We are looking for a supplier that can produce a data aquisition board that have anolog/digital input and digital output. We have all the draws of the boards and all the technical specifications to built it. We already produce it, but we would like to have a better supplier. contact us and we weill send you all the tecnical specifications and the draws, we are a trading company based in beijing. the general description first version: USB 1.1 and USB 2.0 Asynchronous sampling. This means that sampling can be performed inthe background while the main application is doing something else (seecomedi's "cmd"). Power supply via the USB, no external supply Electrically isolated analogue input and output stage (1000V) Asynchronous acquisition holds for up to 16 USB devices (subject to resources/processor speed).A/D converter 8 channels 12 bit resolution Single ended Input range (can be set by software): Unipolar: 0. . . 4.096V, 0. . . 2.048V Bipolar: -4.096V. . . 4.096V, -2.048V . . . 2.048V Input resistance: 10M Sampling rate (asynchronously in the background): USB 1.0: All channels simultaneously at a rate of 1kHz (e.g. every USB frame) USB 2.0: 8kHz/channel (e.g. one channel every 125us)D/A converter 4 channels 12 bit resolution Output range: Unipolar: 0. . . 4.096V Bipolar: -4.096V. . . 4.096VThe different output ranges appear at different pins of the connectors. Max output current: 20mA Sampling rate (asynchronously): All channels simultaneously at a rate of 1kHz (e.g. every USB frame)8 bit digital I/O Direction is programmable via comedi. 2 up/down/reset counters (500Hz sampling rate)Connectivity D connectors only Female 25 pin D connector electrically isolated for analogue I/O with +/-5Vsupply and Vref. Female 15 pin D connector for the digital I/O.Physical Dimensions Enclosure: 144x90x30mm Board: 136x80x15mm the general description second version: General USB 2.0, only Asynchronous sampling. This means that sampling can be performedin the background while the main application is doing something else(see comedi's "cmd"). Power supply via the USB, no external supply Asynchronous acquisition holds for up to 16 USB devices (subject to resources/processor speed).A/D converter 16 channels 12 bit resolution Single ended Input range (can be set by software): -0.5V . . . +0.5V -0.75 . . . +0.75V Input resistance: 185k Recommended source resistance: less than 50R Sampling rate (asynchronously in the background): Continuous: max 3MHz Burst: max 30MHz (256 samples)Digital I/O  Connectivity Female 44 pin HD connectorPhysical Dimensions Enclosure: 144x90x30mm Board: 136x80x15mm contact: Massimo tarantelli Ocean 51 Co. Ltd.