Author Topic: USB AVR LAB - AVR programmer (Read 3204 times)

akhen · « **Reply #20 on:** May 10, 2011, 10:22:54 PM »

anliit

...

Philippine Electronics Forum · « **Reply #20 on:** May 10, 2011, 10:22:54 PM »

RiDdLeR??? · « **Reply #21 on:** May 14, 2011, 04:36:29 PM »

katatapos ko lang ng pcb design

Philippine Electronics Forum · « **Reply #21 on:** May 14, 2011, 04:36:29 PM »

Ikasamoko · « **Reply #22 on:** May 14, 2011, 05:03:25 PM »

kainis ang maldita na to..SMD ba naman..Grrrr.....

Baka may EXTRA ka na SMD dyan..

pwede ko itrade katawan ko..

Philippine Electronics Forum · « **Reply #22 on:** May 14, 2011, 05:03:25 PM »

RiDdLeR??? · « **Reply #23 on:** May 14, 2011, 05:38:31 PM »

yung mga 5% resistors lang, 2 crystal caps at 3.3V regulator lang ang smd, the rest TH na ... have to work with what I have.

Hanlubgkat pa ako kung may mga presensitized pcb pa ako para matapos ko na ngayong gabi ito.

Philippine Electronics Forum · « **Reply #23 on:** May 14, 2011, 05:38:31 PM »

RiDdLeR??? · « **Reply #24 on:** May 14, 2011, 11:03:04 PM »

Eto na yung finished pcb ready for drilling.

Philippine Electronics Forum · « **Reply #24 on:** May 14, 2011, 11:03:04 PM »

Ikasamoko · « **Reply #25 on:** May 15, 2011, 12:12:44 AM »

nyahaha...may hairline..

RiDdLeR??? · « **Reply #26 on:** May 16, 2011, 12:28:31 AM »

Below is the semi-finished USB AVR LAB using mix TH and SMD components. There was a fatal flow in my PCD design ..... I forgot to include a jumper header for the reset and I forgot to connect to ground pins 8 & 10 of the IDC connector, also its missing one precision resistor needed for the oscilloscope function, I bought a 33K but got a 39K instead ... hirap talaga pag minamadali.

Anyways, below is version 2 PCB with the corrections.

Ikasamoko · « **Reply #27 on:** May 16, 2011, 09:24:47 AM »

Bwahahaha....excited kasi ang impakta...

congrats nyway...ganda ng pagka etch...

sis san ka kumuha ng mga SMD mo?

solder side pls ng finish product..

RiDdLeR??? · « **Reply #28 on:** May 16, 2011, 04:28:00 PM »

Eto na siya --- a glorified USBASP.

Yung mga SMD components, meron lahat sa e-gizmo. 0805 gamit ko na smd reistors at caps.

Eto na yung finished pcb after soldering .... medyo madumi pagkakagawa ko kasi late night/early morning ko ginawa.

Eto naman yung finished project: Exactly the same as the first version but with the additional jumper header and prebiously missing precision resistor.

Pinag aaralan ko pa mga features pero maganda to kasi may built-in clock generator (using pin 3) so can can easily revive dead avrs with wrong clock settings. Di ko na kailangan ng avr fusebit doctor.

Ikasamoko · « **Reply #29 on:** May 16, 2011, 04:52:11 PM »

^^ owz? di nga?

you mean FUSEBIT?

RiDdLeR??? · « **Reply #30 on:** May 16, 2011, 07:04:06 PM »

I mean atmega fusebit doctor pala .... kasi the spien fusebit cannot be changed anyway using isp programming, ang parating problem lang eh yung clock settings.

Ikasamoko · « **Reply #31 on:** May 16, 2011, 09:05:53 PM »

aba..kaya ba HVPP at HVSP?

_basura_man() · « **Reply #32 on:** May 17, 2011, 10:07:19 AM »

subscribing...

Ikasamoko · « **Reply #33 on:** May 17, 2011, 01:11:33 PM »

Quote from: alyas on May 16, 2011, 04:28:00 PM

Eto na siya --- a glorified USBASP.

Yung mga SMD components, meron lahat sa e-gizmo. 0805 gamit ko na smd reistors at caps.

Yun! maka order nga ng SMT..

Ikasamoko · « **Reply #34 on:** May 21, 2011, 08:50:35 PM »

Bakit kaya 3.3 volts to? yung USBasp direct naman 5volts?

tiktak · « **Reply #35 on:** May 21, 2011, 09:13:58 PM »

^balak ko gawin ito sa 5V, sa pagkakaalam ko yung 3.3V version ata kasi yung ginamit so dapat pede sya sa 5V

RiDdLeR??? · « **Reply #36 on:** May 21, 2011, 09:32:29 PM »

Yung D+ and D- has to be 3.3V level talaga as per usb spec. But yung supply sa chip, either 5V or 3.3V pwede if the chip supports 3.3V levels also. Atmega8L kasi yung gamit na chip kaya 3.3V yung supply but optional naman yun.

Yung ginawa ko, instead of using zener and transistor for the 3.3V supply, gumamit na lang ako ng 3.3V LDO regulator tapos may jumper selector to choose either 5V or 3.3V. Hindi kasi ako sigurado kung saang level naka-calibrate yung ADC ref ng oscilloscope function, kung sa 5V or 3.3V.

Also, you will still need 5V to program older AVR chips na 5V only, lahat yata kasi ng bagong avr chips eh 1.8V to 5.5V na ang VCC kaya ginawa niyang 3.3V yung basis ng supply ng USB AVR LAB..

Ikasamoko · « **Reply #37 on:** May 21, 2011, 09:36:50 PM »

yung +V TARGET ito yung supply ng AVR na program mo?

RiDdLeR??? · « **Reply #38 on:** May 21, 2011, 10:40:00 PM »

Ang supply ko is yung +3V or +5V

Ikasamoko · « **Reply #39 on:** May 21, 2011, 11:18:21 PM »

Here is my version..

Philippine Electronics Forum · « **Reply #39 on:** May 21, 2011, 11:18:21 PM »

Author Topic: USB AVR LAB - AVR programmer (Read 3204 times)

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