Doepfer A-151 Quad Sequential Switch - Manual

doepfer System A - 100 Quad Sequential Switch A-151
1
1. Introduction
Module A-151 (Quad Sequential Switch) is like an
electronic four-position rotary switch.
It includes trigger and reset inputs, four in / out-
puts, and a common out / input.
Each time a pulse is received at the trigger input
socket, the common out / input is connected to the
next in / output. After the fourth in / output, the next
trigger makes it step back to the first again, and so on
(see Fig. 1).
Voltages in the range -8V...+8V at the O/I resp. I/O
sockets can be processed by the module.
Four LEDs indicate the active in / output (ie. the one
that is connected to the out / input at any particular
time).
A positive pulse at the reset input switches the out /
input immediately back to the first in / output (see Fig.
1).
Version 2 of the module (from about 2005) is equip-
ped with an additional switch that is used to set the
number of steps to 2, 3 or 4. On top of that the new
versions allows to switch audio or control signals
within the full A-100 voltage range (i.e. -12V...+12V).
Trig. In
A-151
SEQ. SWITCH
Res. In
O/I
I/O 1
I/O 2
I/O 3
I/O 4