Methods and systems for communicating information through a USB device with A/D converters are presented. Active components which provide analog signals to the A/D converters are switched off to cause spikes in the analog signals/channels. The spikes are digitized by the A/D converters and sent to the host through a USB interface. The active components are switched on and off in a pattern corresponding to a message, such that the host can determine the message from the resulting spikes. If multiple active components and A/D converters are used, then multiple ‘bits’ can be transmitted simultaneously using the different channels.