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💬 MySX Power Board 18650

openhardware.io 23 Jan 2021, 11:33 last edited by openhardware.io 27 Jan 2021, 19:53

https://www.openhardware.io/view/8243/MySX-Power-Board-18650
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18 Jan 2016, 15:27

@fets So far, I have only built the 5x5 board (but the others should be schematically identical). The only issue I have found so far is that I cannot get the ISP port to work. But I have checked and I have an identical setup on the 1.0 board and that worked, so I suspect the programmer is too weak to drive the net on this one. So it is not a board-issue per se, and might only be an issue on the 5x5 board as routing is the most complex on that one due to the size.
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@bisschopsr I now have the schematics posted for all of my boards. I also posted another board for my in-wall scene controller line. Is there any other pics or information that you think might be useful to others for any of these boards?
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Hardware • power voltage voltage divider • 23 Jul 2016, 16:53 • CrankyCoder 24 Jul 2016, 20:02

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@Jason-Brunk small value resistors can do the trick but you better try two silicon diodes 1N4001 or similar in series with the power line. Each diode give you around.0.7 volt drop.
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13 Oct 2023, 23:49

Hi all, Should anyone face the same problem, I found the root cause: brownout threshold. I burned a new bootloader (Optiboot 8.0) without such trigger and the node has been working with used batteries (~2.7V) since May. Hope this helps.
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Hi @koresh - I had a little accident on the AC side :-). I was wondering what values the 2 resistors (TH and SMD) and diode are ? Thanks!
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@anticimex You are too fast Now the CERN files are uploaded!!
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30 Dec 2019, 12:55

@ceech I really like this design, however I think it has a problem: According to the datasheet the TPS610986DSET has no feature to disconnect the load at low battery voltages. I think the result will be that e.g. a ESP32 or other power hungry chips will not power up properly. The TPS63031 might therefore be a better fit. btw.: Do you still sell assembled versions of this design? Would you be willing to create a new version with the TPS63031 and probably also with 10 or 20F capacitors or an board to solder your own capacitors. Best regards Tobias

💬 MySX Power Board 18650

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💬 EFEKTA WIRELESS TEMPERATURE & HUMIDITY SENSOR V1 | nRF52840 OpenHardware.io • battery temperature & humidity sensor nrf52840 • 29 May 2020, 16:35 • openhardware.io 29 May 2020, 16:35

💬 In-wall scene controller PSU OpenHardware.io • mysensors power supply scene controller wall switch dbemowsk • 23 Dec 2017, 20:00 • openhardware.io 1 Jan 2018, 15:41

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💬 JMP Arduino Pro Mini Multisensor Board v2.1 OpenHardware.io • nrf24l01 rfm69 battery mysensor node battery sensor tp4056 multisensors • 20 Feb 2018, 21:45 • openhardware.io 6 Mar 2018, 11:55

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💬 MySensors node
OpenHardware.io • mysensors arduino nrf24l01 rfm69 temperature battery humidity atsha204a flash mysx1.5 • 7 Jan 2016, 14:34 • openhardware.io 18 Jan 2016, 15:27

💬 EFEKTA WIRELESS TEMPERATURE & HUMIDITY SENSOR V1 | nRF52840
OpenHardware.io • battery temperature & humidity sensor nrf52840 • 29 May 2020, 16:35 • openhardware.io 29 May 2020, 16:35

💬 In-wall scene controller PSU
OpenHardware.io • mysensors power supply scene controller wall switch dbemowsk • 23 Dec 2017, 20:00 • openhardware.io 1 Jan 2018, 15:41

Voltage divider for radio
Hardware • power voltage voltage divider • 23 Jul 2016, 16:53 • CrankyCoder 24 Jul 2016, 20:02

Sudden battery drain - Pro-mini + RFM69
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💬 JMP Arduino Pro Mini Multisensor Board v2.1
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OpenHardware.io • power supply boost converter supercap • 5 Jul 2017, 09:25 • openhardware.io 30 Dec 2019, 12:55

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Online

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