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Unnamed Design by Lutkeveld (Development Thread)

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carlosdelondres View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote carlosdelondres Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2017 at 9:01am
Is the battery board a balance charger as well?
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lutkeveld View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lutkeveld Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2017 at 9:23am
Originally posted by carlosdelondres carlosdelondres wrote:

Is the battery board a balance charger as well?
Yes sir, you connect a series charger and the board does the rest. Really a plug and play system. No soldering required. Batteries go in like this: 


More details on the battery management system here:
http://www.ti.com/lit/ds/symlink/bq76925.pdf
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Padde298 Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2017 at 10:26am
Thumbs Up
I like it more and more!!!
LOUDER!!! MO BASS
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shortrope Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2017 at 5:00pm
Excellent...look forward to the finished product.
My Tinnitus is coming along nicely!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote carlosdelondres Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2017 at 7:36pm
Looks great, I assume it will be easy to parallel multiple boards? Been looking for something like this that can handle 6S :)
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lutkeveld View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lutkeveld Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2017 at 9:25pm
Yes, you can wire multiple boards in parallel or even stack them for increased capacity
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lutkeveld Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2017 at 9:53pm
Small update:
Still have not send out the next revision. Found some issues and points of improvements. Improved:
-More efficient (synchronous) DC-DC converter
-Added power switch for the amplifier, shutdown current was too high (200uA)
-Added zeners to protect the mosfets from blowing up on 20V+
-Added reverse polarity protection
-Fixed issue with stacking, making it easier but limiting it to 4 channels total

Here a cool render for in the meantime. New PCBs should arrive within 2 weeks:




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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hemisphere Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2017 at 10:16pm
Great to hear this project is still moving along. Looks tiny!
Phase 1: Post on Speakerplans
Phase 2: ?????
Phase 3: Profit!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lutkeveld Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2017 at 10:24pm
62x36mm! Smaller than a credit card.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hemisphere Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2017 at 10:31pm
Perhaps you could call it Cardioid Approve

.. Actually that's a lot smaller than a credit card. Less than 2/3.

There's gotta be a better standardised object to compare it to.

A playing card is 2.5" across or 63.5mm so that would be a good reference for scale.


Edited by Hemisphere - 27 November 2017 at 10:43pm
Phase 1: Post on Speakerplans
Phase 2: ?????
Phase 3: Profit!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Padde298 Quote  Post ReplyReply Direct Link To This Post Posted: 28 November 2017 at 9:19am
Originally posted by lutkeveld lutkeveld wrote:

62x36mm! Smaller than a credit card.
 ShockedShockedShocked

WHAT..? 62x36 mm, and you still have all this..:

-Onboard programmable DSP
-high power class D amplifier
-Bluetooth 3.0
-Microcontroller for all kinds of tasks

Based on:
-TAS5754M: 2x50W max class D amplifier with onboard programmable DSP with functions like dynamic bass boost, psycho acoustic bass enhancement, softclipping, dynamic range limiting and 5 biquads per channel

Let me know when ordering is possible! ClapClapClapClap
LOUDER!!! MO BASS
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lutkeveld View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lutkeveld Quote  Post ReplyReply Direct Link To This Post Posted: 08 December 2017 at 2:00pm
New PCBs arrive 12 december. I really hope that the PCBs will pass compliance testing with the FB filter, an LC filter would be much bigger and more expensive. Maybe if they don't pass I will still sell those 8 pieces for the DIY market, they would still work well but just not within the strict limits of the CE/FCC.
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