5 best power solutions for small projects



Are you interested in my way of powering small projects? After many discussions and evaluations, I created a favorite list with solutions for the five most popular use cases. Why did I choose them, and how can you build them? After the video, you should have a decision tree for your future projects.
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Links:
TTGO Boards: https://s.click.aliexpress.com/e/_AMIHC0
T-Beam: https://amzn.to/2W2NmaC
Small board without battery: https://s.click.aliexpress.com/e/_A29gvu or https://amzn.to/3h4Q4DD
Small board with battery support: https://s.click.aliexpress.com/e/_9JBlg2 or https://amzn.to/3BIrfoX
ESP32 WROOM : https://s.click.aliexpress.com/e/_AqoIE1 or https://amzn.to/3gdWKPt
Solar panel 6V : https://s.click.aliexpress.com/e/_9xQ3CD
Solar Panels 5 – 5.5V : https://s.click.aliexpress.com/e/_AfVbIz or https://amzn.to/3AKA01k
Voltage Regulator HT7333 : https://s.click.aliexpress.com/e/_ADLhEl
Power supplies (110-240V – 3.3V) : https://s.click.aliexpress.com/e/_A6pG3T
ESP32 Bare Bone PCB : https://s.click.aliexpress.com/e/_9J27wY
TP4056 : https://s.click.aliexpress.com/e/_9JEpb2 or https://amzn.to/3mfhhaa

Flow chart: https://drive.google.com/file/d/1oJCdEHmf03SkHnGSDLGGOvvTDBBSBPix/view?usp=sharing
FET Switch: https://newbedev.com/p-channel-mosfet-switch
Trigboard: https://www.kevindarrah.com/wiki/index.php?title=TrigBoard
MicroWakeUpper: https://github.com/tstoegi/MicroWakeupper

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25 thoughts on “5 best power solutions for small projects

  • September 5, 2021 at 9:02 am
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    Hi Andreas, thanks for the video and glad you’re back. How was your motorbike trip?

    Reply
  • September 5, 2021 at 9:02 am
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    Hi Andreas
    Ricoh Electronic Devices in Japan has launched a buck-boost DC-DC Converter with an integrated battery voltage monitor for IoT designs to measure the remaining charge left in the battery.

    The RP605 is aimed at applications in the Internet of Things (IoT), wearable devices and wireless communications modules that need a low level of current consumption to extend battery life.

    Reply
  • September 5, 2021 at 9:02 am
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    Hi Andreas, Did you ever try PKcell 3.6v as a battery supply without any regulator so you will avoid quiescent current as well

    Reply
  • September 5, 2021 at 9:02 am
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    Did you get your helium hotspots yet? Was hoping to see how you power them and also maybe even provide some Spiess solution for internet coverage. Thanks for awesome content as always. 🙂

    Reply
  • September 5, 2021 at 9:02 am
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    Nice overview. I use a 100W solar panel in combination with recycled 12V-7Ah lead acid batteries (2 to 4 in parallel). Endless power…
    Why the lead acid batteries ? I get them for free, so you can't beat the price.

    Reply
  • September 5, 2021 at 9:02 am
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    An automatic watering system for your garden would need some stand-by / sleep time, as you wouldn't need to check for soil moisture during the night.

    Reply
  • September 5, 2021 at 9:02 am
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    Hi Andreas, good to have you back in front of the first row! Your current favorite board at 2:18, which one is that?

    Reply
  • September 5, 2021 at 9:02 am
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    I'd be keen on hearing about your new version of the mailbox notifier. I've been considering building something like this myself since I rarely get mail, and checking it even every few days is often pointless, but I don't want to miss 'important' mail.

    Reply
  • September 5, 2021 at 9:02 am
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    Hi, great video. Have you a video in which you comment the problems about "only one mosfet" and why you change to the two mosfet version? Or could you comment ? Thanks.

    Reply
  • September 5, 2021 at 9:02 am
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    Wow, even though i've done my research about this topic, your video always inspiring, especially those summary. Thank you 🙂

    Reply
  • September 5, 2021 at 9:02 am
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    Must make a project power supply out of the 3000F 2.7V (3Wh) super capacitor and solar panel ring that I found washed up on a beach. The circuit board it came with seems to have issues. The boost regulators, of which there are 3 in parallel, seem to occasionally suffer from one getting warm with no apparent load.
    The bit I want to get right is the capacitor charging circuit, don't want to blow it up.
    If done right I see it having the potential to run a project self sufficiently for a decade or more. Expected to survive a million duty cycles.

    Reply
  • September 5, 2021 at 9:02 am
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    Hi Andreas, great video,
    You could include LiSOCl2 for lora nodes. I became mine this week and it seems very promising, 3,67V and 2600mAh for a aa battery. I will make some experimets in the next weeks.
    Liebe Grüße aus Südtirol

    Reply
  • September 5, 2021 at 9:02 am
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    very good video thank you! was also just wondering where is the flow chart as cannot seem to find it yet

    Reply
  • September 5, 2021 at 9:02 am
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    I've been designing around single cell lipo batteries for about a year now as i've been developing my invention and i've found that they do wonderfully if the power consumption is managed correctly. Integrating a lipo charger in the form of an MCP73831 is extremely easy and it can charge the batteries I use very very quickly. I just throw in an AMS 3.3V LDO (the same vreg found on the devkit modules) to verify proper regulation.

    That aside, the video is fantastic as always

    Reply
  • September 5, 2021 at 9:02 am
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    Regarding OLED display pinout: It seems "impossible" to know the Vcc/GND pinout on those OLEDs. I have ended up making solderbridges on my PCBs to select Vcc & GND.

    Reply
  • September 5, 2021 at 9:02 am
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    Something about the use of EEPROM. We had written a small library, with writes the information not allways at the same memory cells. If you do it right, the 10.000 cycles "problem" is gone. We had made a test – we wrote 1K blocks to an EEPROM about the size of 64k. The first data lost was around 2 Mio cycles 🙂 Detected with a simple CRC in the blocks. Something similar is done by the controllers of SD cards and USB Sticks.

    Reply
  • October 28, 2021 at 7:03 am
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