Hello Guys
Could you please explain me how to deal with:
I have JAB2, JAB3 and SURE AA-JA11113 Extension Board with 3 batteries (18650). From Sure's videos it says that if I want to power up this two boards I need connect them both to SURE AA-JA11113 with 3 batteries, but also it says that if you want to charge your batteries with Extension Board, you need to connect it only to JAB2! For me its stupid or I do not understand it. Because if I have all this boards inside sealed enclosure its not possible to disconnect Extension Board from JAB3 during charging.
So my question is: how I can connect this two boards with Extension Board with 3 batteries (to power up by using 3 * 18650) and at the same time with possibility to charge the batteries and power up the system with external adaptor?
Thank you!
Could you please explain me how to deal with:
I have JAB2, JAB3 and SURE AA-JA11113 Extension Board with 3 batteries (18650). From Sure's videos it says that if I want to power up this two boards I need connect them both to SURE AA-JA11113 with 3 batteries, but also it says that if you want to charge your batteries with Extension Board, you need to connect it only to JAB2! For me its stupid or I do not understand it. Because if I have all this boards inside sealed enclosure its not possible to disconnect Extension Board from JAB3 during charging.
So my question is: how I can connect this two boards with Extension Board with 3 batteries (to power up by using 3 * 18650) and at the same time with possibility to charge the batteries and power up the system with external adaptor?
Thank you!
Thank you!
I think I get it
other question concerning powering up amplifiers with 3 * 18650
Working voltage for Sure's amplifiers 9-24V, with batteries I have 11-12.6V, so it means, the lower power voltage, the lower output power?
I tried to feel the difference, powering up with batteries and external 19V but I did not hear the difference...
Hi Sorokin, hi ernperkins,
Disclaimer : I don't have a batteries extension board myself (neither a JAB2 board), so my answers are from what I understood reading documentation about JAB2 / JAB3.
This being said :
JAB2 include a battery charger (and a solar MPPT).
JAB3 can be powered from batteries extension board, but cannot charge them.
I don't think plugging the battery board to both JAB2 and JAB3 will be a problem.
JAB2 will charge it, JAB3 will just draw power from it...
From what I understand they just say "Take care, if you use battery board with JAB3 alone, it wont charge".
In order to be able to charge, you need a power supply over 12.6 V.
"the lower power voltage, the lower output power?"
Yes, at full power...
At mid levels, or if your source level, is too low, you shouldn't hear the difference.
Disclaimer : I don't have a batteries extension board myself (neither a JAB2 board), so my answers are from what I understood reading documentation about JAB2 / JAB3.
This being said :
JAB2 include a battery charger (and a solar MPPT).
JAB3 can be powered from batteries extension board, but cannot charge them.
I don't think plugging the battery board to both JAB2 and JAB3 will be a problem.
JAB2 will charge it, JAB3 will just draw power from it...
From what I understand they just say "Take care, if you use battery board with JAB3 alone, it wont charge".
In order to be able to charge, you need a power supply over 12.6 V.
"the lower power voltage, the lower output power?"
Yes, at full power...
At mid levels, or if your source level, is too low, you shouldn't hear the difference.
I tried making an active 2-way WiFi speaker with the JAB3-250, but ran into some issues that dampened my enthusiasm for this product. The main problem is that the board has a microprocessor dedicated to making the amplifier "battery friendly", and that circuitry isn't compatible with the way my software for the ADAU1701 works. The write-up is in this link
.
.
Last edited:
Thanks for the guide!
Ok, late night and just tried programmin JAB3 with ICP1 a minute ago.
I was a bit confused about SW1 since there is one on ICP1 as well, and from the guide videos they seem to be flicking a switch not using jumper cables.
There is indeed SW1 on JAB3 PCB near the pots. Use jumper cable to short it, as said, and then use the JAB3 reset switch, as said, not the ones on ICP1. Don't touch ICP1 other than plug the cables as per the guide.
ps. the Sure Sigmastudio example project linked on this thread had outputs at wrong order: mono (sub) signal went to JAB2 and vice versa. I removed most of the controls and put my own filters in, didn't try to use the pots for anything yet in the Sigmastudio. Noisefloor seems to be worse now or I'm just too tired already
I'll post my tips later, when I get more hours under my belt on the sigmastudio and my setup.Hi guys,
I've been playing with one of the JAB3 2 x 50w boards, and I've hit a bit of an odd issue.
I've made a fairly simple sigmadsp config, uploaded it and it all works great, saved to eeprom with no problems, but if i hit the reset switch on the board, or unplug the power and plug it back in again, the board is just mute until i re-upload the sigmadsp config again, and it starts working as normal.
Anyone able to shed some light?
I've been playing with one of the JAB3 2 x 50w boards, and I've hit a bit of an odd issue.
I've made a fairly simple sigmadsp config, uploaded it and it all works great, saved to eeprom with no problems, but if i hit the reset switch on the board, or unplug the power and plug it back in again, the board is just mute until i re-upload the sigmadsp config again, and it starts working as normal.
Anyone able to shed some light?
By your description i feel the program is not written to the EEPROM. Did you do the progamming as per hermes36 guide I have quoted few posts back? If I remember the board is muted if the SW1 is shorted while reseting. SW1 needs to be shorted only when writing to EEPROM, as per Hermes36 guide.
Sorry, haven't had this issue so cannot give more accurate guidance
Sorry, haven't had this issue so cannot give more accurate guidance
Last edited:
Good thought, but nope, that doesn't seem to be the issue.
The boards now stopped writing to eeprom (my adau1701 dsp board works fine, I'm fairly familiar with the work flow) just throws up an error message now when I copy to e2prom
There is a little bit of documentation here that might help: JAB-250 WiFi Speaker – Audiodevelopers Reborn
The JAB3 board uses a transistor to turn off the DVDD voltage to the ADAU1701 to conserve the battery (Q2). And there is microprocessor that monitors audio activity, and it will turn off DVDD when it detects no activity. When the voltage is restored, the ADAU1701 goes through its reset sequence.
The ADAU1701 will self-boot from the program in the EEPROM if there is a valid program and if SELFBOOT is high and WP is high. Since you have checked the EEPROM data, I would assume that there is a problem with WP (from the datasheet: "The ADAU1701 does not self-boot if WP is set low.") The SELFBOOT pin is pulled up by a resistor on the board, so it should be OK. But double-check WP.
Of course, the I2C bus must be "free" for the chip to self-boot. The JAB3 board has some diode protection on the I2C lines that can fail if 5V is used to program the device (U01). I had one board where the diodes shorted, but I was only using 3.3V, so I don't know what actually happened. Make sure the I2C bus looks good on an oscilloscope, with normal 0 to 3.3v transitions. On one board that failed this way, I simply removed U01 by snipping the legs, and the board worked fine afterward.
The JAB3 board uses a transistor to turn off the DVDD voltage to the ADAU1701 to conserve the battery (Q2). And there is microprocessor that monitors audio activity, and it will turn off DVDD when it detects no activity. When the voltage is restored, the ADAU1701 goes through its reset sequence.
The ADAU1701 will self-boot from the program in the EEPROM if there is a valid program and if SELFBOOT is high and WP is high. Since you have checked the EEPROM data, I would assume that there is a problem with WP (from the datasheet: "The ADAU1701 does not self-boot if WP is set low.") The SELFBOOT pin is pulled up by a resistor on the board, so it should be OK. But double-check WP.
Of course, the I2C bus must be "free" for the chip to self-boot. The JAB3 board has some diode protection on the I2C lines that can fail if 5V is used to program the device (U01). I had one board where the diodes shorted, but I was only using 3.3V, so I don't know what actually happened. Make sure the I2C bus looks good on an oscilloscope, with normal 0 to 3.3v transitions. On one board that failed this way, I simply removed U01 by snipping the legs, and the board worked fine afterward.
Last edited:
Hello Neil, thank you for this write up. I had also in mind a 2-way implementation with this board, however somewhat easier than yours appear to be. I intend to use two boards (one in each speaker) with crossover and 100% volume programmed to eeprom. Volume and music will be set with chromecast audio. Does this pose a problem with the built in battery functions? I think not as upon resumed playback eeprom will simply initiate crossover and 100% volume.
Thanks in advance
If I understand you correctly, what you want to do should work fine.
I need to finalize that design by doing what I described in the last paragraph of that article. I need to write the Arduino code to store the SigmaStudio program in the EEPROM. That way, the on-board micro will still manage the power-down functions, but when power is restored, the SigmaStudio program will reload my code from the EEPROM. It's easy to do, and I've got a spare board to test the changes--just haven't gotten to it.
With that simple code change, you could then control the DSP from the cell phone app. You wouldn't need SigmaStudio or the programmer, as the Arduino does the programming. I think this would then be a very useful board for building 2-way active speakers.
I need to finalize that design by doing what I described in the last paragraph of that article. I need to write the Arduino code to store the SigmaStudio program in the EEPROM. That way, the on-board micro will still manage the power-down functions, but when power is restored, the SigmaStudio program will reload my code from the EEPROM. It's easy to do, and I've got a spare board to test the changes--just haven't gotten to it.
With that simple code change, you could then control the DSP from the cell phone app. You wouldn't need SigmaStudio or the programmer, as the Arduino does the programming. I think this would then be a very useful board for building 2-way active speakers.
Indeed so do I. I dont plan to use an arduino. I simply want to configure a two-way crossover in SigmaStudio and use the programmer board to load the configuration to the eeprom. Once that is done, I hope that the speaker will *just work*. Configuration will not change after the initial setup and volume will be controlled externally. I think this is the easiest configuration.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.