The most useful electronic schematic symbols
These schematic symbols were created using ProSchematic a super easy to use
schematic drawing tool (schematic capture tool).
Note: Passive devices are devices
that do not change or amplify voltage or current when another parameter is
altered i.e. they react the same way and when a voltage or current (ac or dc)
is applied a constant output is observed e.g. a resistor, capacitor, inductior,
diode.
Note: Active devices are the opposite
of passive i.e. they alter their behaviour due to another parameter usualy to
amplify (e.g. transistor) but also act as a controlled switch (e.g. thyristor).
Another example is the resistance of a fet changing when the gate voltage
changes.
Schematic symbols for passive devices:
 |
Resistors |
 |
Thermistor or temperature dependent resistor |
 |
Presets Those three pin skeleton things that never fit into veroboard and you end up soldering veropins and piggybacking the thing on top! Really the same as a variable resistor with no case and much smaller. |
 |
Variable resistors Proper panel mount units with a metal or plastic spindle - plastic is easier to cut. |
 |
Light dependent resistor |
 |
Capacitors |
 |
Electrolytic capacitors These contain a electrolyte solution and when placed the wrong way round generally explode. These are also the symbols for tantalum which when placed the wrong way round generally smoke! |
 |
Variable capacitors These are the ones on a transistor radio 265pF (or larger for older radios). |
 |
Preset or trimmer capacitors These are miniature capacitors either with overlapping vanes (small round) ~65pF or a single plate that is rasied of the other with a screw. |
 |
Inductor |
 |
Diode |
 |
Zener Diode |
 |
Diac |
 |
Bell |
 |
Buzzer |
 |
Fuse |
 |
Lamp |
 |
Loudspeaker |
 |
Microphone |
 |
Transformer |
 |
Crystal |
 |
LED |
 |
Light detecting diode |
 |
Volt bar
(power supply) |
 |
Chassis GND |
 |
Normally open switch |
 |
Normally closed switch |
 |
Switch SPDT |
Schematic symbols for active devices:
 |
NPN,PNP transistior
|
 |
FET N,P channel |
 |
MOSFET N,P channel
|
 |
Darlington |
 |
Thyristor |
 |
Triac |
 |
Xenon tube |
Jump from schematic symbols to
Best Microcontroller Projects Home page.
Site Map | Terms of Use
Recent Articles
-
Arduino Interrupt : There are Some You May Never Have Heard About!
Arduino Interrupt Tutorial: Find out how many external there are on an Arduino Uno - The answer is more than two!
-
Easy Switch Debounce
Switch debounce: Three different ways to debounce input push switches with one amazing method that you can't miss.
-
How to use the ADS1115
A tutorial on using the ADS1115 precision 16 bit ADC for low power use.
-
How to use the ADXL345 for movement sensing and more.
With the ADXL345 acellerometer you can detect up to 16g! You can also find out how to use it for tap detection and more.
-
ESP8266 Webserver in Lua
ESP8266 Webserver: This code shows you how to use lua to create a webserver using html button inputs to contrtol an LED on the ESP module.
-
ESP8266 NodeMCU Firmware: ESP8266 flash
How to flash nodemcu firmware into a ESP8266 so you can use the LUA scripting language.
you so so so much
for all the information
you have provided in
your site it's
SUPERB and FANTASTIC."
- Ranish Pottath
the best and my favorite.
I find here many useful
projects and tips."
- Milan
bursach<at>gmail.com<
very, very easy and nice
to navigate!"
- Matt
matt_tr<at>
wolf359.cjb.net
"I am a newbie to PIC
and I wanted to say
how great your
site has been for me."
- Dave
de_scott<at>bellsouth.net
and perfect work.
congratulations."
- Suresh
integratredinfosys<at>
yahoo.com
words to define
yourweb site.
Very useful, uncovered,
honest and clear.
Thanks so much for
your time and works.
Regards."
- Anon
New! Comments
Have your say about what you just read! Leave me a comment in the box below.