Elenco Basic Electronic Experiments - Manual (Page 8)

8
EXPERIMENT #1: The Light Bulb
First, decide if you will use a 9V battery (alkaline is best) or the adjustable power supply that is part of the XK-150, XK-550,
and XK-700 Trainers. If using a battery then snap it into its clip. Always remove the battery from its clip if you won’t be using
your PK-101 for a while. Insert the red wire from the battery clip into hole j4 and the black wire into hole (–)3.
If using the adjustable power supply then turn it on and adjust it for 9V. Connect a wire from the positive adjustable voltage
output to hole j4 and another wire from the power supply negative output (ground) to hole (–)3.
Let’s introduce another component, the LED (light emitting diode). It is shown below, with its symbol. We’ll explain what it
does in just a few moments.
Now insert the components for this circuit into your breadboard according to the list below (the first item is for the
battery/power supply which you already did above), which we’ll call the Wiring Checklist. When you’re finished your wiring
should look like the diagram shown at right:
1 2
Parts Needed:
• a 9V battery or power supply
• one Switch
• one 10k Ω resistor
(marked brown-black-orange-gold, in that order)
• one LED
• 2 wires
Wiring Checklist:
Insert red battery wire or positive power supply into
hole j4 and black battery wire or negative power
supply (ground) into hole (–)3.
Insert switch into holes f4 and f5.
Insert the 10k Ω resistor into holes j5 and j9.
Insert the LED into holes g20 and g21. NOTE: The
“flat” side of the LED (as shown on the picture
above, and usually the shorter wire) goes into g21.
Insert a short wire between holes h9 and j20.
Insert a short wire between holes f21 and (–)21.
Be sure all your wires are securely in place and not
loose. Also make sure the metal into each hole is
not touching any other metal, including other parts
of the same component.
9V
BATTERY
POWER
SUPPLY
+9V
0V (GROUND)
(BLACK)
(RED)
10k Ω
RESISTOR
LED
(symbol shows flat
side is on right)
SWITCH
WIRES
WIRING DIAGRAM
LED
Flat
Symbol for LED