Treasure Hunter P.I. Mark Paul's firmware
I have built the detector as detailed on geotech (seems a lot has gone misssing there)
Marks firmware assembles OK. And the detector runs. I used the PIC16F84A as the 16C84 is hard to get. Clock is at 4MHz.
Using the re comended coil, the coil drive circuit uses too much current and pulls down the battery voltage st oping the uP
Using a coil with a lot of turns and a high resistance all features of the detector work fine but for obvious reasons the power
is too low. The pulse width is far too long and is the problem.
Have others built this detector with Mark's firmware version? Were there later modifications to the design? I have found a few errors in the schematic but the board is OK. I have researched this design here and everywhere I could for weeks now. I have found very little still exists??? Can anyone shed light on this.
Regards Eric
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« Last Edit: May 31, 2015, 07:52:10 pm by homefire »
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