I want to try to build a standalone Arduino on a breadboard. (ie, no external hardware needed to load code)
Is this guide still applicable? http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard
Based on it, i've assembled this parts list from Digikey. Let me know if there's any parts I can change to save some money/improve my end result.
1x 1050-1019-ND MCU 32K W/ARDUINO UNO BOOTLOADER
1x LM7805CT-ND IC REG 1A POS 5V TO-220
2x P828-ND CAP ALUM 10UF 50V 20% RADIAL
1x X433-ND CRYSTAL 16.000 MHZ SER 49US
2x BC1005CT-ND CAP CER 22PF 50V 5% RADIAL
1x 768-1028-ND CABLE USB EMBD UART 5V .1"HDR
1x SAM1031-50-ND CONN HEADER 50POS .100" SGL GOLD (I could get shorter headers, but this way i'll have extra)
1x 450-1645-ND SWITCH TACTILE SPST-NO 0.05A 12V
2x 67-2064-ND LED 5MM 2200MCD PURPLE WTR CLEAR (I want to get purple LEDs for fun, i've got regular colored ones already)
Here is a barebones one I made form that tutorial (was a while back)
I basically just took the the same thing from the breadboard.. (which I have made a couple laying around on the small breadboards from radioshack for quick dev).. and etched a home made/home brew PCB.. and used the same components.
(I then found a nice kit on line for $10.00..but doesnt have a vRegultor on it.. I put one on mine)
compared to the home brew on I made.. to the kit on-line:
I assumed that the capacitors in the corner of your board are the ~22pF ones for the crystal. The kit uses resonator which has internal capacitors (hence the need for a third terminal).
Putting the decoupling capacitors under the chip is not only a space saver but it is probably the best location possible since you want those devices as close to the component pins as possible.
That looks like a very nice kit and your homemade one isn't too shabby either. Did you include a ground pin between the crystal pins in case you want to substitute a resonator?
yeah I didnt post that one before... I can take a pic of it all put together.. with chip out too.
it 'is' a nice little kit IMHO.. (just needs a vRegulator of some kind)..
I attempted to add one to mine..works fine... I havent messed with it in a bit.. kinda made it for a buddy who needed to blink some leds but space was odd (a StarWars training remote prop/mod) shaped.
on my 'attempted' DIY Arduino clonne/pcb..(whatever).. I did 'not' include a ground pin for the option of crystal or resonator
I was looking at tuts on line and 'faking' my way through etching a board.. and designing a PCB..lol..