Elenco Electronics Projects 306-511 Instruction Manual page 52

Project #466
-51-
Meter Deflection (II)
OBJECTIVE: To build change the direction in which current
flows.
Compare this circuit to project #358, which has the LED (D1 & D2)
positions reversed. This changes the direction that current can flow.
Set the meter (M2) to the LOW (or 10mA) scale. Press the press
switch (S2) and now the meter deflects to the left.
Project #467
Automatic Display #1
OBJECTIVE: Construct a light-controlled display.
Connect segments B & C to the circuit. Turn on the switch (S1),
the display should be off. Place your hand over the photoresistor
(RP), now the number 1 lights.
Project #468
Automatic Display #2
OBJECTIVE: Light the number 2 using a light-controlled
display.
Use the circuit from project #467. Connect A, B, G, E, & D to the
circuit. Turn on the switch (S1), the display should be off. Place
your hand over the photoresistor (RP), now the number 2 lights.