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Search: Posts Made By: NiHaoMike
Forum: Solar Power 10-30-19, 11:42 PM
Replies: 72
Views: 48,159
Posted By NiHaoMike
That voltage is right in the range to run a...

That voltage is right in the range to run a switching power supply from. Just add a connector to allow easy connection if needed.

Most likely the easiest/cheapest way to build a power tap device...
Forum: Geothermal & Heat Pumps 09-16-19, 09:29 PM
Replies: 4
Views: 330
Posted By NiHaoMike
Pretty much all ECM pumps are designed to be...

Pretty much all ECM pumps are designed to be variable speed.
Forum: Appliances & Gadgets 08-24-19, 02:33 PM
Replies: 38
Views: 1,709
Posted By NiHaoMike
You'll have to short the data lines to each other...

You'll have to short the data lines to each other to signal fast charging and adjust the voltage to a bit above 5V, probably 5.2V or so would be ideal. Also, if you're putting USB-C sockets on the...
Forum: Appliances & Gadgets 08-22-19, 08:35 PM
Replies: 38
Views: 1,709
Posted By NiHaoMike
Just one fuse at the battery is all you need for...

Just one fuse at the battery is all you need for your setup. If it's still 15W, a 7.5A or 10A fuse will give plenty of margin.
Forum: Other Improvements 08-22-19, 08:32 PM
Replies: 5
Views: 282
Posted By NiHaoMike
12V bilge pumps are very common and quite cheap.

12V bilge pumps are very common and quite cheap.
Forum: Appliances & Gadgets 08-04-19, 08:43 PM
Replies: 38
Views: 1,709
Posted By NiHaoMike
Just build a dual comparator circuit with one...

Just build a dual comparator circuit with one output to trigger around 3.15V and another around 3.45V. That will give an easy indication of low and high charge. If you want more accuracy, you'll have...
Forum: Appliances & Gadgets 08-02-19, 08:33 PM
Replies: 38
Views: 1,709
Posted By NiHaoMike
It's a 555 in an adjustable duty cycle...

It's a 555 in an adjustable duty cycle configuration driving a buck converter.
Forum: Appliances & Gadgets 08-01-19, 09:14 PM
Replies: 38
Views: 1,709
Posted By NiHaoMike
From my experience, that sort of simplistic MPPT...

From my experience, that sort of simplistic MPPT controller is not very good and a 555 will be way better.

At 20W and low voltage, it would probably make sense to build your own solar panel. Go...
Forum: Appliances & Gadgets 08-01-19, 01:03 AM
Replies: 38
Views: 1,709
Posted By NiHaoMike
From a quick search, it looks like 1S LiFePO4 BMS...

From a quick search, it looks like 1S LiFePO4 BMS boards are hard to come by, but 4S LiFePO4 BMS boards are really common. If the 4 cells are closely matched, you can just go for a 4S pack, would...
Forum: Solar Power 07-12-19, 11:24 PM
Replies: 4
Views: 317
Posted By NiHaoMike
I think they're referring to the white plastic...

I think they're referring to the white plastic covering the back side of the panel for electrical insulation. No idea why it's white, since making the back side black would help to radiate heat. (I'm...
Forum: Solar Power 07-03-19, 09:12 PM
Replies: 55
Views: 48,940
Posted By NiHaoMike
Looks like someone finally built a working proof...

Looks like someone finally built a working proof of concept!
https://www.youtube.com/watch?v=R_g4nT4a28U
Forum: Appliances & Gadgets 04-18-19, 06:51 PM
Replies: 5
Views: 660
Posted By NiHaoMike
Add a drop of threadlock glue to stop it from...

Add a drop of threadlock glue to stop it from coming out again.
Forum: Other Improvements 02-07-19, 07:25 PM
Replies: 15
Views: 1,251
Posted By NiHaoMike
Read up on how relative humidity works and...

Read up on how relative humidity works and therefore why HRVs do work as dehumidifiers during the winter.
Forum: The Billiards Room 02-04-19, 10:31 PM
Replies: 7
Views: 1,024
Posted By NiHaoMike
Another option that recently came out is the...

Another option that recently came out is the ESP32 camera.
https://hackaday.com/2019/02/02/cheap-esp32-webcam/
Forum: Conservation 01-16-19, 09:27 PM
Replies: 4
Views: 695
Posted By NiHaoMike
Just leave it in heat pump mode.

Just leave it in heat pump mode.
Forum: Tools 01-07-19, 09:25 AM
Replies: 8
Views: 1,142
Posted By NiHaoMike
I don't have a TS100 yet, but several of my...

I don't have a TS100 yet, but several of my friends like them. The best battery to use is a 5S or 6S pack with built in BMS, for example external battery packs for laptops and power tool batteries.
...
Forum: Conservation 01-02-19, 07:01 PM
Replies: 6
Views: 784
Posted By NiHaoMike
Find a used UPS that takes a single 12V battery...

Find a used UPS that takes a single 12V battery and just connect it.
Upgrade your UPS! (with some car batteries...) (http://dansdata.com/upsupgrade.htm)
Forum: Tools 12-27-18, 11:11 PM
Replies: 8
Views: 1,142
Posted By NiHaoMike
TS100 is a great choice and easily runs from...

TS100 is a great choice and easily runs from batteries for portability.
Forum: Solar Power 12-13-18, 12:03 AM
Replies: 51
Views: 15,867
Posted By NiHaoMike
20V gate IGBTs are pretty unusual. Most common...

20V gate IGBTs are pretty unusual. Most common are 10V to 15V on and 0 to -10V off, the latter being especially variable depending on application - generally high speed switching of more than a few...
Forum: The Billiards Room 12-10-18, 12:31 AM
Replies: 7
Views: 711
Posted By NiHaoMike
DIY electronics, embedded programming, FPGA...

DIY electronics, embedded programming, FPGA programming, and cryptocurrency mining are just a few that come to mind.

Recently got into the ESP32 and I actually found a bug in the stable branch of...
Forum: The Billiards Room 10-07-18, 11:56 AM
Replies: 8
Views: 1,213
Posted By NiHaoMike
Electrical Engineer.

Electrical Engineer.
Forum: Conservation 09-08-18, 12:24 PM
Replies: 34
Views: 4,470
Posted By NiHaoMike
Why not use infrared heat lamps for secondary...

Why not use infrared heat lamps for secondary heat? Pretty much instant response, very easily throttled with an ordinary light dimmer, and are very good at delivering the heat where it's needed.
...
Forum: Other Improvements 08-29-18, 10:34 AM
Replies: 12
Views: 1,360
Posted By NiHaoMike
It's the voltage that determines the current for...

It's the voltage that determines the current for a power level. DC actually works favorably here.

My idea was to disconnect one of the services to avoid having to pay for the service charge twice....
Forum: Other Improvements 08-27-18, 09:12 AM
Replies: 12
Views: 1,360
Posted By NiHaoMike
How much is the service charge? You might be able...

How much is the service charge? You might be able to save that if you do an interconnect between the houses. How practical it would be to have the interconnect in the first place would depend greatly...
Forum: Solar Heating 08-10-18, 06:11 PM
Replies: 10
Views: 8,861
Posted By NiHaoMike
My experience with those bathtubs is that the...

My experience with those bathtubs is that the pump is already enough to cause the water to heat up over time.
Showing results 1 to 25 of 500

 
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