Page 47 - Robots Androids and Animatrons : 12 Incredible Projects You Can Build
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3.2 PCB foil pattern
HE
Motor
+
R2
+ Q1 + C2
R1
C1 UJT
26
R3 +
UJT SCR
y Solar Cell
_ +
3.3 Parts placement on PCB
If when you spin the rotor it feels clunky or there is resistance, it
probably is a low-efficiency type.
Caveats regarding the solar engine
The solar cell used in this circuit is high voltage, high efficiency.
Typically solar cells supply approximately 0.5 to 0.7 V at various
currents depending upon the size of the cell. The solar cell used in
Team LRN
Chapter three
