It Started With a Hardware Limitation I have been using Quectel GNSS modules in my designs for a while. They are reliable, well-documented, and the support ecosystem is solid. But the module I had been using had one problem that I kept running into: no external antenna support . For most projects that is a minor inconvenience. For a marine vessel monitoring and control system , it is a non-starter. A vessel hull blocks sky view, antenna placement is critical, and the difference between a clean fix and no fix at all often comes down to whether you can mount the antenna where it actually has line of sight. An integrated antenna in a sealed enclosure below deck simply does not cut it. So I went directly to Quectel. The Conversation With Quectel I reached out through their official sample request channel. I was not expecting much — most component manufacturers have a standard process: fill out a form, wait, get a few uni...
I am waiting for my PIC micro controller board and this is my first time that i am using an original development board. All these days i have used my own designed programmer and test board. But once i changed my developing terminal for a laptop, it did not work. cause the serial port peak voltage from laptop is 7.5V which is useless for programming. At least 12.7V or 13V is needed to program a PIC micro.
My old programmer still works in PC . If anyone interested on it i can give you an schematic of it.
My old programmer still works in PC . If anyone interested on it i can give you an schematic of it.
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