Test 3

A voltage and current meter for the Eurorack power rails, in 8 HP. A four-digit LED display shows the voltage, the real-time current or the stored peak current of the +5 V, +12 V or −12 V rail: the RAIL button steps through the rails and the MODE button through the measurements, each shown by its LED, and holding MODE down resets the stored peaks. The peaks keep updating on all three rails in the background, and the display blinks when a reading goes over its limit. A module powered from the METER OUTPUT header, or several on a flying busboard cable, has its current draw measured up to 1 A per rail: a tool for finding a module's maximum draw, checking a power supply, troubleshooting a DIY build or powering a breadboard. Sold as a very easy do-it-yourself kit, with an optional front panel.