■ FIGURE 2.
is the infrared (IR) sensor. This
responds to the codes emitted by an
ordinary television remote control.
It is often the case that a
microcontroller is expected to tame
higher power devices. For ventures
along these lines, I’ve included a
DPDT relay and a DC motor. With
regard to the latter, the ever versatile
PIC12F683 also includes pulse width
modulation (PWM) capabilities, so
it’s a snap to efficiently control motor
speed this way.
PARTS LIST
ITEM
DESCRIPTION
All fixed resistors are 1/4 watt, 5% values.
R1 47Ω
R2 100Ω
R3-R9 330Ω
R10 2.2K
R11-R23 4.7K
R24-R29 10K
R30, R31 10K potentiometer (LPC-10K)
R32-R36 20K
R37 22K
R38 100K
Capacitors are 10V or better.
C1 0.1 µF disc
C2 0.22 µF mylar
C3 1 µF electrolytic
C4 4. 7 µF electrolytic
C5 10 µF electrolytic
Semiconductors
D1, D2 1N4001 rectifier
D3-D7 Red LED
34
February 2013
D8
D9
Q1, Q2
Q3
IC1
IC2
Green LED
Bicolor LED (LED- 6)
2N3904 transistor
TIP112 Darlington pair (TIP112)
PIC12F683 microcontroller
Temperature sensor (LM34DZ)
Switches
S1
S2
S3
S4, S5
RELAY
4PST DIP switch (DWS-4S)
Four-bit binary switch (RS-162)
SPDT center-off toggle (MTS- 5)
SPST pushbutton (MPB-223)
5V/130Ω DPDT relay (RLY-625)
Jacks and Sockets
J1 2. 5 mm DC jack (DCJ- 17)
J2 3. 5 mm stereo audio jack
J3 Female D- 9 jack (DB-9S)
J4 Three-pin male header
(SHS- 32)
Two-pin SIP socket
Three-pin SIP socket
Four-pin SIP socket
Five-pin SIP socket
Six-pin SIP socket
Seven-pin SIP socket
J5, J6
J20 12-pin SIP socket
(See text for information on SIP sockets.)
Other Components
B1 5V/30 mA buzzer (SBZ-582)
B2 Piezo speaker (PE- 54)
IR Infrared receiver (see text)
LAMP 5V/125mA lamp (LP-715)
LDR CdS LDR (PRE- 24)
M1 5V/60 mA DC motor (DCM-406)
Miscellaneous: +5V regulated wall wart
(PS-513), power plug (DCLID), TV remote
control (REM- 4), circuit board, IC socket,
solder, wire, rubber feet, etc.
The PIC12F683 is available from many
supply houses, including SparkFun
Electronics ( www.sparkfun.com), Jameco
( www.jameco.com), and Mouser
( www.mouser.com).
Most of the other parts are available from
surplus houses. For example, the All
Electronics ( www.allelectronics.com)
stock numbers for the more unusual
items are shown above in parentheses.
