using the TIL311A for design verification and as a programming tool. http://www.hkm97.com/display/index.html
Yes, this is another 'Modular' type of plug-in for the breadboard to be used as a "firmware programming tool", that developers can use to develope their code and designs with when they do not have a lot of I/O to work with from their microcontrollers. I also have a switch input module based on the 74LS165 for serial input using the same principle. These two concepts of input / output for the beginning firmware developer can be demonstated without a lot of wiring on the breadboard, and for the advanced firmware programmer, they would now have a quick way of verifing their designs and see their data in real time. And both would then have more room on their breadboard to build more circuitry and accomplish more. A lot of companies have their specialized 'Modular' plug-ins for the breadboard that are specific to their type of development system they are selling. My line of tools are general purpose and universal.