antentopSince2 July

Ham Spirit
Antentop Free E-Magazine
Free Choice



Free Antentop Amateur Open Book
Antentop Album
Antentop Survey




Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

Special page devoted to

Simple “PIC- KEY”

Custom Search


ANTENTOP- 01- 2008, # 010 

Simple “PIC- KEY”



Credit Line:



This simple “PIC- KEY” provides sending Morse Code in two modes. First, that was written in the memory (four memory cluster), second, with hand jambic manipulator. 



Supply Voltage: +7... 17-Volts.

Consumption current:  5... 7 mA.

Keying speed could be adjusted up to 400 WPM.

Capacity of each memory cluster up to 60 letters (depends on the length of the letters and formatting the text).

Time of storage information in the memory- - more than 10 years (as specification on the Parts mentioned).

Rewriting resource:  more than 100000 times (as specification on the Parts mentioned).

Ratio “dot- gap- dash” is 3 or 5 dots. Gap more then 5 dots is wrote 5-dots.

Used jambic mode A. (The mode is mostly used in Russia).



Mike Kislinsky, RX9CBI

Figure 1 shows the schematic of Simple “PIC-KEY”


Functions of the Parts.


DA1: 5V- stabilizer;

DD1:  Microcontroller;

DD2:  Reprogrammable READ-ONLY Memory, capacity 2048 bits:

DA2: Clock generator for adjusting keying speed.

R14, C11: Set Clock frequency for the DD1 (near 400-500-kHz, in the schematic WDT set in “OFF”). 

VD1, VD2: Show mode of the key.




Tapping buttons S1… S4 turn on the reproduction of the Data from Cluster.




Tapping of any buttons (at this case begin reproduction from the taped button) or pressing the key do ending of reproduction

Holding buttons S1… S4 more the 1 second permits the write to the Cluster.

Tapping any buttons does the end of the writing.


First variant of the key was not intended for high speed, however, LZ2ZK (WITH MY LITTLE HELP) made increasing of the speed up to 400-WPM (that is nice for meteoric QSO).



73! Mike, RX9CBI







Page 78


78 79



QRP Transceivers and PA from Accessible Parts IP for QRP Antentop Book Radio Antenna Engineering Book Antentop Printed and e- magazines



Just for Fun:

Map IP Address

Thanks for your time!

Last Updated:

February 11, 2018 18:55

Antentop Home Page

Free Antentop Open Book