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Doepfer A-151 Quad Sequential Switch User Manual

System a - 100, A-151, Introduction

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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