Perhaps the simplest solution to the stated requirement is the FTDI FT245R IC.

The key points of note in the context of the question are:

• Royalty-free USB drivers from FTDI for Windows, MacOS and Linux (MacOS support only for USB VCP mode)
• Complete USB device mode protocol handled on-chip without custom programming
• Complete USB hardware on-chip, including USB resistors
• 8 GPIOs available - will allow future expansion for inputs from the microcontroller too
• USB suspend / resume support, to switch device to low-power mode when not in use
• Integrated level converter and 5 V, 3.3 V, 2.8 V and 1.8 V totem-pole output, so it can talk to most standard microcontrollers
• No additional crystal or oscillator required, it's all integrated.
• Free sample implementation code for both computer and FT245R ends

In terms of time saved in implementation, and future requirement bloat, this is perhaps the fastest, simplest and cheapest 1-chip answer to the requirement. Price for individual units is around $4-5, and in the $2 range in volumes.

Tämä adafruit-mikro-usb GPIO: lle näyttää hyvältä, mutta Numato, josta puhuit, on hieman suurempi hieman enemmän. Jos etsit todella jotain suurta ja olet valmis maksamaan lisää rahaa, suurin Numato-muunnelma on sinulle.

Joka tapauksessa saan adafruit-lähinnä siksi, että se on hyvin pieni, mitä tarvitsen projektissani.

(Suurin numato-versio on täällä: http://numato.com/32-channel-usb-gpio-module-with-analog-inputs /)