Ever wonder how many primers you've used or have left on your progressive press?  It's often difficult to know when you can't see inside the primer tube.

The stand uses a LM393 sensor and a counter (I used an Arduino with a LCD display) to count the total number of primers you have left (or used) in a particular session.

Included in this release is the stand and several flags with 1mm and 2mm spacers for adjustment.  Also included is the Fusion 360 file for the #3 flag.  The numbers correspond to the Dillon pin numbering system. 

This was created for a Dillon A450 Progressive Press, but could be adapted for other equipment such as the Dillon RL550B or C.  

Created with Fusion A360 as part of a larger project.  Printed in PLA at 0.2 layer height with 0.4 nozzle.  Flags have been painted flat black to reduce the number errors (miscounts) due to the LM393 not being a polarized sensor.

NOTE:  The Stand is common with the Round Counter (found here: https://www.printables.com/model/346783-round-counter)