48
2.9 Solar light
Circuit 23:
Simple solar light
Setup information
Install the two diodes as shown in
Fig. 2.23.
Then install the resistor. Finally connect the solar cell.
Components required:
1 x solar cell, 1 x red LED,
1 x BAT85 Schottky diode,
1 x 220
Ω
resistor,
1 x breadboard
Fig. 2.23:
Simple solar light
Experiment
If everything is wired correctly, the red LED remains dark for as long as no light falls on the solar cell. For
example, the solar cell could be placed in a south window. The circuit itself could be placed in the base-
ment or somewhere in a room without windows. There it can tell you whether it is daytime and that the
sun is shining. This circuit demonstrates how easy it is to get free solar power. You could also use this cir-
cuit to power a small electronic device (pocket radio, mp3 player).
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.23.
Summary of Contents for ELECTRONICS EXPERIMENTS BOX
Page 4: ......
Page 265: ...267 Fig 3 56 Cir cuit 56 Audio limiter Fig 3 57 Circuit 57 Amplifier for a storm detector...
Page 269: ...271 Fig 3 64 Circuit 64 Stabilizer for 1 9 V Fig 3 65 Circuit 65 Stabilizer for 2 5 V...
Page 275: ...277 Fig 3 80 Circuit 80 Quiztimer 30 seconds Fig 3 81 Circuit 81 Handy diode tester...
Page 315: ...317 Fig 3 179 Circuit 179 HF generator 150 kHz Fig 3 180 Circuit 180 HF generator 420 kHz...
