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Search: Posts Made By: NiHaoMike
Forum: Appliances & Gadgets 01-25-20, 11:29 PM
Replies: 2
Views: 52
Posted By NiHaoMike
I suggest asking EEVblog. It looks like a JST SH...

I suggest asking EEVblog. It looks like a JST SH but it's important to examine the connector carefully since I have seen variants with subtle differences specifically to prevent cross connections.
Forum: Solar Power 01-22-20, 07:18 PM
Replies: 2
Views: 75
Posted By NiHaoMike
The general consensus is that simply having more...

The general consensus is that simply having more panels at a fixed angle would be more cost effective. That's in reference to commercial trackers which are pretty expensive, but maybe a DIY version...
Forum: Tools 01-19-20, 01:55 PM
Replies: 19
Views: 281
Posted By NiHaoMike
If you still can't get it to work, how about...

If you still can't get it to work, how about convert it to run on propane?
Forum: Solar Power 01-04-20, 08:56 PM
Replies: 4
Views: 516
Posted By NiHaoMike
That's a pretty high estimate considering the...

That's a pretty high estimate considering the panels themselves are commonly available for well under $1/W in bulk. (In fact, $1/W isn't even a special deal for a single panel nowadays.)
Forum: Solar Power 01-03-20, 07:08 PM
Replies: 15
Views: 617
Posted By NiHaoMike
The high frequency noise it outputs is just like...

The high frequency noise it outputs is just like any other switching power supply, so simply trying to detect that will cause a lot of false positives. (I will also design the output filter to be...
Forum: Solar Power 12-30-19, 12:09 AM
Replies: 15
Views: 617
Posted By NiHaoMike
First try at prototyping the PLC transmitter...

First try at prototyping the PLC transmitter using 2x 74LV4046A. It works but the jitter is more than I like, giving a noisy signal. The CD4046, based on an older process technology, is rumored to...
Forum: Appliances & Gadgets 12-27-19, 06:41 PM
Replies: 4
Views: 197
Posted By NiHaoMike
You can manually turn down the backlight...

You can manually turn down the backlight brightness.
Forum: Solar Heating 12-23-19, 06:58 PM
Replies: 9
Views: 441
Posted By NiHaoMike
Nowadays, it's common to use chloramine (chlorine...

Nowadays, it's common to use chloramine (chlorine + ammonia) rather than chlorine alone.
Forum: Solar Power 12-21-19, 10:35 PM
Replies: 15
Views: 617
Posted By NiHaoMike
The reason why I'm looking at reusing a Prius...

The reason why I'm looking at reusing a Prius inverter rather than building one from scratch, apart from it already having the hard work of all the gate drive and critical current path layout already...
Forum: Appliances & Gadgets 12-21-19, 10:03 AM
Replies: 6
Views: 334
Posted By NiHaoMike
ESP8266 temperature sensor modules sending...

ESP8266 temperature sensor modules sending measurements to a Raspberry Pi.
Forum: Solar Power 12-21-19, 12:03 AM
Replies: 15
Views: 617
Posted By NiHaoMike
Basically, the inverter plugs into the existing...

Basically, the inverter plugs into the existing breaker box via a 240V outlet with a dedicated breaker. It then powers loads on that breaker box but not backfeed the grid, which is done using sensors...
Forum: Solar Power 12-20-19, 07:16 PM
Replies: 15
Views: 617
Posted By NiHaoMike
I have looked at that one, but unless something...

I have looked at that one, but unless something has changed, it can only "zero export" to loads on the output side, not the input. I have also watched a review on it and the owner criticizes that the...
Forum: Solar Power 12-07-19, 08:30 PM
Replies: 15
Views: 617
Posted By NiHaoMike
The nice part about not exporting to the grid is...

The nice part about not exporting to the grid is that it avoids the problems with exporting to the grid. In practice, the chances of a grid tie inverter powered from a varying source like solar...
Forum: Solar Heating 12-07-19, 02:28 PM
Replies: 1
Views: 145
Posted By NiHaoMike
This is a DIY site. Learn how to build it...

This is a DIY site. Learn how to build it yourself - it will be cheaper and you will learn a lot.
Forum: Solar Power 12-04-19, 10:23 PM
Replies: 15
Views: 617
Posted By NiHaoMike
No, the inverter works by sourcing a current to...

No, the inverter works by sourcing a current to offset the load current, more like "blending" than "switching". For example, if the load is drawing 10A, the inverter will supply 10A to offset it. (In...
Forum: Solar Power 12-03-19, 11:39 PM
Replies: 15
Views: 617
Posted By NiHaoMike
PV inverter from Prius inverter

I'm looking to build a bigger solar power system, with thermal storage. Since going full grid tie is a bit involved, I'm planning to make it "zero export" with limited battery storage instead....
Forum: Tools 11-27-19, 07:59 PM
Replies: 6
Views: 1,082
Posted By NiHaoMike
Dave Jones of EEVblog just reviewed a cheap bench...

Dave Jones of EEVblog just reviewed a cheap bench PSU.
https://www.youtube.com/watch?v=0qjLx_HsKUQ
Forum: Solar Heating 11-20-19, 08:48 AM
Replies: 9
Views: 441
Posted By NiHaoMike
If it's city water, it will have chlorine added...

If it's city water, it will have chlorine added specifically to prevent that problem.
Forum: Renovations & New Construction 11-18-19, 08:57 AM
Replies: 1
Views: 144
Posted By NiHaoMike
DIY one out of a window A/C and coax coil heat...

DIY one out of a window A/C and coax coil heat exchanger.
Forum: Solar Power 10-30-19, 11:42 PM
Replies: 72
Views: 49,442
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: 695
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: 39
Views: 3,039
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: 39
Views: 3,039
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: 442
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: 39
Views: 3,039
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...
Showing results 1 to 25 of 500

 
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