The 4R is a quad random voltage generator in just 2HP. The 4R generates two different random stepped voltages per input each time a rising edge is sensed at TRIG1 or TRIG2. The inputs are independent so they can work at different clock speeds. As TRIG2 is normalled to TRIG1 it is also possible to get 4 random values with just one trigger. The voltage range of each pair of outputs can be set as unipolar (0V to +5V) or bipolar (-5V to +5V).
Note: This build contains some SMD soldering – BUT all the smallest SMD parts are already pre-soldered – see the build doc for more info.