This is the Whadda WSI8055N USB Experiment Interface Card, a DIY mini kit packed with functionality. It offers 5 digital input channels and 8 digital output channels. In addition, you get two analog inputs and two analog outputs with 8-bit resolution. You can expand the number of inputs/outputs by connecting up to 4 cards to your PC's USB connectors. All communication routines are housed in a Dynamic Link Library (DLL) K8055D.DLL, making it possible to write custom Windows (XP, Vista, Windows 7) applications in Delphi, Visual Basic, C++ Builder or any other 32-bit Windows development tool that can call a DLL.The diagnostic software includes individual output/input tests and 'clear all / set all' functionality. It also has a counter function on inputs 1 and 2 with adjustable debouncing (max 20KHz depending on total input/output load), and analogue input with bar graph display. Compatible with our previous version and uses Microsoft® human interface device (HID) driver, no extra driver needed.Features * DIAGNOSTIC / TEST SOFTWARE: * separate output / input test * clear all / set all function * counter function on inputs 1 and 2 with adjustable debounce (max 20kHz depends on total I/O load) * analogue output set sliders * analogue input bar-graph indication * minimum system requirements: * 1 GHz or faster 32-bit (x86) or 64-bit (x64) processor * USB 1.1 or higher connection * Windows XP or later Specifications * 5 digital inputs (0= ground, 1= open) (on board test buttons provided) * 2 analogue inputs with attenuation and amplification option (internal test +5V provided) * 8 digital open collector output switches (max. 50V/100mA) (on board LED indication) * 2 analogue outputs: * 0 to 5V, output resistance 1K5 * PWM 0 to 100% open collector outputs max 100mA / 40V (on board LED indication) * up to 4 cards can be connected to PC * general conversion time: 2ms per command * uses Microsoft® human interface device (HID) driver, no external driver required. * diagnostic software, examples and DLL are downloadable via our website * power supply through USB: approx. 70mA * dimensions: 145 x 89 x 20mm / 5.7 x 3.5 x 0.8″ https://elecena.pl/product/27743877/whadda-usb-experiment-interface-board-diy-mini-kit 2025-01-23 https://elecena.pl/product/27743877/whadda-usb-experiment-interface-board-diy-mini-kit 2025-03-22 https://elecena.pl/product/27743877/whadda-usb-experiment-interface-board-diy-mini-kit 2026-01-25 https://elecena.pl/product/27743877/whadda-usb-experiment-interface-board-diy-mini-kit 2026-01-30