www.nutsvolts.com/index.php?/magazine/article/december2010_QA
■ FIGURE 3
any help or suggestions.
— Marvin
AI have made a layout; see Figure 1. I plan to post the mirrored bottom layer on the N & V website so
anyone can download it. Just load
the .bmp file into Paint and print it. It
will come out the right size so you
can make a laser copy and iron it onto
your copper clad. You will need to
add some wires because I only made
it single-sided. The parts placement
guide (layout) is a separate file.
electrical device via a solid-state relay
when the storm was imminently
close. I was thinking of using a
microphone, photo detector, and
some type of moisture sensor. The
PIC would have to calculate the fact
that it is raining, then “see” the
lightning flash and “hear” the
thunder. These would all be ANDED
together.
— Fernando Cordero
LIGHTNING DETECTOR PARTS LIST
PART DESCRIPTION
R1, R2, R9,
R13, R8
R3
R4, R7
R5
R6
R10
R11, R12
C1, C3, C5
C2
C4
IC1
IC2
IC3
IC4
SW1
■ FIGURE 4
PART #
COST
LIGHTNING
PROTECTION CIRCUIT
QI have recently become fascinated with PIC microcontrollers and their capabilities. I was
wondering if a PIC circuit can be
made to (1) detect the rain; ( 2)
detect the flash of lightning; and ( 3)
determine the distance of the storm
by the time delay of the sound of
thunder.
The circuit would turn off any
10K, 1%, 1/4W
1 MEG, 1%, 1/4W
100K, 1%, 1/4W
RADIOSHACK CDS CELL
90.9K, 1%, 1/4W
470 OHMS, 1%, 1/4W
249K, 1%, 1/4W
0.1 µF, 10%, X7R
10 µF, 16V, 10%, TANTALUM
1 µF, 35V, 10%, TANTALUM
DUAL D FLIP-FLOP, CD4013
QUAD OP-AMP, LM324
QUAD TWO-INPUT NAND, CD4011
TIMER, LM/NE555
MOMENTARY PUSHBUTTON
DPDT, GOLD CONTACT
SW2 POWER SWITCH, SPST, TOGGLE
K1 RELAY, DPDT, 12V
SOCKET FOR RELAY
D1 GP DIODE, 1N4004
Q1 PNP GP TRANSISTOR, PN2907
VR1, VR2 MOV TRANSIENT PROTECTOR
MOUSER PART NUMBERS (EXCEPT RADIOSHACK)
271-10K-RC 0.09
271-1.0M-RC 0.09
271-100K-RC 0.09
276-1657 ( 5 pack) 2.99
271-90.9K-RC 0.09
271-470-RC 0.09
271-249K-RC 0.09
81-RPER71H104K2P1A03 0.12
74-199D16V10 0.65
74-199D35V1.0 0.40
595-CD4013BEE4 0.50
511-LM324N 0.43
595-CD4011BEE4 0.50
512-LM555CN 0.31
633-MB246109-RO 7.95
108-1MS2T1B1M1QE-EVX 1.90
653-G2R-2S-DC12S 4. 34
653-P2R-08P 1.78
512-1N4004 0.07
833-PN2907A-AP 0.14
650-ROV20-221K-S- 2
0.62
December 2010 25