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Hi
Please help how to read/send an email. I always get the same response: "+POP3IN: 62". Which means DNS resolve error. Im doing everything according to manual (command history attached)
I have tried 3 different service providers, 3 different email servers, and 2 different SIM800 modules with...
I made a circuit of what you suggested. The first image I reolaced the 1/4 wave stub with ESD low capacitance protection, that you can place directly to signal trace:
But what you proposed is if I would replace that ESD protection with schematic like this?
Is the scematic what you ment? Also...
Im designing a lightning protection circuit for GPS module that works off 3,3V and antenna line is used to feed antenna with 9V DC through bias tee.
I have a gass tube discharge(GDT) element in antenna cable that should take the voltage down to about 90V, but I need help designing the low...
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