CHANCE PI CIRCUIT DIAGRAM NEEDED

[kt315]

The CHANCE is a microprocessor controlled detector but the source code for it is not available from it's author

yes, it is rule of Andy. he does not give the source code, but HEX given always is free and is NOT a 'demo'.

[baum7154]

Was unable to set any parameters....Even lowering the sensitivity had no effect.

Will try winding me own choke to see if any difference.

I kept on getting a constant buzz/pulsing noise every couple of half seconds not from the speaker output but the coil itself and it is the 0.8.4 software from memory.

Will revive this project considering some people have some positive results and hopefully a latest programmed chip is available from Silverdog to try.

I am confident that it is not Electronic component fault related.

I did reduce as much EMI in surronding workbench so that can be eliminated.

Thankyou,

Regards Sid

When you get your CHANCE upgraded you will still find that there will be some much reduced 'chatter' in some situations due the explanations contained in the paper below:

http://www.nuggetshooter.com/article...Idetector.html

If you have not already read this it gives an excellent description of the PI detector in operation and it's vulnerabilities as well as those of the VLF detectors.

Regards,

Dan

[sido]

When you get your CHANCE upgraded you will still find that there will be some much reduced 'chatter' in some situations due the explanations contained in the paper below:

http://www.nuggetshooter.com/article...Idetector.html

If you have not already read this it gives an excellent description of the PI detector in operation and it's vulnerabilities as well as those of the VLF detectors.

Regards,

Dan

Thanks Dan.

I have not tried the detector away from my home EMI infested area.

Random pulsing may be due to powerlines and other local interference being injected .

When i get a chance I will take detector away from the City and try it in a reduced EMI country area.

Here is Australia we have 240 Volts 50 Hz in our homes as apposed to America 110 Volts at 60 Hz.

Could be our powerline frequency of 50 Hz causing my Chance to pulse in a constant sequence and wiping out any controls of the detector.

Another major source of Interference we have here is the Pay Tv cable network mounted on our same Electricity Power Poles outside our homes above ground Adds alot of Interefernce to the HF Radio spectrum also.

Regards Sid

[baum7154]

Thanks Dan.

I have not tried the detector away from my home EMI infested area.

Random pulsing may be due to powerlines and other local interference being injected .

When i get a chance I will take detector away from the City and try it in a reduced EMI country area.

Here is Australia we have 240 Volts 50 Hz in our homes as apposed to America 110 Volts at 60 Hz.

Could be our powerline frequency of 50 Hz causing my Chance to pulse in a constant sequence and wiping out any controls of the detector.

Another major source of Interference we have here is the Pay Tv cable network mounted on our same Electricity Power Poles outside our homes above ground Adds alot of Interefernce to the HF Radio spectrum also.

Regards Sid

Yes, in my basement shop my detector will not operate properly with my old 32" CRT TV turned on in the room. I also always turn off all flourescent lights.

Probably the biggest improvement you will see will be from the V1.2.1 software upgrade. I remember my detector frequently beeping with the old 0.8.4 software. When you have the new software installed try to get your damping resistance adjusted to allow the lowest possible Guard Interval setting of '10'. This may not be possible if the coil is not 'fast' enough, but minimizing the Guard Interval operating point will be beneficial.

Good luck,

Dan

[reza vir]

please upload program for ic micro avr?

[baum7154]

[ATTACH]26198[/ATTACH]

please upload program for ic micro avr?

The download that you seek is on this site, titled "1.2.1" dated 18/08/2011:

http://fandy.hut2.ru/Chance.htm

You can then load up your ATMEGA chip.

[daverave]

can somebody who has never programmed an atmega chip programme it....is there any basic hardware one can buy ?????

[greylourie]

Usbasp programmers go cheap on ebay, take a couple of weeks from China. On the internet there is loads of info/tutorials on using and programming with such a tool. I see at the bottom of page, ( fandy.hut2ru/Chance.htm ) the fuse settings are listed.

[daverave]

ive placed an order on ebay for a usb programmer for this atmega8 but how do i connect the cable connector from the usb programmer to the atmega8 chip ???? sorry to ask such questions but im new to this programming

[woodbob123]

Don't be sorry plenty of us will be glad to find out with having to ask "another" dumb question. Thanks (ask about pic's next)

[daverave]

can atmega8 be programmed while connected to the chance pi pcb ???? can anyone pls advise

[WM6]

can atmega8 be programmed while connected to the chance pi pcb ???? can anyone pls advise

Yes, it can be programed and reprogramed (upgraded), via X2 port (marked at PCB).

[daverave]

i have just ordered a cheap atmega8 usb programmer from ebay china....can i just use the plug on the end of the programmer cable to fit directly into the x2 port on the chance pcb....will it be configured correctly with the programming pins of the atmega8 on the pcb ????

[WM6]

As a rule yes, but you need to check your programmer connector configuration (ask producer for programmer schematic) with this before:

[Bardia]

New pcb of the chance

Hi my friend i have a new pcb and change the etc