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Messages - MickM

31
General discussion / Re: Do you think Raspberry Pi and Arduino is overhyped
Hi;
  I use the Arduino as a proto tool, then build a pcb with an AVR and avr-gcc.
I have a Mega2560  a Sarduino-644p, and a Sarduino 1284p
Now that the Beaglebone Black has come out I will not be buying a Rasberry Pi.

I just wish that Fritzing thing would die quickly.

Mick M
37
USB serial LCD backpack / Re: LCD backpack GND pin: where to connect ?
Hi sormariano;
  here is the data sheet for that display:
http://docs-europe.electrocomponents.co ... 0b97a0.pdf

Are you sure that you have identified pin 1 correctly?
Page 13 shows the connector.
With the display facing up, and the connector on the left.
Pin 1 is lower inside.

If you have it backwards then you connect the backlight LED directly across the power lines.
With no resistor the fuse will blow.

The black boxes mean that the contrast pot needs to be adjusted.
Usually very near to one end of it's travel.


Hope that this helps.

Mick M
39
Project logs / Re: PAW22 TraId - Transistor type & pinout identifier
Hi Mats;
  very cool tool.
I like the different footprints.
On the sot-23 could you put a fake component behind it as a backrest?

If you sell them sign me up for one.

btw I just checked your site:
"July 17,2013 - The SmallRoomLabs site has been hacked. Currently restoring from backup and patching holes. Please come back later."

Mick M
41
Bus Pirate Development / Re: Project: Bus pirate isolator/level converter version PA1
Hi Stefan;
  I did a search for"bi-directional fet voltage translator", and "i2c opto-isolator".
I got quite a few results.
The ISO1540 at Mouser is $4.95.

The buffer just drives the LED's - so not critical.

I am always nervous plugging my little BP into a new circuit.
So I am very interested in your progress on this.

This is just a hobby for me now, so I am not up on the the latest parts.

You can hand solder a 1mm part with 4 wires on a side ?.
I live on coffee, so no.

Post a picture.

Mick M
42
Bus Pirate Development / Re: Project: Bus pirate isolator/level converter version PA1
Hi Stefan;
  I see that this is your first post - welcome.

Google could not find "4929 buffer".
The NTUD3170NZ looks cool until you see the size SOT-963 1.0 x 1.0 mm - holy craps!!!

Could you not make this using  more standard and user friendly parts?
Maybe even PTH - so I could build one)

Why not use opto-isolators? - they make fast ones.
Also page 2 of the PDF is empty.

It looks very promising and useful - impossible to build though.

Mick M
44
Bus Pirate Support / Re: OVERVOLTAGE
Hi;
  The newer supplies have an "Output Enable" button.
This has saved me several times.

(after Dave Jones videos I bought the new improved  Korad KA3005P - love it)

Mick M

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