Hermes does not power Cronus - but the other way around - Cronus powers the clean side of Hermes (with 3.3V). The 5V input of the Hermes is to power the BBB side of things.
Thanks for the clarification Russ, now I know I need 2 x 5v power supplies I can get on with designing this whilst awaiting the May shipment of my Hermes/Cronus/Rhea
Does not matter - use the type you prefer (not everyone likes to solder SMD)
By the way, is there any linux distro for the BBB, which works with the miero driver, but also does have the possibility of connection to a small 4-7" display to show what song is playing, samplerate and so on - pretty much the info you usually get through the phone/tablet apps. Perferably with working touchscreen to do the same, but if that is to much to ask, then at least to show what is playing right now.
This would for me be a big plus at least.
This would for me be a big plus at least.
you can follow this thread http://www.diyaudio.com/forums/pc-based/273684-another-raspberry-pi-radio.html , as rpi runs linux and mpd you can adapt the software (if rpi decides to share the code) to your specific hw display.
personally I use the phone/tablet to control bbb, including controling B3 volume thru i2c.
Yes, so what i want to have is just a display showing what is playing. Of course if it also works as control would be even better, but i would still like the android app-control also.
Hello,
I've received my Hermes and Cronus and started my soldering homework
I've read in some messages that resistors (SMD and/or "standard") are provided with the Cronus. Is it true ? I don't get any resistor in my package. I think I may have what is needed in my own stuff, but I don't know their values and where I should put them.
I don't know either how I can connect the Cronus to a I2S DAC, based on PCM5102.
Last question : where should I connect power supplies on both the Hermes and the Cronus ? Is the J1 connector on the Hermes shoud be connected to the TP5/6/7/8 on the BBK (I want to use a battery) ?
BTW, what is the status of the documentation ?
Many thanks in advance for your answers
Cheers,
Pascal
I've received my Hermes and Cronus and started my soldering homework
I've read in some messages that resistors (SMD and/or "standard") are provided with the Cronus. Is it true ? I don't get any resistor in my package. I think I may have what is needed in my own stuff, but I don't know their values and where I should put them.
I don't know either how I can connect the Cronus to a I2S DAC, based on PCM5102.
Last question : where should I connect power supplies on both the Hermes and the Cronus ? Is the J1 connector on the Hermes shoud be connected to the TP5/6/7/8 on the BBK (I want to use a battery) ?
BTW, what is the status of the documentation ?
Many thanks in advance for your answers
Cheers,
Pascal
It's a bit crude at the moment - but the API does allow full DAC control (via i2c)
The web app (which utilizes the API) will evolve over time - but right now I have it handling:
- Stereo and 8 channel Volume/Balance
- Quantizer/symmetry
- DPLL Bandwidth
- Source Remapping
I will make the code open source when I am ready.
Also the schematic for the Hermes-BBB will be open and public as my contribution back to the community - for whatever it is worth.
Cheers!
Russ
Hi!
Any progress on this?
BBB battery issue
Hello,
I installed a battery exactly as shown in post #1178. It worked beautifully, when shutting off DAC, the Hermes powered off, then after about 5 seconds, BBB shut down gracefully.
However, after only about 3-4 days it stopped working. When powering on my DAC, the BBB would not power-up. I found that the battery voltage had dropped to 1.8 volts while the system was off. I checked to see if there was any drain on the battery with it connected and the system off, and there was about 2-3mA of drain. That seems to be enough to drain the battery down to where it won't allow BBB to power-up, if the system has been off for a few days. I did not find anyone else on the TP forums here who reported this issue.
Any ideas what the problem might be?
Thanks,
Richard
Yes - the Hermes has all you need!
Hello,
I installed a battery exactly as shown in post #1178. It worked beautifully, when shutting off DAC, the Hermes powered off, then after about 5 seconds, BBB shut down gracefully.
However, after only about 3-4 days it stopped working. When powering on my DAC, the BBB would not power-up. I found that the battery voltage had dropped to 1.8 volts while the system was off. I checked to see if there was any drain on the battery with it connected and the system off, and there was about 2-3mA of drain. That seems to be enough to drain the battery down to where it won't allow BBB to power-up, if the system has been off for a few days. I did not find anyone else on the TP forums here who reported this issue.
Any ideas what the problem might be?
Thanks,
Richard
I have J1 connected to the BBB as outlined by Brian D. elsewhere in this thread or another TP thread, I don't remember where. The unit has been powered up for the past 2 days now and the battery voltage is back up to 3.64 VDC, so it is charging.
Russ,
I am using the same battery as you, the 062535 that I bought on ebay. At first I thought the battery was defective so I requested they ship me another which they kindly did--same thing happened with the second battery.
Russ,
I am using the same battery as you, the 062535 that I bought on ebay. At first I thought the battery was defective so I requested they ship me another which they kindly did--same thing happened with the second battery.
Sounds like a question for the BBB folks - as I can't replicate it. The charging cct is part of the BBB itself - the Hermes just connects directly to it. It does sound like your battery is discharging a bit much... under-voltage protection may not be working (I am not sure at what point it kicks in).
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