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Electric-Electronic Circuits The next 43 slides cover various electric and electronic circuits which have been employed in devices

throughout the U.S. or abroad. These circuits are not an all-inclusive listing, nor is it intended to be.

Hopefully you will have the time and supplies to build the circuits and experiment with them. If you

have the funds available, Radio Shack has several mini-engineer notebooks which cover different

experiments and circuits which can be adapted to our uses.

If you utilize the small white Radio Shack buzzers, a 100; (Ohm) resistor placed in parallel with the

buzzer may be necessary. Some of these buzzers are equivalent to a 55meg ; resistor and do not

allow enough current through t hold open a transistors Gate. The 100 ; resistor allows a sufficient

amount of current to flow through to keep the Gate open.

If you have any problems or questions, feel free to contact me: Drew A. Prater, W: (256)842-

2324/2325 or dayres@ix.netcom.com.

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Foil Switch

9v

Tin Foil

I

n

s

u

l

a

t

o

r

Tin Foil

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9V 9V

+- +

Buzzer

-

SCR

Switch

Photocell

-

Sensitive Photo Cell

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Sensitive Photo Cell Circuit

9v

9v

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PHOTO-CELL

TRANSISTOR

Photo-cell Circuit

9V

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Photo Cell Device

Anode

Cathode Gate

9V

SCRPhoto Cell

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SCR

9V

+

Buzzer

-

-

Photocell

Photo Cell

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PIR Device

SCR

9V

+Switch

+ Buzzer

-

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PIR Device

9V

TNT

Transistor Red lead

Switch

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Passive Infrared

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Radio Device

8

Anode

Cathode Gate

9V

SCR

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Pressure Release Circuit

3v

NC NO C

Magnetic Reed

Switch

Microswitch

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9V

+

-

MICRO-SWITCH

NC NO C

Series Circuit - Pressure Release

Microswitch

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Pressure Microswitch

9V

+

-

MICRO-SWITCH

NC NO C

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Collapsing Circuit

9V

9V

B

A

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Collapsing Circuit

9V

9V

C

A

B

3V

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6v

NC NO C

Magnetic Reed Switch

LEDMicroswitch

Pressure Pads

Safe/Arm Switch

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E-Cell Circuit

Toggle

SwitchE-CellResistor

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9v

SC1

Penalty DeviceBP1-1

S1

S2

L1

L2

BP1-2

BP2-1

BP2-2

BZ1

D1

Bombs by DAP.

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Tilt Device

Anode

Cathode Gate

9V

SCR

Mercury Switch

Vapor Switch

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Vibratory Circuit

Anode

Cathode Gate

9V

SCR

Vibratory Switch

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Capacitor Firing System

Capacitor

9V

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Capacitor Firing System

Capacitor

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Resistor/Capacitor Circuit

Toggle

SwitchCapacitorResistor

TRANSISTOR

9V

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SCR

LOAD

Anode

Cathode Gate

9V

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Silicon Controlled Rectifier (SCR)

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LOAD

Transistor

NOTE: Touch base leg to + and - side of battery. If + side makes light glow, transistor is an

NPN type. If - side makes light glow, transistor is a PNP type.

9V

Base

Collector

Emitter

Transistor Check

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Transistor in Package

Metal tab makes

contact to collector of

chip and helpsconduct heat away.

Solid plastic

molded around

silicon chip

BaseCollector

Emitter

Terminals

make contact

to chip

Silicon chip

has three parts

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Fusible Element (GPO)

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FIRING SWITCHES

DETONATOR

ARMING

CONTACTS

FUSIBLE ELEMENT

SWITCH

POWER SOURCE

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Canadian Device

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SHORTED PLUG

COMPLETES CIRCUIT

PLUG & JACK

POWER

SOURCE

NOTE 3

JACK

NOTE 1 POWERSOURCE

CIRCUIT 1

NOTE 2

POWER

SOURCE

LOAD

CIRCUIT 2

CIRCUIT 3

LOAD

COIL

NOTE: 1. Power source A: Decays eliminating power to coil of relay, thereby allowing

movable arm to go back to original position completing Circuit C.

2. Cutting wire leading to coil allows moveable arm to go back to original position

and completes Circuit C.

3. Spring attached to movable arm can overcome magnetic force exerted by coil

if power source A is weak and relay is jarred hard enough.

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Midlander Device

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Booby Trapped Flight Bag

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99 Hour Timer

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9V

Transistor

Black lead

Red

Lead

TNT

Switch

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555 Timer Circuit

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555 Timer Circuits

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