Specs

Size: Board is 130mm x 54mm, assembled stands 40mm tall.

Powered by 12V, center positive, 5.5/2.1mm barrel jack. This is the same as the Pulsar-12 supply, and you can power the buddy with a Y power cable (supplied) tapped off the Pulsar-23. It uses only 50mA (still need to verify this).

Connections are both pins for alligator jacks (Pulsar-23 style), and banana jacks. Eurorack connections can be had through teh Pulsar-23 (if you're using one), or via standard converter boxes.

Ground connection to Pulsar-23 is through the Y power connector. Ground connection to other synths supplied via a ground banana jack. Don't forget to ground!

Output triggers are 0 to 10V, assuming into 100kΩ inputs. If you mult them to multiple inputs, expect some droop, but it should still be enough to trigger most units.

All connections are protected against reasonable abuse: You won't harm the buddy if you accidentally connect a trigger output to some output on your modular. It's been tested with voltages in the range +12V to -12V. Outside of that you might cause damage, but neither the Pulsar-23 nor standard modulars have voltages outside that range.