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question about TL431 and PC817 on SMPS circuit
Hello I have a question about using TL431 and optocoupler as feedback. The attached circuit is as an example.   I understood like this.  The way the output signal is fed...
Sunday, 26 April 2020 - 07:12
Atmega chip burns when connected to POWER
Hello! I'm studying electronic and I tried to make H-bridge motor drive circuit for experience.  but I got a problem.  I am not an expert in this field and I am learning...
Wednesday, 12 February 2020 - 10:57
about Atmega128a and crystal load capacitance
Hello! I got a question.    I wanna configure an external clock circuit in AVR. but, To select the crystal,11.0592MHz  I found load capacitance of crystal. ...
Saturday, 26 October 2019 - 09:54
problem about HD44780 LCD controller
Hello! i wanna ask how to control LCD. using mega128   here problem occurred. From the lab board i was practicing, here RS, RW, E pin was connected to PORTC.   but...
Wednesday, 9 October 2019 - 07:16