Originally posted by Qiaozhi
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I think in this instance after listening to your advise its not worth attempting to build the original because of the main delay not been able to drop low enough which is the same problem and disappointment todate I had been experiencing with the mini pulse 3.
Can see you have done your homework with this design and the fact you have got down to the magic 10us (Gold detection) and got the SAT speed lower its telling me its worth at least one build.
Also component count and overall cost is quite cheap and cannot see much problem for up and coming hobbyists/engineers.
Your correct far as PCBs Its not financially worth doing DIY,but in reality neither are these projects on here, If you work out time spent from first initial interest to completion of a fully working detector in money terms its not viable because £ Per hour compared to repairing customers equipment in the same workshop, could at the very least buy me a top of the range Gold mask with a SEF coil.
With this project unless someone here is willing to spend the time doing single sided layfiles will do as you advise and buy ready made PCB.
Still have Two Silverdog ITGSL boards here which were never used if anyone wants to make me a reasonable offer.
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