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electricity_electronics [2022/09/28 20:32] – renickelectricity_electronics [2023/04/24 23:38] (current) – renick
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   * https://www.wondriumdaily.com/how-do-batteries-work-and-run-out/   * https://www.wondriumdaily.com/how-do-batteries-work-and-run-out/
   * https://www.open.edu/openlearn/science-maths-technology/science/physics-and-astronomy/physics/how-do-batteries-work   * https://www.open.edu/openlearn/science-maths-technology/science/physics-and-astronomy/physics/how-do-batteries-work
 +  * batteries, capacity, maximum current explainer: https://www.pololu.com/blog/2/understanding-battery-capacity-ah-is-not-a
  
 ==== rechargeable batteries ==== ==== rechargeable batteries ====
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 https://learn.sparkfun.com/tutorials/button-and-switch-basics/all https://learn.sparkfun.com/tutorials/button-and-switch-basics/all
 +
 +===== relays =====
 +
 +  * https://www.swe-check.com.au/editorials/understanding_relays.php
 +  * https://tutorial.cytron.io/2012/08/01/identify-terminal-pins-of-a-relay-without-reference-to-datasheet-2/
 +
 +===== first oscillator: astable multivibrator =====
 +
 +First one is a good tutorial on building the circuit; I followed this spec. The second one is a good explanation of why it works.
 +
 +  * https://www.youtube.com/watch?v=vEB51qd21Do
 +  * https://www.youtube.com/watch?v=EZ0YZcC84m4
 +
 +This is a good technical description of the astable multivibrator:
 +  * https://www.electronics-tutorials.ws/waveforms/astable.html
 +
 +Here's an [[led-oscillator|astable multivibrator with potentiometer to control oscillation speed]].
 +
 +Use an astable vibrator to produce audio:
 +
 +===== Force Sensitive Resistor =====
 +
 +A good tutorial on force-sensitive resistors: https://lastminuteengineers.com/fsr-arduino-tutorial/
 +
 +Here's [[electronics-fsr-01|a circuit which uses an FSR to control an LED.]]
  
 ===== exercises =====  ===== exercises ===== 
  
-[[electronics-switch-green-red|a circuit with a switch to alternate between green and red LEDs]]+  * [[electronics-series-parallel|compare the difference between three LEDs in series and parallel]] 
 +  * [[electronics-switch-green-red|a circuit with a switch to alternate between green and red LEDs]]
  
 ===== chaotic circuits ===== ===== chaotic circuits =====
  
 https://www.chaotic-circuits.com/ https://www.chaotic-circuits.com/
 +
 +===== using speakers =====
 +
 +breadboard speakers:
 +
 +  * https://www.instructables.com/Breadboard-Speaker/
 +  * https://www.instructables.com/LETS-MAKE-a-PORTABLE-SPEAKER-ON-a-BREADBOARD/
 +
 +===== speaker design =====
 +
 +  * https://www.nytimes.com/1986/10/19/arts/sound-the-importance-of-the-loudspeaker-box.html
 +
 +===== DIY synths =====
 +
 +https://northcoastsynthesis.com/synth-diy-projects/
 +
 +===== universal PCBs =====
 +
 +  * https://hillmancurtis.com/universal-pcb/
 +  * https://www.instructables.com/How-to-Prototype-Without-Using-Printed-Circuit-Boa/
 +
 +===== first circuit to circuit board: LED with switch and 9V battery =====
 +
 +[[electronics-first-circuitboard-led|Here's a first circuit to practice.]]
 +
 +Once you have done that, try making [[electronics-oscillator-in-a-box|this oscillator on a circuit board and then installed in a plastic container]].
 +
 +===== designing custom arduino shields =====
 +
 +https://resources.altium.com/p/how-design-custom-arduino-shield-board
 +
 +===== using johnny five to control an arduino-based UV sensor =====
 +
 +[[electronics-uv-sensor-arduino|This code]] will allow you to display the data from a UV sensor attached to your Arduino.
  
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  • by renick