Schematic Symbols and Components

Schematic Symbols Objectives Recognize schematic symbols Be able to draw the schematic symbols Recognize the actual components Understand the basic function of each component

Resistors Resistor Potentiometer Photoresistor

Potentiometer uses Volume control Light Dimmer switch Joystick control Sensors (Throttle Position)

Photo-resistor uses Light sensitive alarms Light Poles Light Tables Light-following robots

Capacitors: Basic Function: Stores electrical charge, used to filter low frequencies Electrolytic Mylar (chicklet) Disc Variable capacitor – Used in tuning circuits (tuning knob on a radio).

Capacitor Uses Surge Protector Tuning Circuits (Radio, TV, etc.) Storing Electrical Charges Travelling thru time

Diodes (one-way check valve for electricity) Diode Light Emitting Diode Photo-Diode Zener Diode

Diode Uses Changing AC to DC Protecting Circuits TV Remote / Detection

Thyristors Silicon Controlled Rectifiers (Gated Diode) TRIAC (used to control AC circuits / like 2 SCR’s back to back)

Transistors: switch, oscillator, amplifier NPN Transistor PNP Transistor UJT Transistor Photo Transistor

Transistor Uses Amplifier Switching Oscillating

Switches Normally Open Normally Closed SPST (Single Pole, Single Throw) SPDT (Single Pole, Double Throw)

Lights Incandescent Neon Florescent

Electromagnetic Devices Coil Speaker Microphone

Electromagnetic Devices Relay (Electromagnetically controlled switch) Transformer Antenna Motor

General Fuse Wire Crossing not connected Wires Crossing & Connected Buzzer

General Connector Terminal Crystal Voltage Regulator Operational Amplifier

Voltage Sources Battery AC Voltage Source

Voltage Sources / Grounds Earth Ground Chassis Ground AC Plug AC Outlet

Digital Logic Gates AND NAND OR NOR XOR Inverter (NOT)

Meters Digital Multimeters Ohmmeters Ammeters Voltmeters

Sources for pictures Capacitor: in_mcenroe_to_wit/2009/02/ok-ok-tales-of-geets.html&usg=__2F74WQM_txJ3Ue6FuDfV- DoUO18=&h=564&w=1081&sz=147&hl=en&start=1&um=1&tbnid=yaoeg4Bbu7btxM:&tbnh=78&tbnw=150&prev=/images%3Fq%3Dcapacitor% 26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 in_mcenroe_to_wit/2009/02/ok-ok-tales-of-geets.html&usg=__2F74WQM_txJ3Ue6FuDfV- DoUO18=&h=564&w=1081&sz=147&hl=en&start=1&um=1&tbnid=yaoeg4Bbu7btxM:&tbnh=78&tbnw=150&prev=/images%3Fq%3Dcapacitor% 26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 NPN Transistor: m/products/tr2222/&usg=__HCmGR5I7ru69QrUnQRgtwtjY-X4=&h=450&w=600&sz=23&hl=en&start=3&um=1&tbnid=8ho2yU- _u_gxlM:&tbnh=101&tbnw=135&prev=/images%3Fq%3Dnpn%2Btransistor%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DG%26um%3D1 m/products/tr2222/&usg=__HCmGR5I7ru69QrUnQRgtwtjY-X4=&h=450&w=600&sz=23&hl=en&start=3&um=1&tbnid=8ho2yU- _u_gxlM:&tbnh=101&tbnw=135&prev=/images%3Fq%3Dnpn%2Btransistor%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DG%26um%3D1 NPN transistor schematic: f.png&imgrefurl= rt=6&um=1&tbnid=VDfCRle8pJxkUM:&tbnh=130&tbnw=122&prev=/images%3Fq%3Dnpn%2Btransistor%26hl%3Den%26client%3Dfirefox- a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 f.png&imgrefurl= rt=6&um=1&tbnid=VDfCRle8pJxkUM:&tbnh=130&tbnw=122&prev=/images%3Fq%3Dnpn%2Btransistor%26hl%3Den%26client%3Dfirefox- a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 Voltage regulator: -crt.html&usg=__8bRR7QtFOPxrgwD- wZwcHu8wopA=&h=331&w=311&sz=17&hl=en&start=3&um=1&tbnid=EGC6FDfPgLccDM:&tbnh=119&tbnw=112&prev=/images%3Fq%3Dvoltage%2Bregulator%26hl%3Den% 26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 -crt.html&usg=__8bRR7QtFOPxrgwD- wZwcHu8wopA=&h=331&w=311&sz=17&hl=en&start=3&um=1&tbnid=EGC6FDfPgLccDM:&tbnh=119&tbnw=112&prev=/images%3Fq%3Dvoltage%2Bregulator%26hl%3Den% 26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1

Sources PNP transistor schematic (also has another, more detailed version of the NPN schematic: symbol.gif&imgrefurl= a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 symbol.gif&imgrefurl= a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 PNP transistor: stamp.com/components.htm&usg=__Hq_yfnl6KIOcvDi2drVGKwbWbB0=&h=169&w=256&sz=6&hl=en&start=21&um=1&tbnid=LBO_DsAspRH3IM:&tbnh=73&tbnw=111&prev=/images%3Fq%3DPNP%2Btransistor%2Bpicture%26ndsp%3D18%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DN%26start%3D18%26um%3D1 stamp.com/components.htm&usg=__Hq_yfnl6KIOcvDi2drVGKwbWbB0=&h=169&w=256&sz=6&hl=en&start=21&um=1&tbnid=LBO_DsAspRH3IM:&tbnh=73&tbnw=111&prev=/images%3Fq%3DPNP%2Btransistor%2Bpicture%26ndsp%3D18%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DN%26start%3D18%26um%3D1 PNP transistor 2: ArgSHfBmc=&h=377&w=395&sz=28&hl=en&start=26&um=1&tbnid=XjMupWmI5vj-5M:&tbnh=118&tbnw=124&prev=/images%3Fq%3DPNP%2Btransistor%2Bpicture%26ndsp%3D18%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DN%26start%3D18%26um%3D1 ArgSHfBmc=&h=377&w=395&sz=28&hl=en&start=26&um=1&tbnid=XjMupWmI5vj-5M:&tbnh=118&tbnw=124&prev=/images%3Fq%3DPNP%2Btransistor%2Bpicture%26ndsp%3D18%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DN%26start%3D18%26um%3D1 UJT Transistor: Photo Transistor: Diode: diodes/&usg=__aLQfjZ6rhkadtrrtGyiJ7S3fK2o=&h=296&w=300&sz=9&hl=en&start=7&um=1&tbnid=x_PEPyVPTY1qDM:&tbnh=114&tbnw=116&prev=/images%3Fq%3Ddiode%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3DwkF%26sa%3DG%26um%3D1 diodes/&usg=__aLQfjZ6rhkadtrrtGyiJ7S3fK2o=&h=296&w=300&sz=9&hl=en&start=7&um=1&tbnid=x_PEPyVPTY1qDM:&tbnh=114&tbnw=116&prev=/images%3Fq%3Ddiode%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3DwkF%26sa%3DG%26um%3D1 Zener Diode: VfGLq6GKSEiPQKJZ141BOfd4=&h=360&w=360&sz=52&hl=en&start=1&um=1&tbnid=JPMG9fZjVWyACM:&tbnh=121&tbnw=121&prev=/images%3Fq%3Dzener%2Bdiode%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3D86u%26sa%3DG%26um%3D1 VfGLq6GKSEiPQKJZ141BOfd4=&h=360&w=360&sz=52&hl=en&start=1&um=1&tbnid=JPMG9fZjVWyACM:&tbnh=121&tbnw=121&prev=/images%3Fq%3Dzener%2Bdiode%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3D86u%26sa%3DG%26um%3D1 Photo Diode: Photo Diode 2:

Sources LED: leds/&usg=__Q__BApCDgeOisXs7Ocmx4xNRp4A=&h=382&w=520&sz=25&hl=en&start=2&um=1&tbnid=6QsDcrRDWc4G9M:&tbnh=96&tbnw=131&prev=/images%3Fq%3Dlight%2Bemitting%2Bdiode%26hl%3D en%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3DWUa%26sa%3DG%26um%3D1 leds/&usg=__Q__BApCDgeOisXs7Ocmx4xNRp4A=&h=382&w=520&sz=25&hl=en&start=2&um=1&tbnid=6QsDcrRDWc4G9M:&tbnh=96&tbnw=131&prev=/images%3Fq%3Dlight%2Bemitting%2Bdiode%26hl%3D en%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3DWUa%26sa%3DG%26um%3D1 LED Schematic: 2&hl=en&start=23&um=1&tbnid=_HBSss17tBjWoM:&tbnh=127&tbnw=101&prev=/images%3Fq%3Dlight%2Bemitting%2Bdiode%26ndsp%3D18%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26hs%3D5Va%26sa%3DN%26start%3D18%26um%3D1 2&hl=en&start=23&um=1&tbnid=_HBSss17tBjWoM:&tbnh=127&tbnw=101&prev=/images%3Fq%3Dlight%2Bemitting%2Bdiode%26ndsp%3D18%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26hs%3D5Va%26sa%3DN%26start%3D18%26um%3D1 Switches schematic: 7XrhE0uieksNNZlPBbp_D2Y=&h=171&w=444&sz=2&hl=en&start=3&um=1&tbnid=ad9PMviOUwCMYM:&tbnh=49&tbnw=127&prev=/images%3Fq%3Dnormally%2Bopen%2Bswitch%26ndsp%3D18%26hl%3Den% 26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3D2Wa%26sa%3DG%26um%3D1 7XrhE0uieksNNZlPBbp_D2Y=&h=171&w=444&sz=2&hl=en&start=3&um=1&tbnid=ad9PMviOUwCMYM:&tbnh=49&tbnw=127&prev=/images%3Fq%3Dnormally%2Bopen%2Bswitch%26ndsp%3D18%26hl%3Den% 26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3D2Wa%26sa%3DG%26um%3D1 Normally open switch: n&start=5&um=1&tbnid=YdtkOXT2IX1RaM:&tbnh=107&tbnw=120&prev=/images%3Fq%3Dnormally%2Bopen%2Bswitch%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DG%26um%3D1 n&start=5&um=1&tbnid=YdtkOXT2IX1RaM:&tbnh=107&tbnw=120&prev=/images%3Fq%3Dnormally%2Bopen%2Bswitch%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DG%26um%3D1 Normally closed switch: v18/&usg=__B_jnzfd7KUYnPFjD0pqRKrOO- xU=&h=445&w=427&sz=559&hl=en&start=3&um=1&tbnid=MjW6N9j6dAol8M:&tbnh=127&tbnw=122&prev=/images%3Fq%3Dnormally%2Bclosed%2Bswitch%2Bexample%26hl%3Den%26client%3Dfirefox- a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 v18/&usg=__B_jnzfd7KUYnPFjD0pqRKrOO- xU=&h=445&w=427&sz=559&hl=en&start=3&um=1&tbnid=MjW6N9j6dAol8M:&tbnh=127&tbnw=122&prev=/images%3Fq%3Dnormally%2Bclosed%2Bswitch%2Bexample%26hl%3Den%26client%3Dfirefox- a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG%26um%3D1 SPST schematic: 495&w=657&sz=18&hl=en&start=1&um=1&tbnid=zJlagNTbsv3xPM:&tbnh=104&tbnw=138&prev=/images%3Fq%3DSPST%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DG%26um%3D &w=657&sz=18&hl=en&start=1&um=1&tbnid=zJlagNTbsv3xPM:&tbnh=104&tbnw=138&prev=/images%3Fq%3DSPST%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en- US:official%26sa%3DG%26um%3D1