 3 speed controllers.)

Adam

[keeperx]

thats not my design, i ripped it off a RC site but mine are similar..
And they are for Boats not cars
http://www.hobby-estore.com/electric...lyingfish.html
http://www.youtube.com/watch?v=pusDxENmp9Q <-- not mine

[lamborgini8]

Motors and rpm controler is on its way, I will look into enclosures once the parts have arrived and see how I can do this.

[lamborgini8]

Ok, been thinking about this...

I will go for the RGB driver, which costs £50 which isn't too bad but I just thought of a small issue... What about the green laser? As far as I know you can only buy greens with drivers already attatched... Can I just remove the driver from that and attatch it to the RGB driver and set it to the same current?

Just a thought if I decided to complicate things even more, is there any way I can have manual control of the colours as well as the 555 timer? I could just put a button switch on each laser and the 555 timer right couldnt I? That way I can select the colours I want and when I want it on auto, just switch all colours on and turn on the 555 timer.

[rog8811]

Can I just remove the driver from that and attatch it to the RGB driver and set it to the same current?

There is no reason why you should not do that, the RGB driver needs to be able to supply a minimum of 250ma for the green even if you are only using 5mw so check the total current draw for all three lasers to be sure.

Regards rog8811

[heroic]

Would PWM with an "inertia" capacitor, charge and bleed resistors work?

Yes.

Colour cycling is about six lines of C code for an Atmel ATtiny processor. You could even use one of the mini-Arduinos and have the whole show controllable via USB. That way you could even control the motors with the colours. DMX512 is even possible on the Atmel USART.

[lamborgini8]

Right, I now have my motors and RPM controller and it is becoming apparent that the pocket size is out of the window because of the amount I want it to do...

I am moving towards the mains powered side now as I can just use a 12V PSU and everything can be wired to that with no worry about batteries running down.

[shrad]

why not use mobile phone vibrators instead of motors? it's pretty easy to remove the load and have a 800rpm tiny 1.5v motor

[lamborgini8]

why not use mobile phone vibrators instead of motors? it's pretty easy to remove the load and have a 800rpm tiny 1.5v motor

Because I already have three 12V 90mm fans wired up to a RPM controller.