E
E
74HCT240
0.47uF
LED1
LED2
R
1
R
2
C
3
0
.4
7
u
F
C
6
0
.4
7
u
F
0
.4
7
u
F
C7
R3
D1
C1
C2
1000u
F
1000u
F
C
4
0
.4
7
µ
F
LED3
LED4
SCC3733
2x
AAA
Here’s the actual circuit diagram of the PumLantern’s circuit. It’s more
useful for those of you who might want to modify your PumLantern, or
build a second out of parts.
S
CHEMATIC
www.solarbotics.com
1-866-276-2687
Page 15
A
DDITIONAL
E
NHANCEMENTS
You might have noticed that there are little pads on the tabs that stick out
of your PumLantern. Once side has a single square pad, which is the
ground pad that connects to common grounds in the circuit.
The other tab has two pads: One labeled “S” and one “B”.
The “S” pad lets you add an additional solar cell (connected between “S”
(+) and the ground pad). This lets you use a large cell and have it power a
whole string of lanterns at the same time.
The “B” pad lets you directly connect to the battery (with the ground tab)
for easy recharging, or measuring voltage.
Tab
Ground Pad
Tab “S”
Pad
Tab “B”
Pad
