Hi,
Sorry for a beginner electronics question but i just dont get this.
On page 149 of inside the metal detecto there is an N mosfet coil pulse circuit.

I have made the circuit on a few simulators and the electricity just flows through the diode to groud making the mosfet pointless.
For example, here is it simmed on falstad:
http://www.falstad.com/circuit/#%24+...625E-5+5+-1%0A
Is this right?
It works if i move the diodes up in line with the coil and damper and dont connect them to ground.
Is this a mistake of the book or am i missing something?
Thanks
Sorry for a beginner electronics question but i just dont get this.
On page 149 of inside the metal detecto there is an N mosfet coil pulse circuit.

I have made the circuit on a few simulators and the electricity just flows through the diode to groud making the mosfet pointless.
For example, here is it simmed on falstad:
http://www.falstad.com/circuit/#%24+...625E-5+5+-1%0A
Is this right?
It works if i move the diodes up in line with the coil and damper and dont connect them to ground.
Is this a mistake of the book or am i missing something?
Thanks
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