Go Down

Topic: Questions about Arduino (Read 1 time) previous topic - next topic

eng_osama


The chip in my home brew is mounted on stripboard, the chip is the same one used in most Deumilanove/Uno/numerous clones. The Leonardoi is surface mount and wouldn't fit, Surface mount is tricky on a small scale hobbyist level. At a push you can program the chip on a Uno, lever it out of the socket and stick in it your own board.  Its just about practicalities.....

The other picture shows it mounted on what I designed it for : mounting on a Raspberry Pi. http://www.raspberrypi.org/faqs


So .. simply you say that Leonardo chip cannot be extracted out of the board and be stuck in and programmed to my board  for a beginner like me. And UNO is easier in that part because I can push it out of the Arduino board socket and then put it into where board I like .. isn't it ? .. ok that's comforting because I've already ordered a leonardo !! .. but by then, how can I know the right pins of the chip and connect them to the right elements in my circuit ?

Rasberry .. I see now .. so do you recommend me to change my order and buy an UNO ?

pluggy

#6
Oct 28, 2012, 05:33 pm Last Edit: Oct 28, 2012, 05:35 pm by pluggy Reason: 1
Depends on whether you want to pull the chip out of it or not......

I don't own a Leonardo, but I know they don't do an old school 28 pin chip in an old school 28 pin socket version.  They used to do a SMD (surface mount) version of the arduino Uno, I don't know if its still available.  

If you wanted to take a surface mount chip off a bourd it involves special kit and melting solder.......

pluggy

I have around a dozen Arduinos including thiose I made myself, owning more than one is very useful, especially when it comes to burning bootloaders (google it) and trouble shooting.  One of my dozen is an SMD clone, it has its uses but I can't take the chip off it......

eng_osama

pluggy .. Thanx a lot. But you talk professionally and I don't know anything yet about SMD clones or microcontrollers as I said before.

Arrch .. Thanx a lot .. this is a good answer I was waiting for.

pluggy



Lesson one : The chip circled in Red on the Pi is surface mount (a SMD - Surface Mount Device). The chip circled in blue is what used to be standard many years ago - a through hole chip mounted in a socket which is soldered on the reverse side with the legs of the socket going through holes.  They are relatively easy to mess around with a soldering iron and cheaply available stripboard or home made circuit boards. SMD needs specialist gear that a hobbyist isn't likely to have (or even afford).  In a mass production environment, the SMD lends itself to automation and hence cheap to produce in quantity.  

Go Up