Inverted Binary Divider / Counter (wide)
3×5×2 (30 block volume)
flat, silent, 3-wide stackable (alternating)
output pulse: 2 off-ticks
This circuit triggers on a 2-tick off-pulse input, and outputs a pulse for every two input pulses. It can be stacked to obtain a divider for any power of 2 (2, 4, 8, 16, etc).