Diagnostic readings for Bug Descratcher kits

11/18/2011 Chuck Olson WB9KZY

measurements with a generic DVM

resistance measurements
black lead connected to ground
red lead connected to pin in question
with both ICs removed (40107 and SSR)

40107 (8 pin part)
pin	reading 
1	infinite ohms
2	"	
3	"	
4	0 ohms
5	infinite ohms
6	"
7	"		
8	"

SSR (6 pin part)
pin	reading
1	infinite ohms
2	"	
3	"
4	"	
5	"
6	"
	

Key up voltage measurements
black lead connected to ground
red lead connected to pin in question
with both ICs inserted (40107 and SSR)
connected a 13.8 Volt (approximate) supply

40107 (8 pin part)
pin	reading 
1	13.8 V
2	"
3	0 V
4	"
5	13.1 V
6	.013 V
7	13.8 V
8	"

SSR (6 pin part)
pin	reading
1	13.8 V
2	13.1 V
3	rising V (floating pin)
4	"
5	"
6	"


Key down voltage measurements
black lead connected to ground
red lead connected to pin in question
with both ICs inserted (40107 and SSR)
connected a 13.8 Volt (approximate) supply

40107 (8 pin part)
pin	reading 
1	13.8 V
2	0 V
3	12.5 V
4	0 V
5	.022 V
6	12.3 V
7	13.8 V
8	"

SSR (6 pin part)
pin	reading
1	1.2 V	
2	.022 V
3	rising V (floating pin)	
4	"
5	"
6	"