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Yes I have a pullup resistor of 4k7, but thanks to your advice I noticed that on of the pins has been badly connected.
This makes sense
Thread solved thanks Martin
Hello.
When powering up my Atmega328P the reset pin (pin 29) is pulled down, so the chip stays in a reste mode.
Strange is that this happens not allways.
I can force the chip, pulling the reset Pin Hi, when connecting 5V to pin 29.
This behavier is with, or without a serial programmer connected...
Hello
I have Piklab on my Linux KDE installed.
I closed the Project Manager and also the Compile Log window and I can't find a way to get them back.
All the Sourceforge info about piklab is down and I even reinstalled the entire program, compiled from scratch but no way.
Is the program still...
Hello.
I'm try to make a simple current limiter circuit using a P-FET, a 2N3820.
With some FET's the circuit works, with other not.
With the values used at the attached schematics the current limits about 4,5mA.
But as I mentioned above some FET work other's wont. (I use only the 2N3820)...
Right, I have to look more carefully to the data-sheet. I try to do a design with the MAX4475, it seems to by a good ic for audio.
Thanks for the advise Martin
Virtual GND question.
Hello, I made a small preamp using an OPA336. The circuit is powered with 3V
and to test the circuit I use a Wave-Generator with 600 Ohm output impedance.
Here is the schematic:
If I connect a Square-Wave (1kHz, 100mV) and watching the output with an
Oscilloscope, I see...
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