Team Eventorizon: Build Diary

[blazerbotics]

Maplin do grommets in packs of 10. I would say you need an LED on the weapon side as well if they're 2 independent systems.

[Eventorizon]

Maplin do grommets in packs of 10. I would say you need an LED on the weapon side as well if they're 2 independent systems.

Thanks Alan! I will see what they have.

As for the LED on the weapon side, How do other people add an LED to a 42V system. Conker 3 will be even higher at 50.4V! Every resistor I have tried has burn out either immediately or after a couple of minutes.

[razerdave]

Alex: 2, 24v LED's wired in series?

Calum: I agree there should be at least some manner of hazard, the arena does favour spinners a bit heavily ATM.

[Eventorizon]

Alex: 2, 24v LED's wired in series?

Its been so long since I did electronics... I forgot all about that. But wouldn't the first LED in the system just get burn out?

[Ellis]

but
http://www.ebay.co.uk/sch/i.html?_tr...at=0&_from=R40

[overkill]

I use a regulator like this to run a LED off a high voltage pack: http://uk.rs-online.com/web/p/switch...ators/7398297/. Just add a small dropping resistor and maybe a capacitor on the output side. I think Recom makes a 1/2 amp regulator in a smaller pack.

[Eventorizon]

I use a regulator like this to run a LED off a high voltage pack: http://uk.rs-online.com/web/p/switch...ators/7398297/. Just add a small dropping resistor and maybe a capacitor on the output side. I think Recom makes a 1/2 amp regulator in a smaller pack.

Looks like that will work for Binky, since she max's at 42V. C3 may need a 2 stage reduction to get to the necessary 12V: One regulator then a resistor.

[overkill]

Over 42 volts? Why not go straight to a Mr Fusion battery! . Recom do another series up to 72V; search for R-78HB3.3-0.5

[Eventorizon]

Over 42 volts? Why not go straight to a Mr Fusion battery! . Recom do another series up to 72V; search for R-78HB3.3-0.5

I found them Thanks for the heads up. Its much easier to do these things when you know what is out there.

EDIT: Typical... they are out of stock

[Eventorizon]

Ok, the current solution is this...

One of these in each robot so I have a 15V output from the weapon system...
http://uk.rs-online.com/web/p/switch...ators/0416846/
...then an in-line resistor to bring the voltage down to 12V.

Since I need 260mA of power to drive the LED's in Conker 3 I need a 12Ohm 2W resistor (15V Source Voltage, 12V LED Drop and 260mA current required to power all the LED's).

In Binky I will need 120mA of power so I will need a 27ohm 1W resistor (15V Source Voltage, 12V LED Drop and 120mA current required to power all the LED's)

Can anyone see an issue with that plan?