Bob Kieffer asked me to help him with a project a month or so ago. He had a small call that he wanted me to design a board to run. Some of his requirements were it had to have a CDS sensor to monitor day and night. It had to be controlled by a picaxe chip which would enable him or anyone the ability to "tweak" the program. It needed several Dip Switches so the programming can be adjusted in the field. Actually all the requirements were easily met. So I designed the board, got a few prototype boards made and the testing began. I ordered a call from Ebay. Did the very simple hack. Downloaded the program and began testing. It works flawlessly. The more I thought about it I realized that this board could also have another purpose for us "Homebrewers"....For a couple years now we have been using a day/night circuit board that I had made up using a circuit that DKirk designed. It would turn On a remote slave flash at night and turn it Off in the daytime. The problem with it was the slave flash was "Always ON" which killed the battery life substantially. We needed a board that would just turn on the slave for a few seconds every 10 minutes or so to refresh the capacitor but we needed the ability to "sense" when the slave fires so it can turn on the power to the slave immeadiately so it could refresh everything and be able to fire the second shop. So by simply adding a PT sensor to the circuit I was able to do just that. The PT sensor tells the chip if the slave fires between the 10 minute cycle so it can instantly recharge just like the SlavePRO1 and the other slave control boards do. This will greatly save battery life in the remote wireless slave builds all the DSLR folks are using. These boards will be available in about 2 weeks or so...I hope they help the Homebrew community.