Voodoo Main Discussion

[6666]

Hey Surfdetector or others, how warm to touch does your U6 the -5 reg get, I only have the pic and TX and preamp running and I am a bit surprised how warm its running already with more chips to plug in yet ? Its not easy to measure the current being drawn.

[ivconic]

I am not sure if this is what you need but I did a step by step video of loading the hex file onto the PIC with a PICKit3

https://youtu.be/O9V8fmQWXe4

Precisely!
Most of the process i would probably figure out myself... EXCEPT the part with voltage adjustments!
I would most probably wander in the mist around that.
I find your video indeed very helpful.
Thanks!

[ivconic]

Yes, that's it.
I actually used a PICKit4, but both PICKit3 and PICKit2 will work. I've used all three on the PIC18F4520 without any problems.
You can program the PIC directly on the Voodoo board via the ICSP connector, so you don't need the ZIF programming adapter board.

Everything is easy when you have proper tool.
But without it it is nignthmare.
I searched local suppliers, i can buy Pickit2, 3 or 3.5.
No Pickit 4 here.
I am scratching my head and wonder what to order; 3 or 3.5?
...
If you read my "earlythismorningmad" rant; you'll notice that i mentioned strange behavior with 18F45K22 on board and +5v voltage drop.
Is it possible that this is only because of the 18F45K22 on the place instead 18F4520?
When both TL072 are in sockets; +5v drops to 0.3v. When one removed; 4.6V. When both removed; alright 5v.

[surfdetector]

Precisely!
Most of the process i would probably figure out myself... EXCEPT the part with voltage adjustments!
I would most probably wander in the mist around that.
I find your video indeed very helpful.
Thanks!

Glad to be of assistance

[ivconic]

Glad to be of assistance

[Qiaozhi]

Everything is easy when you have proper tool.
But without it it is nignthmare.
I searched local suppliers, i can buy Pickit2, 3 or 3.5.
No Pickit 4 here.
I am scratching my head and wonder what to order; 3 or 3.5?
...

The PICKit 4 is quite expensive, so I would get the PICKit 3.
Don't know what 3.5 is. Never heard of it.

If you read my "earlythismorningmad" rant; you'll notice that i mentioned strange behavior with 18F45K22 on board and +5v voltage drop.
Is it possible that this is only because of the 18F45K22 on the place instead 18F4520?
When both TL072 are in sockets; +5v drops to 0.3v. When one removed; 4.6V. When both removed; alright 5v.

It sounds like it's an issue with the PIC18F45K22. Most likely a configuration problem.

[lamoiz]

Hey Surfdetector or others, how warm to touch does your U6 the -5 reg get, I only have the pic and TX and preamp running and I am a bit surprised how warm its running already with more chips to plug in yet ? Its not easy to measure the current being drawn.

temperature of my workshop 20 .. and measurement of u6 after 5 min of use 24.5 .. measurement with a pt100 on contact.

[lamoiz]

I have a request, but I myself do not have enough knowledge to modify the program. voila, would it be possible to make a new entry, to install a quick toggle trigger between the two modes? without going through the menu .. and validation. I like to go quickly on the beach, and switch from one mode to another quickly will be really appreciable .. if someone has an idea for that .. I am interested. thank you

[ivconic]

The PICKit 4 is quite expensive, so I would get the PICKit 3.
Don't know what 3.5 is. Never heard of it.
It sounds like it's an issue with the PIC18F45K22. Most likely a configuration problem.

There is a comparison test on Yotube. 3.5 allegedly works faster.
I will order model 3. Seems like optimal one for my needs.
...
Yes, it must be. I made two voodoo's and i have exactly the same behavior on both.
...
I located one White's Spectra V3 coil and will obtain it for testing.
Other coils that i have are not suitable.

[ivconic]

Yes, these two PICs (18F4520 and 18F45K22) are upwards compatible pin-wise, but that's about it. The internal registers and config bits are quite different.
I've been comparing the two datasheets, and also found this migration document -> http://ww1.microchip.com/downloads/e...doc/39647a.pdf
The 18F45K20 is much more complicated than this project requires.

The 18F4520 ADCs are enabled in sequential blocks using ADCON1, whereas the 18F45K22 uses ADCON1 to set the positive and negative voltage references. The ADCs can also be enabled/disabled individually using the ANSEL registers (ANSELA to ANSELE).
The T0CON register appears to be unchanged, but T1CON is quite different. Timer1 has many more features than the the 18F4520.
I'm not certain from the datasheet, but it looks like writing to EEPROM is also affected.

I think there are too many differences between the two to just compile this blindly and hope for the best.

Sadly true, proved in practice.
I was keeping this older post on my mind whole night long, last night.

[lamoiz]

for info, here is the 5532 and with the same coil and all the same settings the 4562 ... choose your side ...5532
4562
see you

[Altair]

for info, here is the 5532 and with the same coil and all the same settings the 4562 ... choose your side ...[ATTACH]54032[/ATTACH]5532
[ATTACH]54033[/ATTACH] 4562
see you

It would be expected, since the different slew rate of those components.

[lamoiz]

It would be expected, since the different slew rate of those components.

Yes, it's true! thank you for showing it ..

[surfdetector]

for info, here is the 5532 and with the same coil and all the same settings the 4562 ... choose your side ...[ATTACH]54032[/ATTACH]5532
[ATTACH]54033[/ATTACH] 4562
see you

Thank you for posting the wave forms. It is much more interesting than looking at the Datasheets.
Cheers

[lamoiz]

Thank you for posting the wave forms. It is much more interesting than looking at the Datasheets.
Cheers

thank you Surf, I agree.