Deopfer A-151V Quad Sequential Switch is a logic module for modular synthesizers in Eurorack format. The vintage version of the module has a trigger input, a reset input, four inputs/outputs and a common output/input. Voltages in the range of -8V to +8V can be processed on the I/O or O/I connections. The module works bi-directionally, meaning inputs and outputs are interchangeable. With each pulse at the trigger input, the common output/input is switched to the next input/output. A positive pulse at the reset input switches the common on/off input to the first input/output. Four LEDs indicate the active input/output (i.e. the one switched through to the common off/input). Deopfer A-151 quad sequential switch at a glance: logic module, trigger input, one reset input, four inputs/outputs and a common output/input, processes voltages in the range of -8V to +8V, vintage version of the module, MS ID: SYN0006470-000, manufacturer: Doepfer, TE / HP: 4, depth (mm): 3. 5, + 12. V (mA): 20, - 12 V (mA): 10 keyboard instruments, modular synthesizer, various modules