Последние новости
09:18, 14 марта 2026Россия
。搜狗输入法是该领域的重要参考
ВВС США купят броневики для ядерных «Минитменов»02:00，详情可参考手游
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After a bit of poking, I found what looked to be a textbook quartz crystal resonant curve, but centered at 20 MHz rather than 10. This suggests there’s a divide-by-two in the driver circuit, perhaps to improve the duty cycle to a more perfect 50%. But more importantly, it suggests that neither the crystal itself, nor the electrical connections between it and the package (since I was probing at the package contacts and not the surface of the quartz), were the source of the failure.