FSS builds modular synthesizer components and accessories, predominantly for Eurorack format.
I blogged about their APOW +5Volts module a week ago, you can find it HERE.
|Future Sound Systems AJAK2 Voltage Indicator|
Basically it is a 3.5mm jack plug connected to bipolar LED, where the Blue LED indicates positive voltage, and the Red LED indicates negative voltage.
It is also available in a Red/Yellow version as AJAK1
It's a fun little thing, especially if you like blinking lights on your Eurorack... like i do :-)
The indicator is (almost?) identical to the LADIK Modular Checker that i blogged about earlier this year, I assume that this one also starts glowing if it registers a signal of approx 2 Volts, but i have no equipment to check this...
Available via www.futuresoundsystems.co.uk