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Topic: I need a hundred bright morse code emitters - must be light, bright and small. (Read 1 time) previous topic - next topic

retrolefty


I don't think that's the case Lefty.

There is certainly room for discussion on the possibilities.

Having an arduino clone drive LEDs, that's easy.

Leds as bright as "as bright as police dashboard lights or a flashing aviation light on a skyscraper rooftop." ?
Have you ever seen the aviation strobe lights on tall buildings used for FCC compliance, how big and heavy they are and the power they consume? And to be placed on a $5 foam glider such that it's flight characteristics are not negatively effected. Cough, choke, give me a break. The OP's specifications are fantasies.

Writing a sketch to read from progmem and output morse code, that's pretty straightforward. There's been examples of character to morse code creation sketches posted.  Having a sketch that can accept serial data and store to EEPROM for reading out, also not too hard, that's what I was doing with my scrolling message  board.

Downloading a new sketch which contains a morse code message to be flashed, can be done via simple TTL serial interface from a master board, an FTDI type interface that is plugged in as needed (low card cost), or RF module can be added for Fio type downloading with a higher card cost.

I'd opt for plug in & download serially to EEPROM personally,with wireless as an option, and maybe a switch to ensure RF is turned off when not being programmed.
315/434 MHz receiver/virtualwire, or a nrfl2401+ transceiver (SPI interface), both add about $5 in extra hardware modules.


retrolefty



A single LED is not bright enough.


There are some pretty bright individual LEDs out there.


Yes they are, but:
"as bright as police dashboard lights or a flashing aviation light on a skyscraper rooftop." ?


And to be mounted and be powered on a $5 foam glider no less.  :D
LOL

Lefty

CrossRoads

You get 20 20,000mCD LEDs, that's gonna be pretty damn bright.
I couldn't take 3 of them at 20mA, had to tone way down to like 2-3mA.

http://www.dipmicro.com/store/LED5W
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

retrolefty


You get 20 20,000mCD LEDs, that's gonna be pretty damn bright.
I couldn't take 3 of them at 20mA, had to tone way down to like 2-3mA.

http://www.dipmicro.com/store/LED5W


If too bright might it not start to melt the $5 foam glider?  ;)

Lefty

CrossRoads

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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