User Guide

3
SK-201 “SOFT KEY” MODULE
HARBACH ELECTRONICS
Jeff Weinberg – W8CQ
468 County Road 620
Polk, OH 44866-9711
[phone]
http://www.harbachelectronics.com
[e-mail]
PARTS LIST
R1 100KΩ ½W 5%
R2 10KΩ ¼W 5%
R3 2KΩ ¼W 5%
C1 100µF 10VDC
D1 1N4005 (1A 600 PIV)
D2 1N5817 SCHOTTKY (1A 20V)
D3 1N60 GERMANIUM
IC1 4N33 OPTOCOUPLER