PICKit 2 + little extra

Rasprava o PIC mikrokontrolerima, PIC projekti i drugo vezano za PIC-eve...

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en1di0n
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PICKit 2 + little extra

Post by en1di0n »

They say that presentation is everything. And really I don't feel like typing now (look @ t++). But so, I want to share a product of my some would call it insanity with you.

Some will say that extra feature is not necessary, but Clone was just not enough of PK2 for me. :-)

http://www.facebook.com/album.php?aid=4 ... 62c470ffea

And now, switch to native, jezik :-)

Peace, Love, Unity & Respect to all.
en1di0n
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Re: PICKit 2 + little extra

Post by trax »

Looks great. It would be even better with some TXT details :-)
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Re: PICKit 2 + little extra

Post by en1di0n »

Sepcs:
  • klasični PICKit2 prema shemi iz user manuala.
    SEPIC converter
    battery & battery charger
Ideja koja stoji iza izrade ove varijante pk2 je da Programmer-to-Go funkcija bude apsolutno autonomna. Bez obzira da li meta ima svoje napajanje ili ne. Naravno bez potrebe za nekim eksternim napajanjima kako je to opsano u Programmer-To-Go User Guide.

Jedini logićni izbor je bio staviti bateriju. Ali postavljalo se pitanje koju i kakvu. Jednostavno rješenje bi bila 9V baterija i recimo linearni regulator napona (7805). Ali zašto jednostavno kad može biti i kompliciranije? I naravno trebalo je zadovoljit moju opsesiju sa SMPS napajanjima.

A sad neka sheme i ostalo govore same za sebe. Ako tko ima kakvih pitanja, biti ću sretan ako mogu dati odgovor.
PK2_enhanced.rar
Shema i PCB
(87.08 KiB) Downloaded 247 times
Folder sa slikama.
http://www.box.net/shared/c5lyyhyvqg
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trax
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Re: PICKit 2 + little extra

Post by trax »

This PDF is password-protected. Please upload a non-secured version to see a preview.
:(
Nesto ti ovaj PDF ne fercera...
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Re: PICKit 2 + little extra

Post by en1di0n »

Riješeno. Zabunom sam imao postavljeno da mi na svaki dokument koji napravim stavlja protekciju.
Ako itko napravi ovu varijantu, zbilja bih volio vidjet rezultate :-)
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Re: PICKit 2 + little extra

Post by Kizo »

Au, ovo je mnogo dobro.
Kako je riješeno punjenje baterije? Dali se svako malo nadopunjava kad sa priključi na USB ili se puni tek kad kapacitet padne ispod određene granice u svrhu produžavanja životnog vijeka dotične?
Koliko su te izašli delovi?

edit: ni meni ne otvara pdf, postavi ponovno.
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Re: PICKit 2 + little extra

Post by en1di0n »

Punjenje baterije rješava MCP73855. Dijagram toka možeš vidjeti ovdje http://www.box.net/shared/u7je1m66f3
Za moj slućaj.
V_UVLO = ~4.4V
V_REG = 4.1V
V_PTH = 2.8V
V_RTH = V_REG - 0.2 = 3.9V
I_TERM = 32mA
I_REG = 400mA

Puni je kad god napon padne 200mV ispod 4.1V, da li je to zdravo za životni vijek baterije ili ne, zbilja ne znam.

Izračunao sam troškove unutar nekih 200kn (-/+ 30kn) s time da u cijenu nije uključena baterija koju sam već imao.
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