Sub
System |
Process
Devices |
See
Inputs
See Outputs |
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BC548B
High Gain Transistor |
Amplifier - Connects an input sensor to a low power output device or to Process P8. |
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BC548B
High Gain Transistor |
Inverter - Changes a "switched on" voltage to a "switched off" voltage. |
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BC548B
High Gain Transistor |
Logic Interface - Produces a low or high output voltage that may be connected to logic circuits. |
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Darlington
Pair Transistor |
Higher Power/Sensitivity Amplfier - Connects an input sensor to more higher powered output devices. |
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Darlington
Pair Transistor |
Electronic Switch - Turns on an output subsystem (or P8) when a sensor has reached a certain level. |
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RC
Timer |
Delay unit / Timer - Creates a short delay before its output voltage becomes its input voltage. |
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RC
Timer |
Counter - waits until an input that is turning on and off to have switched for the required number of times. |
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P3 |
RC
Timer |
Frequency to Voltage converter - Converts a pulsing input signal into a steady voltage (also known as an integrator). |
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P4 |
SCR106
Thyristor |
Latch - Permanently turns a process or output device on when triggered (it is also resettable). |
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P4 |
SCR106
Thyristor |
Memory Store- Remembers an event that has taken place earlier by switching on and remaining on until reset. |
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P5 |
BC637
Output Transistor |
Power Amplifier- Increases the power/current from some process devices to drive higher power output devices. |
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P5 |
BC637
Output Transistor |
Inverter- Converts the "sourcing" output of a process module into a "sinking" output that can drive other outputs. |
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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. |
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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. |
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P7 |
555
Timer Astable |
Clock/Pulse Generator- Produces a pulsing signal that turns on and off at a chosen rate or frequency. |
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P7 |
555
Timer Astable |
Alert Controller- Repeatedly switches a warning device on and off or two "sinked/sourced" flashing LED's. |
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P7
|
555
Timer Astable |
Variable Tone Generator- Produces tones with a wide range of frequencies. These tones could be set to musical notes. |
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555
Timer Monostable |
Timer/ Momentary Latch- Switches an output or process subsystem on for a short time and then back to off. |
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P8 |
555
Timer Monostable |
Switch Debouncer- Removes the multiple pulses produced within a switch when it is operated. |
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Sub
System |
Outputs
Device |
See
Inputs
See Processes |
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OP1
|
Filament
Lamp |
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OP1
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Light
Emitting Diode Use as a visual indicator to show if something is switched "on or off", or if something has happened. |
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OP1
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On/Off
Flashing L.E.D.'s Flashes two LED's on and off alternately to get attention. |
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OP1
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Piezo
Sounder (variable tone) Used to produce a wide range of quiet tones or musical notes. |
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Buzzer
(mechanical fixed tone)
Produces a clear alerting/warning sound. |
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Solenoid
Use to make an electronic door lock or to move something linearly in and out. |
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Electromagnet Picks up materials that are Ferrous using a magnetic field. |
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OP2 |
Electromagnetic Counter A counter that registers events or simply counts up when pulsed. |
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D.C
Motor 9-12 Volt Drives medium torque motors with "smoothing" against noise and protection from"Back emf". |
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OP2 |
D.C.Motor
3 Volt Drives small low torque motors with "smoothing" against noise and protection from"Back emf". |
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Mini
Loudspeaker 64 ohm Produces a wide range of clearly audible tones when supplied with a fast pulsing signal. |
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OP2 |
Piezo
Siren Alarm A siren which produces an ear piercing warbling sound. |
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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. |
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OP3 |
Motor
Reverser Changes the direction of rotation of a medium torque motor by the use of a relay. |
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See
Inputs
See Processes |
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(double
click to see information) |
Input |
See
Processes
See Outputs |
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Light
Sensor
- Light Dependent Resistor (+ going voltage) Detects when it has become brighter or if it is light. |
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Dark
Sensor - Light
Dependent Resistor
(+
going voltage)
Detects when it has become dimmer or if there is darkness |
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Heat
Sensor
- Thermistor (+
going voltage)
Senses when a rising temperature has reached a certain point |
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Cold
Sensor
- Thermistor
(+
going voltage) Senses when a falling temperature has decreased to a certain level. |
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Water
Sensor
- Moisture Probe
(+
going voltage) Measures the dampness of a material or senses water. |
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Touch
Sensor
(+
going voltage)
Detects the touch of a finger. |
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Angle
Sensor
- Potentiometer
(+
going voltage)
Indicates when something has turned through a required angle. |
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IP2/3 |
Key
Switch - Latching (+ or - going voltage) Produces safety or security by the use of a key. |
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IP2/3 |
Micro
Switch
- Non Latching (+
or - going voltage) Used to detect the opening, closing, pushing, pulling of an object. |
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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. |
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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. |
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IP2/3 |
Magnetic
Reed Switch - (+ or - going voltage) Triggered by a magnetic field avoiding the need for physical contact. |
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IP2/3 |
Slide
Switch - Latching
Type
(+
or - going voltage)
Operates when slid to the side. |
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IP2/3 |
Tilt
Switch - Non-Latching (+ or - going voltage) Detects something falling or leaning over. |
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