03-08-2016, 01:49 PM
Well here is one thats got me beaten.
I wanted to be able to check a draw full of crystals so i got one of the kits from china £6.91 http://eu.banggood.com/Wholesale-Warehou...59592.html
spent 30 mins building it but on plugging in a test crystal 8.667238 the reading i got was 11.116 ?
checked another two and again the reading bares no relation to the marked value.
this device can also be used as a frequency counter this part works well (see pic )
the circuit only shows basic connections to the PIC chip .
on the good side it does show if the crystal is dead or drifts .
but there we are it has beaten me
Rob T
I wanted to be able to check a draw full of crystals so i got one of the kits from china £6.91 http://eu.banggood.com/Wholesale-Warehou...59592.html
spent 30 mins building it but on plugging in a test crystal 8.667238 the reading i got was 11.116 ?
checked another two and again the reading bares no relation to the marked value.
this device can also be used as a frequency counter this part works well (see pic )
the circuit only shows basic connections to the PIC chip .
on the good side it does show if the crystal is dead or drifts .
but there we are it has beaten me
Rob T
if its made by hand it can be repaired by hand
