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--- electricity_electronics [2022/09/27 20:57] – renick
+++ electricity_electronics [2023/04/24 23:38] (current) – renick
@@ Line 32: / Line 32: @@
   * 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
+  * batteries, capacity, maximum current explainer: https://www.pololu.com/blog/2/understanding-battery-capacity-ah-is-not-a
 ==== rechargeable batteries ====
@@ Line 79: / Line 80: @@
 https://learn.sparkfun.com/tutorials/button-and-switch-basics/all
-===== How do we build electronics? =====
+===== 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 =====
+  * [[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 =====
 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.