This fantastic flexible 3 digit counter module is just the shot for adding a digital readout to your projects! It can be expanded up to a huge 30 digits simply by adding more 3 digit modules, thanks to a great new modular design. It features blanking inputs, latching input (display freeze), and up/down count select.
The counter display increments every time it receives a rising edge pulse from an input source eg PIR, pressure mat, light beam relay etc.. Applications include people counters, car counters, sheep/cattle counters, event logging etc. Dimensions: 46 x 71 x 33 mm
John has built and reviewed the kit over at his personal website (which if he is reading this, should be updated more often!)
Download instructions (.pdf).