USB Swipe card reader interfacing

So I want to do something with a card reader but the overwhelming majority of readers seem to be USB, I could find like 2 RS232 ones on eBay for more than I wanted to pay. Most of the USB ones say they can do keyboard emulation, does that mean I can slap on one of those usb to ps/2 adapters and just follow this? http://playground.arduino.cc/Main/PS2Keyboard

If not, any suggestions on using a USB reader with Arduino (on the cheap goes without saying)?

I would interpret that as meaning they "pretend" to be a keyboard (via USB) so you open a word processor, put the cursor where you want it, and then scan in a bar code (or swipe card or whatever) and it "types" it into your document.

does that mean I can slap on one of those usb to ps/2 adapters

You could try. It might work.

Nonyaz: Most of the USB ones say they can do keyboard emulation, does that mean I can slap on one of those usb to ps/2 adapters and just follow this? http://playground.arduino.cc/Main/PS2Keyboard

Sorry, wrong way round! USB to PS/2 adapters make a PS/2 device into a USB device. The project you cite allows an Arduino to read a PS/2 device, in which case you can make an HID interface (as with a Leonardo) to a USB host - just like the aforementioned USB to PS/2 adapters for ten times the cost.

What you want is a "USB host shield" - and of course, the libraries to go with it. Look that up.

Paul__B: Sorry, wrong way round! USB to PS/2 adapters make a PS/2 device into a USB device. The project you cite allows an Arduino to read a PS/2 device, in which case you can make an HID interface (as with a Leonardo) to a USB host - just like the aforementioned USB to PS/2 adapters for ten times the cost.

What you want is a "USB host shield" - and of course, the libraries to go with it. Look that up.

No no, I worked at a computer repair place at around the time of the switch over, I'm very familiar with these adapters: http://www.newegg.com/Product/Product.aspx?Item=N82E16812196223

I am very suspicious about that device. I have a number of adapters which look like it, but all are "passive". I note one reviewer claims that the one cited is an "active" adapter but it is extremely dubious.

At "the time of the switch over", most if not all USB HID devices were manufactured to function as either PS/2 or USB, the device itself implementing the functionality and the adapter merely connecting appropriate pins but I (seriously) doubt more recent devices would do this.

I shall be very interested to see how you go purchasing this particular adapter and testing it with your card reader in a PS/2 port. It could of course be that the card reader itself happens to implement PS/2 as an option, even if not documented.

Nonyaz: So I want to do something with a card reader but the overwhelming majority of readers seem to be USB, I could find like 2 RS232 ones on eBay for more than I wanted to pay. Most of the USB ones say they can do keyboard emulation, does that mean I can slap on one of those usb to ps/2 adapters and just follow this? http://playground.arduino.cc/Main/PS2Keyboard

If not, any suggestions on using a USB reader with Arduino (on the cheap goes without saying)?

Hi, you can take a look at Syncotek swipe card reader, most of them have USB interface, and you can also select RS232 interface item from there. You can directly insert the USB swipe card reader device to your computer or other machine. Hope this helps!

The post above is the last one he ever made on an Arduino forum.

Do you think he is still monitoring it 34 months later?