Ladik M-011 Modular Voltage-meter Module for Eurorack

Now that looks interesting;
If you (just like me) can't get enough of blinking lights in your modular, this might be something for you.

On eBay this Bipolar voltmeter module called Ladik M-011 popped up.
It's a very basic analog VU-meter for modular synthesizers with 3 switchable ranges (front panel switch): -2 to +2V, -4 to +4V, -8 to +8V, and a zero-point in the middle.

4 x Ladik M-011 Modular Voltage-meter

It has 4 LEDs/steps for positive and 4 LEDs/steps for negative voltage in the selected ranges and it seems very
handy for checking CV or audio output levels between modules.
There's also an LED for the centrepoint/zero input.

For example - slow LFO will light up alternating bar up and down (depends of waveshape),
symmetric VCO output will light symmetric bars (alternating so fast for eye) which appears like
continuous light in positive and negative range.
Not suitable for exact measuring of CV (tuning check or so). Step spacing is too big for this.
All three panel jacks are parallel (can be used as one to two multiple).
Quality England connectors (not cheapo China), durable engraved panel.

Video: Modular V-meter module ladik M-011 in Eurorack (Doepfer A100) format

" V-meter for Eurorack (Doepfer A100 system).
3 switchable ranges (front panel switch): -2 to +2V, -4 to +4V, -8 to +8V, zero in the middle. 4 steps for positive and 4 steps for negative voltage in selected range.
Very handy for checking CV or audio levels between modules.
For example - slow LFO will light up alternating bar up and down (depends of waveshape), symmetric VCO output will light symmetric bars (alternating so fast for eye) which appears like continuous light in positive and negative range.
Not suitable for exact measuring of CV (tuning check or so). Step spacing is too big for this.
Some flicker is caused by camera shutter, with high-frequency input signals bars "steady lights" (too fast switching for eye)."

Uploaded by RuprechtM

Built by the seller.
The PCB on rear side is silver coated.
The module has a max. depth of 60 mm and costs $65
Power ribbon cable included (handy 20cm, 16/10pin). 6 mA +12V / 6 mA -12V

Via MATRIXSYNTH / eBay

A-197 Analog Meter

Another A-100 module that was discontinued a few years ago is the  A-197 Analog Meter.

This simple module could be used to display DC or AC voltages by means of an illuminated moving coil meter with mirror scale.
The display range is 0...+10V (resp. -5V...+5V in the offset mode) and the module features 3 different measuring methods that can be selected with a toggle switch:

Picture via Matrixsynth

Full Wave Rectifier: This mode is normally used to display audio signals resp. AC voltages. The incoming signal is rectified and smoothed with a low pass filter.

Direct Mode: In this mode the incoming voltage is lead to the meter without additional electronic modification.
This mode is used to display positive DC voltages, e.g. ADSR (A-140/141/A142), MIDI-to-CV (A-190/191), positive random voltages (A-149-1), foot controller (A-177), Gate/Clock signals.

Offset Mode: In this mode +5V are added to incoming voltage before it reaches the meter.
Zero volt input correspond to the middle position of the display needle (i.e. +5V read out).
This mode can be used to display positive and negative voltages, like for example a slowly swinging LFO (A-145/146/147), A-148 Sample&Hold, bipolar Random Voltages (A-118), A-174 Joystick, A-178 Theremin, A-179 Light Controlled CV source.

The measuring input is available as a triple multiple so that the signal can be used in the system simultaneously.
An LED lights up if a negative voltage appears at the measurement input.

I don't own an A-197... The module seemed useless to me at first because of the lack of possibilities, and i was (and still am) thinking about buying an oscilloscope at some point.
Since this module is no longer available it will be hard to find one nowadays.