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I think we got close to answering this, but just to clarify... if I used an incandescent bulb (5V, 60ma) and photocell for this transfer but then an LED and a photocell on the next action to count for the light triggered action, would I have issue with the judges not thinking they're unique?

David

People keep claiming that transfers need to be unique, but I cant seem to find that in the rules. One part cannot be used for more than one transfer, but I cant see why that means two transfers have to be unique if they fulfill the requirements for both tasks. Is there a rule I am missing?

So, based on that logic, I'd say your method would work, David.

davecutting wrote:I think we got close to answering this, but just to clarify... if I used an incandescent bulb (5V, 60ma) and photocell for this transfer but then an LED and a photocell on the next action to count for the light triggered action, would I have issue with the judges not thinking they're unique?

David

At sylvania NW the LED action was considered unique from the incandescent bulb action. There is a clause in the rules stating that each (scorable?) action must be unique.

Would it be okay if we used a small bulb? I want to power my bulb with my saltwater circuit, so I don’t have a lot to work with. As long as it releases a little heat, do you guys think it would be okay? It would be bigger than an LED, but not bigger than 5V.

Are we allowed to cover the photocell completely so long as it still starts the next action? I wanted to start my final action by using a lightbulb to initiate a light activated sound module to play then end, but the accompanying photocell is activated by almost any ambient light, so I coulda use black tape and tape the photocell to my lightbulb. Would that be allowed?

Ash123 wrote:Are we allowed to cover the photocell completely so long as it still starts the next action? I wanted to start my final action by using a lightbulb to initiate a light activated sound module to play then end, but the accompanying photocell is activated by almost any ambient light, so I coulda use black tape and tape the photocell to my lightbulb. Would that be allowed?

Mine is completely enclosed to prevent ambient light from triggering the photocell. Just have a way for the ES to see it.

ScottMaurer19 wrote:

Ash123 wrote:Are we allowed to cover the photocell completely so long as it still starts the next action? I wanted to start my final action by using a lightbulb to initiate a light activated sound module to play then end, but the accompanying photocell is activated by almost any ambient light, so I coulda use black tape and tape the photocell to my lightbulb. Would that be allowed?

Mine is completely enclosed to prevent ambient light from triggering the photocell. Just have a way for the ES to see it.

I've got my photocell in a voltage divider connected to an Attiny25 on my control board. Might want to see if that's possible in your case, then you can just tell it to take an initial reading and then look for a change of greater than a threshold.

davecutting wrote:

ScottMaurer19 wrote:

Ash123 wrote:Are we allowed to cover the photocell completely so long as it still starts the next action? I wanted to start my final action by using a lightbulb to initiate a light activated sound module to play then end, but the accompanying photocell is activated by almost any ambient light, so I coulda use black tape and tape the photocell to my lightbulb. Would that be allowed?

Mine is completely enclosed to prevent ambient light from triggering the photocell. Just have a way for the ES to see it.

I've got my photocell in a voltage divider connected to an Attiny25 on my control board. Might want to see if that's possible in your case, then you can just tell it to take an initial reading and then look for a change of greater than a threshold.

Yeah, I'm sensing mine via a voltage divider to an Arduino, but I made a small enclosure for the lightbulb and the photocell that has a removable wall just in case the ES wanted to see- as it turned out, he didn't care as long as he could see the lightbulb light up during the device operation. With an Arduino or ATtiny, you should be able to set a threshold that definitely won't be triggered by ambient light.

Are matches allowed? My idea was to have kanthal or nichrome wire wrapped around a piece of a match, so that when the circuit is activated, the wire would get red hot and ignite the match, emitting light for a few seconds, which would then activate an LDR in a separate circuit.

Are matches allowed? My idea was to have kanthal or nichrome wire wrapped around a piece of a match, so that when the circuit is activated, the wire would get red hot and ignite the match, emitting light for a few seconds, which would then activate an LDR in a separate circuit.