Solar Powerbank. DIY by kiwibloke

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· @kiwibloke ·
$16.17
Solar Powerbank. DIY
<center>![](https://i.imgur.com/v5GIQDe.jpg)
_powerbank DIY prototype_</center>

#### This design was created because I needed a portable 12Vdc supply to power my underwater LED fishing lights. As this is a seasonal pastime, to make better use of the project I added LED lighting and 5V USB out, ideal for camping.

<center>My Links: [Steemit Blog](https://steemit.com/@kiwibloke) |	[Staying Active](https://taramai.nz) | [Steem Riders](https://ridersonthesteem.engrave.website/) |  [Strava](https://www.strava.com/athletes/48844017)</center>

<center>![](https://i.imgur.com/S9hXknE.jpg)
_3 sides of the case_</center>

I have quite a collection of unused VHS cases, a bit large for a project like this but the solar panels I had, 165 x 135 mm fitted perfectly (totally unplanned).

<center>![](https://i.imgur.com/4oLE4UI.jpg)
_diagram of connections_</center>

I'll briefly explain this prototype:
- the USB charger module is the heart of this project. With this I can recharge the batteries via the solar panel or a USB mini cable.
- the voltmeter is not needed I just put it in to read the charging voltage (cheap enough it can stay there)
- the boost module gives me the 12Vdc I needed regardless of the input voltage controlled by switch 1, which also controls to 5V USB Out.
- switch 2 determines whether I want the 12V DC Out on **OR** switch on the LED lights. Using this configuration saves me the cost of another switch, not convinced this was a good idea.

Time to build it ...

<center>![](https://i.imgur.com/Yp7B3jg.jpg)
_layout_</center>

Pretty rough I know, plonk the bits inside the case using a glue gun then solder in the wires. The holes were made by pushing a heated soldering iron tip through the soft plastic case.

---

### Testing Prototype

Charging
- via solar: yes
- via USB: yes

Discharging
- 12V DC at RCA plugs: yes (fishing lights worked fine)
- 5V USB Out: yes (charged my mobile phone)
- 9 LED lights on case: yes

I removed the Green SMD LED from the USB Charger Module, put a 3mm Green LED on the case then connected back to the module. This gives an external indication that the batteries are fully charged.

---

#### I made a 2nd Powerbank ...

<center>![](https://i.imgur.com/TPyCNtK.jpg)
_a few changes made on this one_</center>

This one definitely looks a lot better, using strip LEDs and push switches gave the project cleaner lines. I didn't use the 12V DC Out on this one, no point in having 2 identical Powerbanks.

<center>![](https://i.imgur.com/X7S2eqy.jpg)
_unexpected bonus_</center>

I can remove 2 batteries and place them in my headlamp when required. Using the headlamp instead of walking around with this VHS case in hand is so much better. The 2 remaining batteries can still be used as intended, the Powerbanks capacity is reduced by 50%. The next Powerbank I make will have 6 batteries, once I obtain them.

#### Thoroughly enjoyed making these ....

---

CRYPTO | Wallet Support
--- | ---
ETHEREUM | 0x23Bd7B699383D96513636bf145dCc272a1502076
STEEM | 0x4493de75192e5210091c71506465E31BF5038338
BAT | 0x6fE7EC6B8bB98210468a15B3235abC80edB70b3d

<center>
[![Follow Me on Steemit](https://i.postimg.cc/2y5VPN2t/Follow-Me12-320.gif)](https://steemit.com/@kiwibloke)
_click on image to take you to my Steemit page_
</center>

- with every post comes experience, as we all strive to do better.
- curate/up vote, let's encourage and inspire each other.

***
<center><sup>Originally posted on [Staying Active Body and Mind](http://taramai.nz/solar-powerbank-diy). Steem blog powered by [ENGRAVE](https://engrave.website).</sup></center>
👍  , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and 473 others
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vote details (537)
@monsterjamgold ·
👍You have received a 100% upvote with over 19k of build token, please keep up the good work and embrace the http://www.build-it.io community.
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@curie ·
Congrats on a Curie vote!
Hi kiwibloke,
<div class="pull-right">
https://steemitimages.com/DQmXgrYG8AKimJKRSu2urPB5SPcftN6GCGx2gVJJMwBkuTu/Curie%20Logo%2075px.png
</div>
This post  has been upvoted by the Curie community curation project and associated vote trail as exceptional content (human curated and reviewed).  Have a great day :) <br>
 
Visit <a href="http://curiesteem.com/">curiesteem.com</a> or join the <a href="https://discord.gg/G6RPUMu">Curie Discord community</a> to learn more.
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@marcybetancourt ·
Very interesting this solar bank. I ask you about the construction plan: if you use 8 batteries, how much time do you have light? And I did not understand how the usb module changer works with the solar panel. Regards @kiwibloke
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@kiwibloke ·
Here's an EBAY link to the new version of a [18650 Lithium Battery Charging Board](https://www.ebay.com/itm/10PCS-5V-Micro-USB-1A-18650-Lithium-Battery-Charging-Board-Charger-Module/201039030988?hash=item2ecedc2acc:g:B6AAAOSwj9lZuLKp) with a better battery protection. This charges Li-Ion batteries (in parallel)  as is (without the solar panel) using a micro USB cable.

<center>![18650 Charger Module (200x316).jpeg](https://cdn.steemitimages.com/DQmUDkiouwZQC5JXedwAg2dTaKofWdxsmkQEE2EjjLYUddu/18650%20Charger%20Module%20(200x316).jpeg)
_18650 Micro USB Lithium Battery TP4056 Charger Module_</center>

If you look at the Micro USB socket at the top of the board, it has -ve and +ve 5V terminals either side of this socket. This is the point where we connect the solar panel, you need to ensure the solar panel delivers 5V at this point. Depending on the solar panels max output you can use diodes in series (cheapest), or a 5V buck step down converter (ideal), or a LM7805 voltage regulator.

### Always use blocking diodes when working with Solar Panels!

---

I use 4 batteries recovered from discarded laptop battery packs, when I run the fishing lights at night, 36 LEDS, it lasts all night (10hours)

<center>![LED Fishing Lights(465x240).jpeg](https://cdn.steemitimages.com/DQmYy8qYYdc9hBuuLeHZt1SLgaC5sunrCVRoXFEFk4Ap1Xy/LED%20Fishing%20Lights(465x240).jpeg)
_my Solar Powerbank with Underwater LED fishing lights_</center>

---

hope this helps ...
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@marcybetancourt ·
36 hours long ... magnificent!
Ok, I already understood the scheme is in parallel.
Thanks for your kind reply
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@road2horizon ·
you did a great job with your video with this construction, now you will have a great charge for your fish !! congratulations on your curie vote
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@ivanm7 ·
Congratulations @kiwibloke, your post has been featured in the latest [Curie Author Showcase](https://steemit.com/art/@curie/curie-author-showcase-february-13-2020).
On behalf of @curie I thank you for your time and for creating amazing content. Keep up the good work!
Sincerely,
Ivan (@curie curator)
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@chekohler ·
This is so freaking epic! Where are you and why are you not selling this in South Africa? Lol we cant keep the lights on for a full 24 hours here we need people like you! 
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@build-it.daily ·
**Congratulations @kiwibloke!**

**Your post was featured on our [daily build newsletter](https://www.build-it.io/build-it/@build-it.daily/the-daily-build-s-12-or-a-curated-daily-newsletters) We've sent 100 liquid BUILD tokens to your wallet upon which you can sell, trade or buy on [steem engine](https://steem-engine.com/?p=tokens) or [SteemLeo](http://dex.steemleo.com/market/BUILD). We've also shared your work on our [Instagram](https://www.instagram.com/p/B8j4-fsHiYC/), [Facebook](https://web.facebook.com/build.it.DIY.official/photos/a.125396825532033/196846985053683/?type=3&theater), and [Twitter](https://twitter.com/BuildIt_DIY/status/1228414784586047493) pages for more exposure.**

**Keep sharing your awesome DIY and How-to tutorials together with the recommended tags #diy, #build-it, #how-to, #doityourself, #build as well as posting from our [website](https://www.build-it.io/)**

**<center> Login our [website](https://www.build-it.io/) to claim your rewards! </center>**

*<center>Cheers!</center>*

<center> https://media.giphy.com/media/nbJUuYFI6s0w0/giphy.gif </center>
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@iamsaray ·
Wao that's great! An instrument not so difficult to make and that helps a lot in society and nature
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