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Search: Posts Made By: NiHaoMike
Forum: Appliances & Gadgets 08-22-19, 07:35 PM
Replies: 29
Views: 779
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, 07:32 PM
Replies: 2
Views: 75
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, 07:43 PM
Replies: 29
Views: 779
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, 07:33 PM
Replies: 29
Views: 779
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, 08:14 PM
Replies: 29
Views: 779
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, 12:03 AM
Replies: 29
Views: 779
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, 10:24 PM
Replies: 4
Views: 191
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, 08:12 PM
Replies: 55
Views: 47,849
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, 05:51 PM
Replies: 5
Views: 454
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, 06:25 PM
Replies: 14
Views: 870
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, 09:31 PM
Replies: 7
Views: 917
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, 08:27 PM
Replies: 4
Views: 493
Posted By NiHaoMike
Just leave it in heat pump mode.

Just leave it in heat pump mode.
Forum: Tools 01-07-19, 08:25 AM
Replies: 8
Views: 951
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, 06:01 PM
Replies: 6
Views: 626
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, 10:11 PM
Replies: 8
Views: 951
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 12-12-18, 11:03 PM
Replies: 51
Views: 15,353
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 12-09-18, 11:31 PM
Replies: 7
Views: 594
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, 10:56 AM
Replies: 8
Views: 841
Posted By NiHaoMike
Electrical Engineer.

Electrical Engineer.
Forum: Conservation 09-08-18, 11:24 AM
Replies: 33
Views: 3,666
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, 09:34 AM
Replies: 12
Views: 1,203
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, 08:12 AM
Replies: 12
Views: 1,203
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, 05:11 PM
Replies: 10
Views: 8,636
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.
Forum: Solar Power 08-06-18, 06:14 PM
Replies: 17
Views: 1,417
Posted By NiHaoMike
Use MOSFETs or IGBTs for switching. Or for the...

Use MOSFETs or IGBTs for switching. Or for the simplest temporary solution for space heating, leave the heaters connected at all times during the winter and open a window as needed to vent excess...
Forum: Conservation 08-06-18, 06:08 PM
Replies: 159
Views: 19,782
Posted By NiHaoMike
Do you have any dedicated freezers? Install...

Do you have any dedicated freezers? Install relays to bypass the thermostat when the charge level is very high. Also set the water heater to a higher temperature during that time, if it's electric or...
Forum: Appliances & Gadgets 07-18-18, 03:12 PM
Replies: 8
Views: 880
Posted By NiHaoMike
What sort of volume are you trying to target? If...

What sort of volume are you trying to target? If it's in the few dozens, you can probably reverse engineer a few window A/Cs, pick one that's easiest to convert, then devise a setup for quickly doing...
Showing results 1 to 25 of 500

 
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