Hey y’all, I’ve got some updates on the development progress. The redesigned 8 channel board has been ordered and should arrive late this week I believe. Assuming it works, I will write up the firmware to do circuit breaking and constant current as well as voltage measurement as all that. The next step is creating a iPhone app that covers the basic functions and allows for programming the unit. Then, more bench testing followed by on road testing.
The ETA for the 8 channel bluetooth PDUs is still up in the air. If the hardware I receive on Friday is good, April is possible but seems unlikely to me. Too many questions still unanswered, not the least of which is how do I fund the building of the first round of devices? Stay tuned…
I’ve been busy all weekend working on an updated version of the 8 channel Bluetooth PDU. After testing the current version you’ve seen in the videos, I’ve made some performance updates. I’ve also added 2 channels of true hardware constant current. Those two channels will be selectable as a constant current source or traditional fused circuit. If you short circuit a constant current source it will just source however many amps you tell it to. This may be a fire hazard but it does have utility. I would not use constant current without specific need, but when you need it, you really need it.
I have more testing to do with with a version of the hardware I just received in the mail on Thursday. When that testing is complete, I’ll be making any changes necessary to this version and I think we will be very close to a final prototype. This version is a little bit bigger. It is 3″ wide instead of 2.93″ wide. The performance improvements were worth the modest size increase. I did have to make the board 4 layers which is more expensive but the board is WAY to crowded to be 2 layer any longer.
I’ve built up the board and have begun testing the electronics. I am using a generic bluetooth program to talk to my device and going through some of the basic functions the device will be required to perform in order to work.
So far so good. Communication with iOS devices works well. Over current protection functions as expected.