28-10-2018, 02:15 AM
The cheap price for these is basically because almost everything is done by a single PIC microcontroller, typically a 16F628A.
The 500MHz version is essentially the same as the 50MHz one with the addition of a prescaler.
They have been around for maybe 10 years or more, so are tried and tested. Main problem is with the reference frequency which is the PIC's clock - this is a cheap crystal with a ceramic trimmer, so don't expect huge accuracy or temperature stability...
It's excellent value for what it is.
The 500MHz version is essentially the same as the 50MHz one with the addition of a prescaler.
They have been around for maybe 10 years or more, so are tried and tested. Main problem is with the reference frequency which is the PIC's clock - this is a cheap crystal with a ceramic trimmer, so don't expect huge accuracy or temperature stability...
It's excellent value for what it is.
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