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,
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.
or temperature dependent resistor
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.
Proper panel mount units with a metal or plastic spindle - plastic is easier to cut.
|Light dependent resistor
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!
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.
|Light detecting diode|
|Normally open switch|
|Normally closed switch|
|FET N,P channel|
MOSFET N,P channel
Jump from schematic symbols to
Best Microcontroller Projects Home page.
Find out how to use the AD9833 to generate sine, square and triangle waves at 0.1Hz resolution.
Arduino Nano ISP: How to program an ATmega328P using an Arduino Nano as the ISP programmmer. One common problem: Programming a sketch into the chip without a reset control - solved here.
Arduino Voltage reference: Both the Uno and Nano have a built-in voltage reference: Find out how to make it more accurate. In addition find out how to use it to measure the supply voltage 1V8 ~ 5V5
Arduino EEPROM: How to use it and How to preserve the life of EEPROM. Two examples sketches to save multiple values to EEPROM.
A tutorial on using the ADS1115 precision 16 bit ADC for low power use.
Learn how to use the TP4056 properly. There's a right, and a wrong way, to use it to safely charge Lithium Ion batteries.