Hi,
I have done this simple beeper with powerfull flashing LED:
https://www.youtube.com/watch?v=m6tb76LirxM
These new powerfull LEDs flash like mad, unfortunately flashing can't be seen well in the video. Next version will beep during the day for 1 hour and flash during night also for 1 hour. Prototype is already working on my desk
As it is it fits into 18mm rocket and weights 22 grams incl. battery.
This is a version of "older" brother:
https://www.youtube.com/watch?v=OqqlMNDbZ6E
which is even smaller and lighter but it has no flashing LED.
I have done this simple beeper with powerfull flashing LED:
https://www.youtube.com/watch?v=m6tb76LirxM
These new powerfull LEDs flash like mad, unfortunately flashing can't be seen well in the video. Next version will beep during the day for 1 hour and flash during night also for 1 hour. Prototype is already working on my desk
As it is it fits into 18mm rocket and weights 22 grams incl. battery.
This is a version of "older" brother:
https://www.youtube.com/watch?v=OqqlMNDbZ6E
which is even smaller and lighter but it has no flashing LED.