This board provides a convenient mounting for several types of PowerDsine ™ and Black Magic ™ modules which produce 20Hz ringing signals from 5- or 12-volt DC inputs. As far as I can tell, these modules are all out of production, but they appear for sale on eBay and Telephone Collectors’ lists from time to time. These are handy for demonstrations, model railroad dispatching systems and community theater applications.

We offer these as bare boards only as we have no reliable supply of these modules (contact us if you've got some you'd like to sell!)

• Small Footprint 2 x 2.75” (5x7 CM) by ~ .5” high depending on module used.
• Fits in MRCS' standard 7CM “Snap Track”
• Power connections on 2.54 mm screw terminals or 2.1mm Barrel Jack. One 12V "Wall Wart" can be daisy chained to power several adapters using the 12V screw terminal connections.
• Supports the Inhibit (INH) function on PowerDsine modules and a voltage divider provides a convenient 5V reference voltage so that an external contact (NC to inhibit) can gate ringing.

Available as a panel of two bare boards, you supply the module. If you have modules but want us to assemble the boards, please contact us.

EAGLE CAD Files

Gerber Files (to submit to PCB fabricator)

Schematic

Assembly and Installation Instructions