Hi All,

I am planning to build a pickit2 clone from MCU Hobby - Articles: Building a PICkit2 clone.

Only thing is i could not able to find some of following components

680uH - Do we have any equivalents or can i make coil of my own. How can i make?
BAT85
BS170
IRF9Z34
- Is the any equivalents of the above which easily available india

I already have jdm programmer which is working fine. So i can programe the 8550 easily

Thanks,
Robotsmani

 

Hi,

This might help..

Not sure about the choke, but 470 uh also works fine

Attached Files

pickit2_Lite.pdf (44.6 KB, 203 views)

 

Thanks Wp100..

That's really a cool circuit. In this i have seen some FBT1(ferrite bead), what it is? And the choke 470uh or 680uh, i don't think so i will get it here. Can we make some thing with same value or can we take some coil from CFL lamp and modify it. How can i get the inductance value, what are the calculation, Any Idea?

Thanks,
Robotsmani

 

Its the lite version of Bill's blueroomelectronics - Smart Kits Build Smart People Junebug. Go to this website and check the Junebug User Manual. Its a PICKIT2 SE compatible programmer.The inductor is for the Vpp pump.

I think the values Bill said were usable were 520 to 820uh.

__________________
Syed

 

Hello Robotsmani,

I've read some post in this board, you can try to use inductor from old pc motherboard. It's in form of toroidal in 0,8cm diameter. I cannot find the inductor, but luckily got it in form of 1W resistor (Vishay product - Inductors - Vishay ) from my mail order shop.

For FB, I was using an inductor in toroidal form, diameter/length about 0,4cm.

 

You don't even need a ferrite bead The pickit2 doesn't have one my junebug doesn't have and the two clone I made do not have one and all work fine. As for the choke 470uh or 680uh works I have got them from old phone caller ID

__________________
Burt
http://mybe80be.com
http://stores.shop.ebay.com/mybe80be__W0QQ_armrsZ1

 

very easy to make one
use a drum core with tags- by salvaging the indcutors locally sold. use 40 swg copper wisr
make around 130 turns
to 150 turns.
solder the wires to the tags present

dip it in molten bee's wax. use it
components-- BS170 is locally sold-- otherwise use 2N7000

IRFZ34-- use IRFZ44
BAT85 -- use 1N5819, OR 5822

For your own interest, try to make an LC meter from googling for LC Meter2 by Phil Rice
it works well
once made, it helps you make good coils of known accuracy

__________________
Regards,
Sarma.

 

That could come in handy here a link A Surprisingly Accurate Digital LC Meter
Thanks mvs sarma

__________________
Burt
http://mybe80be.com
http://stores.shop.ebay.com/mybe80be__W0QQ_armrsZ1

 

Later, Mr Phil Rice made a new version using 16F628 and using its internal comparators, thus avoiding LN311
perhaps you might have seen that "LC Meter2" at
Digital LC Meter Version 2

I made one . It works well, Thanks to Phil Rice (VK3BHR) of Australia.

__________________
Regards,
Sarma.

 

I dont have a ferrite bead on my Junebug as well and it doesnt cause any problems.

@ Sarma, Is the PCB layout available on the site ready to print with respect to Pad sizes?

__________________
Syed

 

Yes, provided the type of relay they used is available with you.

__________________
Regards,
Sarma.

 

thanks all,

Building a LC meter itself a 100mh inductor required :-(
Let me check with the local shop for the inductors. otherwise i need to find out from salvage computer parts.

Let's hope i can get something this weekend...

Thanks,
Robotsmani

 

call it 100micro H( 100uH)
these coils are very much available across market in the shape of 1/2 watt resistors. marked brow black and brown followed by silver.

More important is the 1000pF or 1nF caps 2 off with a low tolerance like 2%. these are sold by Farnell, as box caps( polyester type).
On the overall this meter is very handy if are interested in RF filed as Hobby. similarly a frequency counter by IK3OIL.

__________________
Regards,
Sarma.

 

Robotsmani If you need that choke you can get one out of almost any old cel phone
car chargers and it also has a good regulator that can step up low volts to high
or high to low I get all of them I can find just for them two parts.

__________________
Burt
http://mybe80be.com
http://stores.shop.ebay.com/mybe80be__W0QQ_armrsZ1

 

Thanks mvs sarma and be80be...

I got the inductor(680uH) in the market in the shape of 1/2 watt resistors :-) :-) . only i could not able to find IRF9Z34 mosfet. Is there any available equivalents? can i use bs170? There is no IRF kind of mosfets are available in the market. Other all parts are ready except the IRF9Z34. Help me...

Robotsmani