PI CHIP

[moodz]

The V300 now updated to include an SPI port.

The SPI port is for bolting on the 24 bit ADC's and other goodies.

!!!!note two of the LCD control lines have moved See pins 35 and 37 on the 4011 !!!

Hex and schematic below.

moodz.

V300_20120203.zip

[hdphilip]

V300

is the v300 hex files posted somewhere? i can't seem to find them,

Philip

[Qiaozhi]

Correct me if I am wrong but I think it is this diagram. Sorry about size Carl every time I try to shrink it the image is useless. I will not get upset if you delete this post.

In cases where the image is very large, but cannot be reduced in resolution without losing quality, post the file in either zip or rar format.

[Dr Vel]

Correct me if I am wrong but I think it is this diagram. Sorry about size Carl every time I try to shrink it the image is useless. Thanks Qiaozhi a very good idea, I removed it. Makes me crazy to have to scroll side to side to read a page, especially if I cause it. In lieu of image that was here, see the zip Qiaozhi posted below.

I notice everyone asks for hex files but is it possible Moodz can share the commented source? I realize He may be keeping it proprietary but if not it would be nice to be able to understand and experiment with the program.

[6666]

Hi Moodz
thanks for the update on the V300
great work
just one thing is it possible to get the full size picture please
when i zoom in to see the details of the connections the picture breaks up

Happy new year to you to
6666

[moodz]

v300 UNIPI update

Version v300 now replaces v230 ( v230 only supported on dspic30f4012 ).

v300 uses the dspic30f4011 chip and provides 3 PWM and 4 sample pulse outputs as well as 4 press buttons , rotary encoder, serial interface ... yada yada.

The pulse drivers are now on board and tested and run off an independant supply ( upto +50 volts if required ) There are seven pulse drivers ( 3 pwm + 4 sample ). Each driver can be fed with a different voltage if required.

The code is currently under revision to support VLF detector mode and will be called the UNI-PIGSL ... by changing the frontend board you can swap between VLF and PI

The VLF frontend is being tested now.

happy new year ... moodz.

[6666]

Thanks Moodz
cheers
6666

[moodz]

Hi moodz
was this ever proven to be a working design ?
what type of "c" is on the output it says 10uF ?
which way should it go if its an elecro ?
thanks
6666

Hi 6666 .. well its based on the surf PI .... which is a working design .. however it was more a demonstration of how to use the tx and sampling signals from the UNIPI chip.

The cap should be bipolar and you could even increase it to something like 220 uF since the signals we are passing here are very low frequency.

I would not call it a good design.

moodz.

[6666]

The UNIPI chip is not just for differential front ends .... here is a simple cut down "surf pi" front end .....

there are only 4 connections required from the front end to the UNIPI chip.

TX
Sample 1
Sample 2
ADC in.

For audio out just use a 1k resistor in series with 16 ohm headphones .... you will hear clicking like gieger counter with no target. Freq will increase with target.

moodz

[ATTACH]15952[/ATTACH]

Hi moodz
was this ever proven to be a working design ?
what type of "c" is on the output it says 10uF ?
which way should it go if its an elecro ?
thanks
6666

[moscadondres]

Thank you micktv,thank you moodz for your work.

[mickstv]

[quote=moodz;135609]

This one isn't really an issue the control does still work.

Hows the blocking fet electronics going ?

Mick[/quote


see http://www.geotech1.com/forums/showp...7&postcount=31

update in Model T circuit thread.



This was the main "blocker" to getting the rest of the signal chain going.

Paul.

Thanks i'll go and have a look see.


Mick

[moodz]

[quote=mickstv;135594]This one isn't really an issue the control does still work.

Hows the blocking fet electronics going ?

Mick[/quote


see http://www.geotech1.com/forums/showp...7&postcount=31

update in Model T circuit thread.



This was the main "blocker" to getting the rest of the signal chain going.

Paul.

[mickstv]

Hi moodz,
How do you connect the 10Mhz crystal to the 30F4012,thank you for reply.

Hi moscadondres, Paul wrote how to a few posts ago, but any way this is what I did...

1 Remove satlock button from pin 10 and remove the 10k resistor from pin 10 of the micro.
2 Fit 10Mhz crystal between pin 9 and 10.
3 Get two 22pf ceramic capacitors and solder one end of each capacitor to pin 9 and pin 10, then the other side of the capacitors solder to ground.



Mick

[moscadondres]

?

[Carl-NC]

The only think I did notice which isn't really a problem is when you turn the rotary encoder fast it seems to some times stop or reverse in number change but at a slower pace it's fine.

You're turning it faster than the software can keep up.