Datasheet
Table Of Contents
Record Playback Essentials
www.kitronik.co.uk/2149
Adding a Flashing Memo Recorded LED
It is possible to use your Record Playback module as a memo, when doing this you might want to add a flashing LED
to indicate that there is a recorded memo that should be played back. The kit doesnt include the parts to do this,
however you only need a flashing LED and a slide or toggle switch to do this. The board includes an interface
connector and this will be used to connect the LED and the switch to the batteries. The flashing LED is designed to
run from a 5V supply and will work at 3V and doesnt need a current limit resistor. The diagram below shows how to
make the connections:
When connecting the LED make sure that the flat edge / short lead is connected to the 0V connection on the
interface connector. The switch should be connected to the 3V connection.
Suggested LEDs
3538 5mm flashing red
3539 5mm flashing green
3540 5mm flashing yellow
3545 5mm flashing blue
Suggested switches
Slide switches standard 3416, miniature 3404
Rocker switches rectangular 3406, round 3407
Toggle switches standard 3408, miniature 3413
Interface
Record playback
module
L E D
0V
3V
S witch