Sub
System
Process
Devices
See Inputs
See Outputs


P1

BC548B
High Gain
Transistor

Amplifier - Connects an input sensor to a low power output device or to Process P8.


P1

BC548B
High Gain
Transistor

Inverter - Changes a "switched on" voltage to a "switched off" voltage.


P1

BC548B
High Gain
Transistor

Logic Interface - Produces a low or high output voltage that may be connected to logic circuits.


P2

Darlington
Pair
Transistor
Higher Power/Sensitivity Amplfier - Connects an input sensor to more higher powered output devices.


P2

Darlington
Pair
Transistor
Electronic Switch - Turns on an output subsystem (or P8) when a sensor has reached a certain level.


P3

RC
Timer
Delay unit / Timer - Creates a short delay before its output voltage becomes its input voltage.


P3

RC
Timer
Counter - waits until an input that is turning on and off to have switched for the required number of times.

P3
RC
Timer
Frequency to Voltage converter - Converts a pulsing input signal into a steady voltage (also known as an integrator).

P4
SCR106
Thyristor
Latch - Permanently turns a process or output device on when triggered (it is also resettable).

P4
SCR106
Thyristor
Memory Store- Remembers an event that has taken place earlier by switching on and remaining on until reset.

P5
BC637
Output
Transistor
Power Amplifier- Increases the power/current from some process devices to drive higher power output devices.

P5
BC637
Output
Transistor
Inverter- Converts the "sourcing" output of a process module into a "sinking" output that can drive other outputs.

P6
CA3140
Op Amp
Comparator
Signal Comparer- Compares the output of a sensor with a known voltage and switches an output on if it is greater.

P6
CA3140
Op Amp
Comparator
Analogue to Digital Converter- Produces a logic high or logic low output voltage when an input has reached a certain level.

P7
555
Timer
Astable
Clock/Pulse Generator- Produces a pulsing signal that turns on and off at a chosen rate or frequency.

P7
555
Timer
Astable
Alert Controller- Repeatedly switches a warning device on and off or two "sinked/sourced" flashing LED's.

P7
555
Timer
Astable
Variable Tone Generator- Produces tones with a wide range of frequencies. These tones could be set to musical notes.


P8

555
Timer
Monostable
Timer/ Momentary Latch- Switches an output or process subsystem on for a short time and then back to off.

P8
555
Timer
Monostable
Switch Debouncer- Removes the multiple pulses produced within a switch when it is operated.
Sub
System
Outputs
Device
See Inputs
See Processes
OP1

Filament Lamp
Use as an indicator to visually show that something has happened or to illuminate.

OP1

Light Emitting Diode
Use as a visual indicator to show if something is switched "on or off", or if something has happened.
OP1

On/Off Flashing L.E.D.'s
Flashes two LED's on and off alternately to get attention.
OP1

Piezo Sounder (variable tone)
Used to produce a wide range of quiet tones or musical notes.


OP1

Buzzer (mechanical fixed tone)
Produces a clear alerting/warning sound.


OP2

Solenoid
Use to make an electronic door lock or to move something linearly in and out.


OP2

Electromagnet
Picks up materials that are Ferrous using a magnetic field.

OP2
Electromagnetic Counter
A counter that registers events or simply counts up when pulsed.


OP2

D.C Motor 9-12 Volt
Drives medium torque motors with "smoothing" against noise and protection from"Back emf".

OP2
D.C.Motor 3 Volt
Drives small low torque motors with "smoothing" against noise and protection from"Back emf".


OP2

Mini Loudspeaker 64 ohm
Produces a wide range of clearly audible tones when supplied with a fast pulsing signal.

OP2
Piezo Siren Alarm
A siren which produces an ear piercing warbling sound.

OP3
Relay (Double Pole Double throw D.P.D.T.)
Allows seperate control of two different electrical circuits. It can switch circuits up to 5 amp/ 24volt.

OP3
Motor Reverser
Changes the direction of rotation of a medium torque motor by the use of a relay.
See Inputs
See Processes
(double
click
to see
information)

Input
Devices

See Processes
See Outputs


IP1

Light Sensor - Light Dependent Resistor (+ going voltage)
Detects when it has become brighter or if it is light.


IP1

Dark Sensor - Light Dependent Resistor (+ going voltage)
Detects when it has become dimmer or if there is darkness


IP1

Heat Sensor - Thermistor (+ going voltage)
Senses when a rising temperature has reached a certain point


IP1

Cold Sensor - Thermistor (+ going voltage)
Senses when a falling temperature has decreased to a certain level.


IP1

Water Sensor - Moisture Probe (+ going voltage)
Measures the dampness of a material or senses water.


IP1

Touch Sensor (+ going voltage)
Detects the touch of a finger.


IP1

Angle Sensor - Potentiometer (+ going voltage)
Indicates when something has turned through a required angle.

IP2/3
Key Switch - Latching (+ or - going voltage)
Produces safety or security by the use of a key.

IP2/3
Micro Switch - Non Latching (+ or - going voltage)
Used to detect the opening, closing, pushing, pulling of an object.

IP2/3
Push to Break Switch - Non Latching (+ or - going voltage)
Detects if something has been let go, a wire cut, or if an object has been removed.

IP2/3
Membrane Switch - Push to make (+ or - going voltage)
Responds to being hit, pressed, walked on or detects an object being put into position.

IP2/3
Magnetic Reed Switch - (+ or - going voltage)
Triggered by a magnetic field avoiding the need for physical contact.

IP2/3
Slide Switch - Latching Type (+ or - going voltage)
Operates when slid to the side.

IP2/3
Tilt Switch - Non-Latching (+ or - going voltage)
Detects something falling or leaning over.