TQFP SMD adapter / converter pcb

SMD to DIP.

This is nice if you want to use it with breadboards.

ATMEGA128_PCB
tqfpsmd111
tqfpsmd11

These are smd converter. not possible on breadboard. unless you are willing to use jumpers.

tqfpsmd

above has 2 sides.

top side is 32..64  0.8mm smd. but the pin numbers are correct for 64 pins.

bottom side is 32-100 0.5mm. pin numbers are correct for 100pins.
tqfpsmd1

 

bought these two;

a2 a1

 

it finally arrived.

P1100688e

then i soldered 24c04 and 24c256 for testing.

P1100690e

 

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arduino eeprom.h vs wire.h

how to use eeprom.h

http://arduino.cc/en/Reference/EEPROM

used to read and write the internal eeprom of atmega mcu.

how to use Wire.h

http://arduino.cc/en/reference/wire

http://playground.arduino.cc//Code/I2CEEPROM

used to read and write external i2c serial eeprom like 24C32, 24C128.

more info about external eeprom

http://www.lvr.com/files/seeprom.pdf

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Dangerous 5V AcDc plugs!

CE, Communitee European, China Export, Cheap Edition or Closeby Explosion?

Here these things are sold by thousands as phone/ tablet gadgets along with the corresponding cable sets on market places…

I was lucky I could smell something, it could have went worse.

The 2 to 5 euro cost might sound very interresting to many, but it just ain’t worth to risk!!!

Plug1

Plug2

Plug3

Plug4

Plug5

Plug6

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Reversing R/C Hummer Control, the Hummer story…

SCR_Scheme

SCR_Elements

SCR_Top

SCR_Btm

SDT_Scheme

SDT_Elements

SDT_Top

SDT_Btm

SDT_Stack1

SDT_Stack2

Drawing the raw circuit (left), optimising the circuit for own purposes (right), analysing the ingredients and soldering the 1st prototypes…
The pcb’s were just soldered and therefore not tested nor verified yet!

The SDT-Pcb could be connnected directly to the Arduino though due to the limited amount of available free pins with my TFT-Touch screen I decided to add it to my MCP23016 Pin expander chip/ shield to operate it on the available a4/a5 i2c pins later.

Now it’s time for checking & testing the pcb’s and create some arduino code so that we could do our first real tests…

Will be continued…

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Reversing R/C Hummer Control

the hummer story…

hummer

Donor

Sdt_Through

Scr_Back

Scr_Front

Scr_Through

Sdt_Back

Sdt_Front

I once bought such Remote Controlled Hummer Car but it couldn’t satisfy me just driving it.

So I pulled out the RX and TX boards and now will try use these 27MHz communication lines for/ on arduino purposes.

I couldn’t find any info on internet about the SCR2000 UC2E0K and SDT2000A UC2F1F0 chips but it won’t be too hard to redo a circuit as seen on the pictures.

Will be continued next time…Bye Mum

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nokia bt module

DSC_6082ere a nokia bt module i salvage.

DSC_6084e

btschemahe

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AT91SAM7X256

got this old gsm dongle that has AT91SAM7X mcu. 11bbps_resize it is/was made by b-phreaks.co.uk or http://www.genieprojects.co.uk/ To be able to use it as a AT91sam7x dev board. 1st to erase the mcu flash just short the erase pin with 3.3v. now sam-ba can upload bin files.

for TXD/RXD with irda.

The USART0 peripheral has five possible external pins (RXD0, TXD0, SCK0, RTS0, CTS0). On the edge of
the chip package, these pins are labeled PA0, PA1, PA2, PA3, and PA4.
B

 

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