Menambahkan RTC modul ke xbian atau raspberry

Ini sumbernya..

https://trick77.com/adding-ds3231-real-time-clock-raspberry-pi-3/
http://www.instructables.com/id/Set-up-Real-Time-Clock-RTC-on-Raspberry-Pi/
https://www.raspberrypi-spy.co.uk/2015/05/adding-a-ds3231-real-time-clock-to-the-raspberry-pi/
https://thepihut.com/blogs/raspberry-pi-tutorials/17209332-adding-a-real-time-clock-to-your-raspberry-pi

Video tentang microsoldering dan bongkar elektronik.

Dua video ini cukup menginspirasi 

Rangkaian power supply sederhana

Ane kalo bikin atau desain sesuatu yang ane pusingin selalu power supply buat rangkain. Output gak gede-gede amat sih Ini hasil pencariannya.

sumber : https://circuitdigest.com/electronic-circuits/transformerless-power-supply

Kurang lebih rangkiannya yang banyak beredar kaya gini, masalh output bisa diganti nilai 

Rumus standar capasitornya:

X = 1 / 2¶fC

X = Reactance of Capacitor

f = frequency of AC

C = Capacitance of X rated capacitor

We have used 474k means 0.47uF capacitor and frequency of AV mains is 50 Hz so the Reactance X is:

X = 1 / 2*3.14*50*0.47*10-6 = 6776 ohm (approx)

Now we can calculate the current (I) in the circuit:

I = V/X = 230/6775 = 34mA

So that’s how the Reactance and Current is calculated.