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skc_assy_041722.pdf 

 
 
 
Two options for the finished envelope 

 

 
Before starting, think about how much room you have to install the keyer in your chassis and where you 
want to place it. There are two flexible options for building the keyer, from more room available, to least 
room available in your chassis. Read thru the instructions carefully and decide which fits your situation 
the best. 
 
 
Option 1 - 

Single board, .85”W x 1.50”L x .38”H 

 
 
Option 2 - 

Split connector board and main board, for the most mounting flexibility, joined by 4 
jumpers.  Connector  board  .85”W  x  .56”  L  x  .34”H.  Main  board  .85”sq.  x  .34”H.  The 
connector board mounts on the chassis wall, and the main board can mount anywhere 
there is access. 
 
 
 

 

 
 

 
With either option, the jack for the keyer or straight key is secured to the chassis using the threaded 
ring for the 3.5mm jack, with a second hole for the function button. In option 2 you can simply secure 
the  main  board  virtually  anywhere  inside  the  chassis  using  a  small  piece  of foam  double  sided  tape, 
and connect the two boards.  
 

 
 
 
 
 
 
 
 
 
 
 
 

Содержание KD1JV SKC Keyer

Страница 1: ...parts gmail com Please read all the instructions carefully before starting Parts List 1 KD1JV SKC Keyer pcb 1 U1 ATtiny45 microcontroller 8pin DIP 1 U2 78L05 TO 92 case 1 Q1 2N7000 mosfet 1 D1 1N4148...

Страница 2: ...85 W x 1 50 L x 38 H Option 2 Split connector board and main board for the most mounting flexibility joined by 4 jumpers Connector board 85 W x 56 L x 34 H Main board 85 sq x 34 H The connector board...

Страница 3: ...ad is Install U2 78L05 observe the outline shown on the board Mount U2 very close to the board so that the top is no more than 1 4 above the board Install Q1 2N7000 mosfet observe the outline shown on...

Страница 4: ...3 5mm threaded ring First cut the board where indicated with a hacksaw or tin snips as shown below Be careful to keep it between the lines You may carefully dress the edges with a file or rub on piece...

Страница 5: ...the pins are flared so that they can be retained by auto insertion tools Gently rock them on a flat surface so the pins are parallel and they will insert into the socket more easily Be sure of pin 1...

Страница 6: ...o drill two holes as described below and mount the keyer board or connector board directly with the 3 5mm jack that is soldered to the pcb The pushbutton is slightly higher than the 3 5mm jack As view...

Страница 7: ...to send message 2 M2 OR Change Code Speed Wait 1 second The letter S will sound by the side tone indicating you can now change the code speed Speed is changed in 1 WPM increments 5 to 30 WPM Initial d...

Страница 8: ...le to store in location 2 side tone MS normal operation will resume To re enter a message TAP the function switch side tone EM You can now repeat the process Sending a message Tap the function switch...

Страница 9: ...ne pitch and keyer speeds the supply voltage must be near 5 volts and be stable hence the 78L05 regulator The input voltage is 7 15VDC max You do not hear your code on the Function Tone pin The functi...

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