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Make a Bluetooth speaker

I’m using BK8000L Bluetooth module (SBC audio decoding performance) and as amplifier the PAM8403  board. (but you can use any other amplifier for example from you old PC speaker) Problem with feedback and noise If  we want to power the…

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DS18B20 & LCD 128×64

Before I start, let’s of a quick review about the differences between DHT22 Temperature and Humidity sensor and DS18B20 Temperature sensor 1-Wire. (DHT22 vs. DS18B20) سنسور دما دیجیتال DS18B20,  سنسور رطوبت و دما DHT22, دماسنج NTC   DHT22 is a…

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DCF77 Signal with Arduino

The DCF77 signal is a puls-signal with AM modulation with carrier frequency 77.5kHz. It has a small bandwidth. The carries include time and date information and will be transmitted in a simple binary-coded format by on-off modulation of the carriers.  (100ms/200ms)…

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