Another Scout Project

[securespark]

LED Season's Greetings Cards.

The idea is to use a 3V button cell a simple switch and some LED's. The "circuit" will be made with tin foil and I am planning to use red and green LED's.

I know I could incorporate a 555 chip to make it flash, but want to keep it reasonably simple.

Maybe I could get some flashing LED's?

 

[knowall]

Don't forget the RCD !

 

[securespark]

Hmmm. A 3V RCD. How many mA shall I ask for?

 

[333rocky333]

seen them cells in the poundshop, you get loads for a guid, proberly do the job rather than pay loads of money, or maybe get there little novelty things and chop the leds and bits of them

 

[securespark]

Thought about the pound shop, but I need batts with tabs. There's an ebay chap selling Varta 2032's for 11.99 for 50.

 

[bernardgreen]

RCD = Rampant Cub Detector

 

[securespark]

Now, now Bernie....

 

[ban-all-sheds]

Remaining Campsite Debris?

 

[bernardgreen]

B A S Ban All Scouts

No scouts would ever leave a mess like that.......

 

[securespark]

Not ours anyhow. We always have a litter sweep.

 

[JohnW2]

The idea is to use a 3V button cell a simple switch and some LED's. The "circuit" will be made with tin foil and I am planning to use red and green LED's. ... I know I could incorporate a 555 chip to make it flash, but want to keep it reasonably simple. ... Maybe I could get some flashing LED's?

Do I take it that you've looked around 'craft' suppliers? I would have expected that there would be sources of cheap (and probably very 'flat ) components (LEDs, switches, batteries) specifically designed for the sort of purpose you have in mind?

Kind Regards, John

 

[bernardgreen]

One source is

http://www.jprelec.co.uk/store.asp/c=634/8mm-Flashing-LEDs

and self adhesive copper tape

http://www.jprelec.co.uk/store.asp/c=722/Copper-Track

There are other suppliers

 

[securespark]

Thanks John. I started by looking at Hobbycraft. They don't have any electronic components.

Bernard, the LED's are no good voltage-wise, but I'll look at the track. Thanks.

 

[JohnW2]

Thanks John. I started by looking at Hobbycraft. They don't have any electronic components.

Fair enough. Have you tried "Hobbies" (I haven't looked - but just a thought!)

Kind Regards, John

 

[bernardgreen]

Could you risk using 9 volts from a PP3 battery as they are easy to connect to using two drawing pins in a piece of wood as contacts and a rubber band to press the battery against the pins.