Standalone Arduino with USB

Projects General Guidance
1

I have previously built a standalone Arduino with an ATtiny85 and it works just fine.

Now I would like to build another and add a USB socket for programming and serial monitoring.

I reviewed the Nano schematic, but then I also found attached drawing.

The only part I am interested in on the drawing is the USB.

Could someone knowledgeable please confirm that the USB as shown will allow me to program and use the serial monitor.

I don't have all the parts, so can't breadboard it at the moment.

SCH_IM130615003_Iteaduino_Tiny.pdf (18.1 KB)

2

Broken link.

You don't need to add an FTDI chip on the board. You can program (and use the serial monitor) your Arduino through an FTDI breakout, which you can use for any other Arduinos you are going to build. You save some bucks there.

3

Link is good, web site is down.
I attached drawing to first post.
I am looking for an answer to my specific question - not alternatives.

4

Could someone knowledgeable please confirm that the USB as shown will allow me to program and use the serial monitor.

I'm not someone knowledgeable, but it looks to me (from the schematic) that you will need to program that ATtiny85 to be able to communicate over the USB.

5

Hi,
Can you tell us where you got that circuit diagram, and then we can possibly advise you.
florinc has a valid point, it looks like the atiny will need specific programming to use that circuit.

What is wrong with fitting ISCP headers and using FTDI breakout or ICSP programmer that you can get in ebay much cheaper than you could build one.

If it needs to be permanent then mount the two PCBs together.

Tom.... :slight_smile:

6

TomGeorge:
What is wrong with fitting ISCP headers and using FTDI breakout....

How would you connect the FTDI breakout to the ISCP header - i.e. which pins would you connect to each other?

7

This uses the FTDI to bootload the uC.

8

CrossRoads:
This uses the FTDI to bootload the uC.
Programming the Arduino Bootloader | FTDI Friend | Adafruit Learning System

The comment by TomGeorge made programming an ATtiny85 with FTDI break-out sound trivial.
So I am interested to know what his comment is based on.

Hence, my question specifically relates to programming an ATtiny85 with an FTDI breakout.