I tried with a relay board now but 3,3V GPIO from BBB to the optocoupler was too weak to provide stable switching. Also I think a 5V relay drawing ~60mA is a bit overkill for just shorting the IP_S-pin. It has to be a better solution?
Thanks, that sounds like a good solution!
I will look up some components and maybe use the prototyping area on Hermes to make the circuit.
I will look up some components and maybe use the prototyping area on Hermes to make the circuit.
Thanks miero! Just to confirm, the best way of powering the Cronus + Hermes combo would be hooking the Cronus up to the +3.3V and ground external I/O pins on the BIIISE?
Dear Russ,
No matter what I do, I can't get the Hermes LEDs to lit, nor getting the reclocked BBB to work...
I tried several ways of powering the system, non worked.
When I feed the BBB with the Hermes' 5V terminal, it doesn't boot at all.
Any idea ?
No matter what I do, I can't get the Hermes LEDs to lit, nor getting the reclocked BBB to work...
I tried several ways of powering the system, non worked.
When I feed the BBB with the Hermes' 5V terminal, it doesn't boot at all.
Any idea ?
No - it needs ~5V not 3.3V. 🙂
I think Miero was meaning the VD supply - on the B3 that supply is brought out to a pin on the digital input header.
Yep, it boots flawlessly from its USB.
I don't have a 5V wall wart to try, but feeding 5V from the Hermes side isn't working.
I don't suspect I have fried something, I have worked some times on the BBB with Hermes and Cronus attached, but not powered.
I don't have a 5V wall wart to try, but feeding 5V from the Hermes side isn't working.
I don't suspect I have fried something, I have worked some times on the BBB with Hermes and Cronus attached, but not powered.
I thought that seemed like it might be a miss-match. 🙂
Thanks Russ. So do you think I should run two sets of wires from the Reflektor (one to BIIISE, one to Hermes), daisy chain from BIIISE to Hermes (or vise-versa), or just use two separate Reflektor supplies?
Since I'm planning on running the Buffalo in synchronous mode I wasn't sure if one way of supplying power would be superior to another, or if synchronous is even a factor in the power equation other than needing one less Trident.
Brian, Russ,
Is it possible to send me some nylon washers?
I do experience a boot failure without proper insulation near the sd card reader.
Currently a piece of paper does the trick but that isn't sustainable ;-)
Thx
Is it possible to send me some nylon washers?
I do experience a boot failure without proper insulation near the sd card reader.
Currently a piece of paper does the trick but that isn't sustainable ;-)
Thx
I wanted to ask a question concerning the battery again:
On the first page you say:
The 062535 I can only find somewhere in Asia.
So I looked further in the thread and there I found, that I can use any battery (3,7V, LiPo) that has a over- and undercurrent and charging protection. Is this correct?
I wanted to be sure because any battery with protection is easy to find anywhere on the planet, but I don't want my expensive DAC to be fried when the LiPo catches fire. From this point of view another battery time would be preferred, but as I understand is this a design choise of the BBB team.
What is the maximum charging current? I ask this to chose a battery so that the charging current is max 1C for the battery. And of cause, the smaller the battery the better, because here it's just a energy source for a few seconds and smaller is saver.
Thanks for answering!
Matthias
On the first page you say:
The 062535 I can only find somewhere in Asia.
So I looked further in the thread and there I found, that I can use any battery (3,7V, LiPo) that has a over- and undercurrent and charging protection. Is this correct?
I wanted to be sure because any battery with protection is easy to find anywhere on the planet, but I don't want my expensive DAC to be fried when the LiPo catches fire. From this point of view another battery time would be preferred, but as I understand is this a design choise of the BBB team.
What is the maximum charging current? I ask this to chose a battery so that the charging current is max 1C for the battery. And of cause, the smaller the battery the better, because here it's just a energy source for a few seconds and smaller is saver.
Thanks for answering!
Matthias
If I may add another battery question: J1 needs to be in place to charge the battery via Hermes. However, with J1 in place, the BBB 5v barrel connection doesn't work. If I wanted to normally use a decent power supply and connection into BBB, but also retain the ability to use the 5v barrel connector on BBB in some situations, what would be the best configuration to power Hermes/BBB? [It is simple enough to add a separate battery charge circuit, which seems stable and reliable.]
Interesting! With my boards running stably and 5v into the barrel connector, I can use a wire to short the J1 pads and the result is that the BBB immediately reboots. If J1 is bridged by solder the operating system is never established. Using a backup BBB, I see that this behavior likely depends on whether TP5-TP8 on BBB is linked to Hermes (next to the J1 pads) via the square 4-pin connector. Without that 4-pin connection, shorting J1 has no effect on the BBB. I don't recall reading what TP5-TP8 provide to Hermes. Is that connection an error on my part?
BTW, I have taken caution to insulate the top of the aluminum standoff from the BBB up to the underside of Hermes - the one nearest the BBB barrel connector. The aluminum from the standoff could short the power trace on the under side of Hermes.
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Strange indeed. I have J1 pads shorted, soldered, the 4-pin connector is installed, and I power the BBB via the 5V barrel connector. This is the configuration I have been using since June. Starts up and shuts down fine, with one exception, when shut down two of the four blue leds on the BBB stay lit, steady not blinking.
When I read your insulating of the standoff 'tween the BBB & Hermes I thought perhaps that was keeping the blue leds on. So, I completely removed that post to check it out. Didn't make a difference, leds still on after shutdown.