SubSystem : IP1 |
Task
Title:
Light to Voltage Converter |
Name:
Potential Divider
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IP1,
OP1 Modules |
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1, Place the IP1 and OP1 modules onto the Bridge Power Base (Fig 1.2). Connect up the OnTrack module to hold these down. 2, Use the four white leads (shown black in fig.1.2) to connect module IP1 to the L.D.R. and the 20K ohm variable resistor. 3, Connect the crocodile leads to OP1 and then to the red and black meter leads. Make sure they are the right way round. 4, Turn the multimeter switch to the 20v. (D.C.) position . 5, Check your wiring is accurate and then connect the 9 volt power supply. |
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Testing and Investigating: Don't
forget to write up your method and results afterwards. 7, Remove your finger from the L.D.R. and look at the new voltage shown on the multimeter. Has it risen or fallen? 8, With your finger still removed can you adjust the variable resistor to change the output voltage to about 1.2 volts and also 4.5 volts? (These are useful output voltages to have when connecting to other OnTrack sub-systems). |
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Try
building a heat sensor now.
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