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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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DFPlayer and Arduino

DFplayer  module is quite small and looks good for little project. The module read only audios in MP3 and WAV formats and all audio files must be placed under /mp3 folder. It’s required that files are named like 0001.mp3, 0002.mp3…..0255.mp3…

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LDR Sensor with Arduino

The LDR Sensor also know as the Photo-resistor is basically a simple sensor that its resistance value changes with light. (resistance will lower with more light.) The LDR isn’t very precise, so you can not get a LUX reading but it…

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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 digital…

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Troubleshooting and repairs

On the following sites you will find repair and operating instructions for repairing and maintaining your devices. Also you can free download all these users guide! These materials are for personal use only. Manuals for repair of mobile phone https://www.manuals.co.uk/telephone/mobile-phones…

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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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