= ELEGOO Upgraded Electronics Fun Kit
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{title2=2022}
2022-10 ELEGOO Upgraded Electronics Fun Kit https://www.elegoo.com/products/elegoo-electronics-fun-kits-4-versions Manuals:
* https://www.elegoo.com/blogs/arduino-projects/elegoo-electronic-fun-kit-upgraded-electronic-fun-kit-tutorial
* http://69.195.111.207/tutorial/ELEGOO/05%20Accessory%20Kit%20Tutorial/09%20Electronic%20Starter%20Kit/E2&E3/Elegoo%20Electronics%20Fun%20Kit(No%20UNO%20Board%20Included)%20V1.0.19.09.10.zip
* Elegoo <Breadboard> power supply module MB‐V2:
* Input voltage: 6.5-9v (DC) via 5.5mm x 2.1mm plug
* Output voltage: 3.3V/5v
* Maximum output current: 700 mA
TODO center positive or center negative?
Does not come with <AC adapter>, getting this one: https://www.amazon.co.uk/dp/B08ZN476FW output: DC 9V 1A Power Supply Adapter, Plug 5.5mm x 2.1mm, Center Positive,B rand: Security-01, input: AC 100-240V 50/60 Hz, Cable length: 1.8m
Parts list from the ZIP:
* resistors:
* 10x each:
* 10
* 100
* 330
* 2k
* 5.1k
* 10k
* 100k
* 1M
* 30x 220
* 1n4007 General Purpose Rectifier
* 22pf 104 Ceramic Capacitor
* 4N35 optocoupler
* 74HC595 8-bit serial-in, serial or parallel-out shift register with output latches; 3-state
* Active buzzer
* Buttons
* CDS-55 Photoresistor
* Electrolytic Capacitor
* Focusens MF52D 103f 3950 thermistor. Beta value 25/50 Celcius: 3950. R_25: I measured 9.61 k Ohms. The number 103 they document as:
* digit 1: code of dimension
* digit 2: rated resistance
* digit 3: fills with its precision symbol
These descriptions are weird, but ChatGPT has the theory that the first two digits are actual values, and the last is multiplier, so $10 \times 10^3$ which makes 10k.
but I have no idea how that maps to 10 k Ohms.
* PN2222 General Purpose Transistor
* Passive buzzer
* 3386p Bourns Precision Potentiometer - 1 103T: from 0 to 10k Ohms, measured with multimeter. According to the manual the "103" mean 10 k oms, which is consistent with our measurement. "P 103" is etched into the part.
* <LEDs>:
* White LED 10x
* Kingbright RGB LEDs 10x red, green, yellow, blue:
* maximum Continuous Forward Current: 30 mA for read and blue, 25 mA for green
* 303025
* under 20 mA
* Forward Voltage: 2.0 V typical, 2.5 V max
20 mA appears to be the typical operation. So with the 2.0 V drop on 5 V power we want a resistor such that:
$$
(5 - 2)/r = 20 \times 10^{-3} \implies r = 150 \Omega
$$
for the max 50 mA we would instead have 60 <Ohms>
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