| Electronic Schematic Symbols |
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| Component | Symbol | Component | Symbol |
|---|
| Antenna |  | Relay |  |
| Battery |  | Relay Contacts |  |
| Bulb (indicator lamp) |  | Resistor |  |
| Capacitor |  | Resistor (Tapped) |  |
| Capacitor (Electrolytic) |  | Resistor (Variable, Potentiometer) |  |
| Capacitor (Trimmer) |  | Silicon Controlled Rectifier (SCR) |  |
| Capacitor (Variable) |  | Speaker |  |
| Coil (Inductor) |  | Switch (SPST) |  |
| Connection (Chassis) |  | Switch (Push Button) |  |
| Connection (Wires) |  | Switch (Rotary) |  |
| No-Connection (Wires) |  | Switch (SPDT) |  |
| Crystal (Frequency) |  | Thermistor |  |
| Diode |  | Transformer (Iron Core) |  |
| Diode (Shottky) |  | Transformer (IF) |  |
| Field Effect Transistor (FET) (N-Channel) |  | Transistor (NPN Bipolar) |  |
| Field Effect Transistor (FET) (P-Channel) |  | Transistor (PNP Bipolar) |  |
| Fuse |  | Vacuum Tube (Diode) |  |
| Ground Connection |  | Vacuum Tube (Triode) |  |
| Inductor |  | Vacuum Tube (Tetrode) |  |
| Inductor (Iron Core) |  | Vacuum Tube (Pentode) |  |
| Inductor (Variable) |  -or-  | Unijunction Transistor |  |
| Light Emitting Diode (LED) |  | Varactor |  |
| Microphone |  | Voltmeter |  |
| Motor (Electric) |  | Zener Diode |  |
| Phone Jack |  | Headphones |  |
| Photo Cell |  | Coax or Shielded Cable |  |
Note: Standard orientation of symbols is for inputs on left or top and outputs on right or bottom.
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Copyright © 1997-2005 W5AM, Radioing.com.
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