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I am using XMEGA-B1 XPLAINED board. It has dataflash AT45DB642D. I am trying to use USART in Master SPI mode for the same, but somehow I am unable to do it successfully. I have done same with normal SPI mode and its working properly.
When it comes to USART in Master SPI mode it doesn't work...
You successfully did for one digit number...right? Then what happens when you go for two digit number? What do you see on display?
If it shows only single number for two digit logic then problem could be in your display logic.
While displaying two digit number how do you separate higher and...
Speaker is of 8 Ohm only. Do you suggest that I should decrease value of R17 to 10 Ohm?
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I have tried by changing it to 18 Ohm but no luck.
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i.e. making values exactly half...18Ohm, 18Ohm, 9Ohm.
For now keep aside volume circuitry. My first concern is to get high audio intensity so that it is high enough to be audible. In that case what changes should I make in above circuit? Shall I change from high driver to low driver circuit for speaker?
Look, Audio_Out goes to PWM o/p pin. V1 & V2 are connected to gpio of controller, which in turn used to ON & OFF MOSFETs. So that if put ON both V1 & V2, I will get highest volume.
Actually I used these two MOSFETs to change volume levels of speaker.
I am using following circuit for driving my speaker. Can someone guide me, what will happen if I use low drive circuit for speaker instead of high drive circuit?
As per above circuit, Vcc is 3.3V. Will it make any change if I change Vcc from 3.3V to 5V?
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Please help me...
I just want to play .wav files using PWM & someone told me that if you play samples at frequency at which gain of speaker is maximum, you will get louder voice from speaker. Because for the speaker which I mentioned in #1 I am getting too low voice when I sample as I said in #7. i.e. sample at...
I can get maximum PWM frequency of 31250Hz & I have decided to sample .wav file at 7812Hz or 8000Hz. Although it seems difficult from the graph above to get frequency for maximum gain.
Would you please explain? What should be the exact relationship between PWM frequency & wav file sampling frequency? As BradtheRad has said if gain is highest at 4.3KHz then what should be PWM frequency & wav file sample frequency?
That is what I am not getting. Because according to the frequency on the graph I want to set PWM frequency, so that I will get good sound quality. I will try by 4.3KHz. I was assuming it near to 7KHz. But I will make changes & see the result.
I am using KDMG20008 speaker for my project. The datasheet of speaker shows graph of frequency in Hz vs. sound in dB (Bode plot). However I am not able to pick the frequency from the plot for which gain is maximum. Can anyone tell me how to calculate divisions on X-axis or directly values of...
Re: How to map COM & segment terminals of segment LCD in order to display 0-9 numbers
Well, finally I got it. The first formula calculates the offset which decides the LCD_DATA register to use. And the second formula decides the bit from that LCD_DATA register to set. Something like **broken...
Re: How to map COM & segment terminals of segment LCD in order to display 0-9 numbers
First want to clear few things. There are CTRLG & CTRLH registers which can be used for displaying data on LCD or one can use DATA register to ON & OFF LCD segments individually.
The schematic mentioned in...
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