Original project from: https://oshwhub.com/liyichuangeda/tong-yong-shi-jing-zheng-ce-shi-yi
I just modified the PCB and some components appropriately. It should be smaller now. I have canceled the female socket and can just insert it directly into the hole when needed.
It should be noted that the Power light is a blue light and the DATA light is a red light. If they are reversed, it will have no effect:)
Only crystal oscillators starting with M can be tested, not those with K frequency, such as 3M, 8M, 12M, etc., but not 32.768K. I can’t measure the value, I can only test whether the crystal oscillator can be used:)
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