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Search: Posts Made By: NiHaoMike
Forum: Appliances & Gadgets 08-10-20, 10:19 PM
Replies: 8
Views: 1,018
Posted By NiHaoMike
Definitely time for a better soldering iron....

Definitely time for a better soldering iron. Something like the TS-100 will handle 12AWG wires with ease. It uses integrated heater cartridges with better coupling than the older irons that merely...
Forum: Geothermal & Heat Pumps 06-24-20, 09:49 AM
Replies: 18
Views: 2,312
Posted By NiHaoMike
Go with good quality (e.g. Kester) 63/37 leaded...

Go with good quality (e.g. Kester) 63/37 leaded solder. Lead free is harder to work with so I do not recommend it for a beginner. For the iron, go for the TS100 if you want one that's portable or a...
Forum: Geothermal & Heat Pumps 06-01-20, 12:02 AM
Replies: 4
Views: 1,194
Posted By NiHaoMike
Interesting new take on a window A/C

https://www.youtube.com/watch?v=f2NmgOvIv2M
About the only features that seem to be missing are heat pump operation and infrared tracking to automatically direct airflow where needed.
Forum: Solar Power 04-20-20, 09:54 AM
Replies: 24
Views: 5,550
Posted By NiHaoMike
I got a lot more parts for the inverter (the...

I got a lot more parts for the inverter (the inverter module itself, capacitor bank, inductor cores, various control circuit parts) and I'm working on it. It will be a long project for sure, one with...
Forum: Appliances & Gadgets 01-25-20, 11:29 PM
Replies: 3
Views: 1,412
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: Appliances & Gadgets 12-27-19, 06:41 PM
Replies: 6
Views: 3,593
Posted By NiHaoMike
You can manually turn down the backlight...

You can manually turn down the backlight brightness.
Forum: Solar Power 12-04-19, 10:23 PM
Replies: 24
Views: 5,550
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: 24
Views: 5,550
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: 3,612
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: Appliances & Gadgets 08-24-19, 02:33 PM
Replies: 39
Views: 7,755
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: 7,755
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: 1,240
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: 7,755
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: 39
Views: 7,755
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, 01:03 AM
Replies: 39
Views: 7,755
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: Appliances & Gadgets 04-18-19, 06:51 PM
Replies: 5
Views: 2,340
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: The Billiards Room 02-04-19, 10:31 PM
Replies: 7
Views: 2,771
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 01-02-19, 07:01 PM
Replies: 6
Views: 1,941
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: Solar Power 12-13-18, 12:03 AM
Replies: 51
Views: 20,587
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: Conservation 08-06-18, 07:08 PM
Replies: 189
Views: 35,701
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: Geothermal & Heat Pumps 06-30-18, 12:48 AM
Replies: 13
Views: 3,054
Posted By NiHaoMike
A lot of computer fans are rated for surprisingly...

A lot of computer fans are rated for surprisingly high temperatures, because it can get that hot on the exhaust side of a heatsink. But maybe you could add the fans on the inlet side?

I suggest...
Forum: Other Improvements 03-25-18, 02:29 AM
Replies: 4
Views: 1,933
Posted By NiHaoMike
I have put together a 12.8V, 82Ah LiFePO4 pack...

I have put together a 12.8V, 82Ah LiFePO4 pack (4S15P 32650s) as a drop in replacement for a common 12V lead acid and am currently working on a 16.4V, 65Ah LiMn (2x Nissan Leaf modules) smart battery...
Forum: The Billiards Room 02-03-18, 01:53 PM
Replies: 25
Views: 6,491
Posted By NiHaoMike
Found this interesting article about Bitcoin...

Found this interesting article about Bitcoin mining:
http://cseweb.ucsd.edu/~mbtaylor/papers/Taylor_Bitcoin_IEEE_Computer_2017.pdf
Many of the basic concepts also apply to altcoin mining, except...
Forum: The Billiards Room 02-01-18, 10:44 AM
Replies: 7
Views: 2,771
Posted By NiHaoMike
Search for Ethernet connected outdoor cameras....

Search for Ethernet connected outdoor cameras. Most of those will support PoE as well. Then use a Raspberry Pi as your own server.
Forum: The Billiards Room 01-31-18, 11:55 PM
Replies: 7
Views: 2,771
Posted By NiHaoMike
There are plenty of outdoor IP cameras available....

There are plenty of outdoor IP cameras available. Just run a long wire to power it.
Showing results 1 to 25 of 231

 
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