Elenco Snap Circuits SnapMicro ® I Standard - Manual (Page 70)

69
Build the Green Power Meter Circuit shown here.
Flashes once each minute when it records lamp as on. No Flash if lamp off.
To shield the photo resistor RP from daylight and other light sources you should take a
tube from a roll of paper towels and cover one end with a piece of paper as shown here.
Punch a pencil size hole in the paper and cut the other end of the tube so it fits over the
photo resistor RP in the circuit above. Aim the hole in the tube at the lamp being measured
so only light from that lamp hits the photo resistor.
To Computer
B
C
D
E
F
2 3 4 5 6
A
G
1 7 8 9 10
1
1
2
2
1
2
2
2
1
1
1
2
1
1 2
2
2
2
2
2
1
2
2
1
2