• Found Minor HW bug

    Shane12/03/2018 at 03:34 0 comments

    I built 5 of these PCBs, using a 100uH inductor.  3/5 PCBs flickered.  I found that the uProcessor was being reset intermittently due to the fast transients in the boost converter.  The cross talk made it to the uProc's power supply line and caused it to reset.  I fixed it by adding a bypass capacitor on the backside of the programmer pin head array.  I also turned down the H-Bridge frequency to reduce the power loss.  It now works with no flickering and no hot devices.  I have had on a moon in my sons room for a month now with no issues.

  • Updated PCB Progress.

    Shane10/13/2018 at 02:44 0 comments

    I have received a revision to the latest design, the FET was getting a bit hot when trying to drive a meter of EL wire.  So I added some metal to the layout to try to reduce the temp on it.  The temperature of the FET was too hot to keep my finger on it for more than 30 seconds.  I have built one it does work, and I am trying to optimize the Boost converter signal period on duty cycle to get the most power output while keeping the FETs temperature under control.