XR71 Operation Help

		Quote:			Posted by apocalypto
	Hi, 1) the Battery 12V and what about the intensity (I) in Amper? 2) I need schematic to connect the potentiometers with the pcb 3) The parts list and the equivalent components Thank you for ALL Hi Eugen and electrosoft please answer me

Hello Apocalypto . What version schematic did you use ? Was it this latest one I have posted here ? Also which PCB file did you use ?
Regards.........Eugene

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Hello Electrosoft . If your detection tests are bad you may be using the wrong value of damping resistor and also the diodes you are using are not correct . I am almost positive it is a component issue . A few months ago a big discussion on diodes related to the transmit pulse was discussed on another forum . You should be detecting a small euro coin 30-40 cm in the air [minimum] not 15 cm . I can check for a double sided PCB but in the mean time you can do some trouble shooting with your existing circuit and re-check your schematic . T1 can be IRF-740 , R5 damping resistor can be 680 ohm 1 watt resistor . Diodes VD1,2,3,4 can be 1N4148.
HH..........Eugene


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		Quote:			Posted by hesamavr
	Dear Eugene52 You forgot to answer my previous post. I ask it again here. You posted these two schematics of XR-71. They have some differences in some parts and values. which schematic is better and correct, furthermore which of them has more sensitivity? Best Regards [/quote Hello Hesamavr . Use this schematic I posted here below !!! Version 6.0 from last month . It works very good and has been tested by many builders . The PDF file of "XR71" is an old schematic and a few parts are now obsolete . Build the Delta Pulse !!!! If you build the circuit and coil correctly it will detect very deep , depending on the targets size . The Delta Pulse is a Deep-seeking PI for Relics , Caches , Coins . Again , use this schematic here !!!! Best Regards........Eugene Linkback: You are not allowed to view links. Please Register or Login http://www.thunting.com/smf/index.php/topic,2887.msg57501.html#msg57501

		Quote:			Posted by Eugene52
	Hello Electrosoft . If your detection tests are bad you may be using the wrong value of damping resistor and also the diodes you are using are not correct . I am almost positive it is a component issue . A few months ago a big discussion on diodes related to the transmit pulse was discussed on another forum . You should be detecting a small euro coin 30-40 cm in the air [minimum] not 15 cm . I can check for a double sided PCB but in the mean time you can do some trouble shooting with your existing circuit and re-check your schematic . T1 can be IRF-740 , R5 damping resistor can be 680 ohm 1 watt resistor . Diodes VD1,2,3,4 can be 1N4148. HH..........Eugene

hi Eugene my deltapulse now is more sensitive i changed the irf to 740
with 32cm coil i detect coin easly to 30 cm and cola can to 50cm now i have to remake my 1m/1m coil thank you again
br!

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Dear Eugene52

Thanks for your reply.

I have other questions :

1 - please specify the voltage of C32 in the schematic, I mean 4700uF capacitor.

2 - Can we use another Diode instead of STTH1210D ?

3 - Please specify the diameter of Coil's wire.

4 - What will happen if we use the 40cm Coil instead of 110cm*110ccm ?   

Kind Regards

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