Re: [beagleboard] Two BBBs have broken down, is there any mistake in my circuit board?

2014-05-06 Thread uguryil44
I solved the problem (3.3 volt and some voltage values are coming to beagle pins before the processor comes up) with a load switch. Its enable voltage comes from the SYS_RESETn. https://www.dropbox.com/s/7hocodvoeib2q76/valve_drive.pdf After install the *switch load *on my board, the 3.3 volt i

Re: [beagleboard] Two BBBs have broken down, is there any mistake in my circuit board?

2014-05-02 Thread uguryil44
Hi, OK i solved the 3.3V problem with a load switch, thanks again. One more thing, i put the BBB inside a box and need to check the power led without open the box. So i'm trying to move the BBB's power led outside of the box. I find the pins of user leds in the BBB_SRM; USR0 --> GPIO1_21 US

Re: [beagleboard] Two BBBs have broken down, is there any mistake in my circuit board?

2014-05-01 Thread uguryil44
Hi, Thank you for your reply. Headers; J1-J2-J3-J4-J5-J6-J7-J8-J18-J19-J20 / headers of valves, J17 / header of pump, J12-J13 / headers of digital input, J9-J10 / headers of 12 volt and ground, J14 / header of analog input. Grounds are not tied together because high current switch is occur in o

[beagleboard] Two BBBs have broken down, is there any mistake in my circuit board?

2014-04-29 Thread uguryil44
Hi guys, I run 12V valves(insulated channels) and read pressure values by I2C with my BBB board. I don't understand what has happened but two BBB were broke down with this board. When i am plugging in my power supply; one of the broken BBB's LED is not work, the other one's LED is on but does