Morse code beacon

Functional description

As you can see in the simple schematic, this circuit is made with a microcontroller and with more half a dozen discrete components:
hard schematics...hum....??
rushed prototype
you have to stop doing everything small
even the socket is bigger than the board...
protagonisms...
this was for a Ballon experiment !

PCB completely SMD

Direct connection to 5v, consumptions about 2 mA. Any led can be used, it indicates when the output is ON. If we use a high bright led, we can put a higher resistance value, with substancial decreasing in the consumption. To the ordinary NPN transistor, is where we are going to connect the end terminals of the morse jack of the radio, or any other circuit we wish to automate. The current in the transistor shouldnt exceed 100 mA.

Working modes

First one transmits at 12 WPM (words per minute). The second, implements audio output in the first mode. Phrases, delay times, and modes, are very easy to implement.

The firmware to setup, compile and program the PIC, with the Morse Code Beacon, is available here !!

 Atention !! -> code modification, PIC programming, and afterwards assembly, is entire responsability of the user. This project, is 100% operational, and there are several units working somewhere in Portugal, hence this, the autor, do not take responsability for “acidents” that may happen programming the PIC, or assembling the circuit.

Interested to know how much would it cost you ??  click here !!

[electronics]
[Beacon] [DTMF] [Repeater]
escrevam-me !