Faulty generic 5V 2A AC adaptor ('wall wart')

[stj]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

right, some advice about the kit before you build it.
get a 16MHz crystal to replace the 8MHz one,
get a 10pin box-header (2x5) like the ones used on motherboards for internal usb connectors.

and get a usbasp clone on ebay to program it.
http://www.ebay.com.au/itm/281783798957
i'll sort you the software.

[tiff_lee]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

Nice one thanks for the pointers.

I assume the 10 pin box header is to connect the programmer to but where on the pcb do you connect the header itself?

[stj]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

you have to find some way of fixing it to the edge or something, then it's about 6 wires to the bottom of the cpu socket.

i'v seen it done, if i remember where then i'll link foto's

here is the hardcore answer btw.
you could use a 6pin, but then you need an extra adapter to connect to the programmer.

[tiff_lee]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

Parts on order but it's china so will be a month no doubt.

Thanks for the images, not sure on that 10 pin one though. It has TXD & RXD on pins 4 & 6 and looking at other pin outs (including images on ebay for other programmers) pins 4 through to 10 are all ground.

http://cryoarchive.net/wp-content/up...asp_pinout.png

[stj]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

ignore the txd & rxd - they are for some debug tools - not related to progamming.
use the 6pin as reference of needed pins.

your link is obsolete btw, designs change.
i'm linking the schematic of the programmer.

[stj]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

here you go.
http://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg854124/#msg854124

[stj]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

and this:
http://www.banggood.com/Supporting-S...-p-989949.html

[tiff_lee]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

Oh a case thanks saves me making one, plus with minor modding I can mount the 10 pin socket. I notice it slims down the zif socket.

On the colour screen one I have there is 3 test points labelled K A A although not too sure what they are for, although I think its for something to do with zeners given that if you put a resistor in there it gives results as if it's a zener.

Edit: My god there is so much 'stuff' on that website I could buy purely for gadget value it's scary

[stj]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

you mean BangGood? yea i know - i can spend hours browsing that site!

the KAA is Kathode(lol) Anode, Anode - it's the zener tester and generates a relativly high voltage.
i also see that model has the InfraRed sensor and decoder in it - so it must be using the Markus Reschke AKA madires software.
that's mostly his thread i linked at EEVblog

[tiff_lee]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

I have browsed though the eevblog thread before but it's so huge you could spend an afternoon and then some reading it all.

I have no idea what you would actually use the IR sensor for, I mean I realise it detects IR but it what circumstance that is used? it does pick up something from my halogen desk lamp though and spits out a user & data code!

[stj]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

for testing remotes - it decodes the data on the display!

btw, here is another long thread for you!
https://www.mikrocontroller.net/topic/248078

[tiff_lee]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

Oh yes all those IR codes and what not you can use to reprogram remotes, cool not that I think ill ever use that function personally.

More reading! thanks

[Behemot]

Re: Faulty generic 5V 2A AC adaptor ('wall wart')

Oh man, 50 bucks for that open-source thing every chinese is building in their garage?

If I buy any switching power supply I change cap on site if they are NOT well know good brand name caps
This is a 5 volts @ 5 amp power supply
It had some green colored sleeve that had printed " Low ESR " on them no brand name
I know this a hack job how ever it had 2200uf@10 volt caps were 12mm Dia and 17mm tall

KYA 2700/6.3 D10x20 mm would be just OK, or KYB 2200/6.3 with lower ESR and longer rated endurance.