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
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
the schematic of Simple "PIC-KEY."
of the Parts.
DA1: 5V- stabilizer;
DD2: Reprogrammable READ-ONLY Memory, capacity 2048
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).