Firsts

I've started to get back into my highly technical side of life again. The first step is to learn more about AVR's Sure that arduino sitting on you desk is cool and all and those wires in that breadboard impress people. But when you start making real projects that you want to keep you need to do something more than put that breadboard in a box.

This is a board based on a ATTINY 2313/4313. It's very SMD, but designed for hand soldering. It's 7 breadboard rows wide(0.7 inches between the 10 pin headers) so it'll fit well. and you can solder wires when you need to make a real project, way more street cred hand soldering 0805's then 1/4 watt TH resistors.

Why a tiny 4313 when 2313's are so popular? Double the memory and they are still under 2 bucks each. I also want to play with VUSB it takes up most of the 2313's flash space. USB circuits are integrated, and not broken out to the bread board. Usb provides easy power and some real functionality. To round it off, I'll add a spot for a crystal. These have been sent to OSH Park for building. Set me back $15 for 6. I've started using DIP Trace for PCB stuff. It's faster than eagle, and parts building is less complicated. I've included gerber and dip trace files. The drawing is unfinished. I like to connect headers on the PCB vs line drawings. this makes sure i get the right pins. Unfortunately I haven't figured out how to get the PCB view back in to the drawings. but the PCB file is correct, and you can work it from there.

The row of discrete components are top to bottom: 100k ohm, 68 ohm, diode, diode, 68 ohm, 1.5K ohm

A31727CT-ND	CONN MINI USB RCPT RA TYPE B SMD	1
ATTINY4313-SU-ND	IC MCU 8BIT 4KB FLASH 20SOIC	1
CTX904-ND	CRYSTAL 12.0000MHZ 18PF T/H	1
MMSZ4685-TPMSCT-ND	DIODE ZENER 3.6V 500MW SOD123	2
311-68ARCT-ND	RES SMD 68 OHM 5% 1/8W 0805	2
311-1.5KARCT-ND	RES SMD 1.5K OHM 5% 1/8W 0805	1
311-100KCRCT-ND	RES SMD 100K OHM 1% 1/8W 0805	1
445-1273-1-ND	CAP CER 22PF 50V 5% C0G 0603	2

Gerber files and Dip trace files can be found here.

Everything was ordered today so check back in a couple of weeks when OSH Park cranks them out.