The custom PCB has PAM8403 audio amplifier, which is a stereo amplifier and has 3+3watts output. Microcontroller atmega328p has a 16Mhz smd crystal rasonator. RDA5807 Fm and other small controlling circuitry which you can see in the circuit schematics given above. Here I am using PAM class...
The "DIY 5~7W FM Transmitter Kit" is designed for 3.3V controllers and has I2C pull-up resistors connected to its 3.3V power supply. However, the Arduino Nano operates at 5V, producing 5V signals on the I2C bus, which can cause communication instability. Additionally, the Nano cannot run...
Arduino Walkie Talkie: The long wait is over, Tri-band Ham Radio Handheld Transceiver is here! Arduino Pro Mini based 430/220/144 MHz 2 Watts, fully customizable, programmable with these features: 2 watts output in high, midden and low; 70 cm band, 1.25
The 5V voltage regulator takes power from the 12V battery and converts it down to 5V to power up the Arduino, ADC, NRF24L01, LCD display, The maximum power consumption is less than 200mA. I used a buck converter with LC filter at the output to reduce noise coupling into the ADC. If ...
My old designs were based on a homebrew Arduino Nano using an ATmega328P-AU microcontroller IC, similar to what open green energy was using. I discovered that the Arduino Nano had a ton of limitations ever since I started designing higher power MPPTs. On the other hand, they were sufficien...
Nodes out in the field need to be self contained with power, and robust enough to handle wildlife. (The cow in the background likes chewing wires!) This shows a node in a weatherproof box. The solar panel is over-sized so it will charge on cloudy as well as sunny days. Inside the ...