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Search: Posts Made By: NiHaoMike
Forum: Solar Power 05-16-21, 07:30 PM
Replies: 26
Views: 46,196
Posted By NiHaoMike
Mostly completed the wireless sensor, what's left...

Mostly completed the wireless sensor, what's left is to validate that all of the features work properly and then conformal coat for installing into an outdoor breaker box.
Forum: Solar Power 03-14-21, 10:10 PM
Replies: 26
Views: 46,196
Posted By NiHaoMike
Pretty big Pi Day update. I connected a pair of...

Pretty big Pi Day update. I connected a pair of AK5558 ADCs to the FPGA and managed to program the FPGA to work with them. I then used a Raspberry Pi to send the data stream over Ethernet to my PC so...
Forum: Solar Power 06-21-20, 11:48 PM
Replies: 26
Views: 46,196
Posted By NiHaoMike
Working on the wireless sensor - managed to get...

Working on the wireless sensor - managed to get it outputting a nice, low jitter signal. For a test, I had it transmitting music over the power line and the quality is surprisingly good - not HD but...
Forum: Solar Power 04-20-20, 08:54 AM
Replies: 26
Views: 46,196
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: Solar Power 02-09-20, 11:14 PM
Replies: 26
Views: 46,196
Posted By NiHaoMike
I'm still working on getting the PLC transmitter...

I'm still working on getting the PLC transmitter to work as I want it to. The CD4046 did not really perform that much better than the 74LV4046A since it was getting pushed close to its operating...
Forum: Solar Power 01-03-20, 06:08 PM
Replies: 26
Views: 46,196
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 12-29-19, 11:09 PM
Replies: 26
Views: 46,196
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: Solar Power 12-21-19, 09:35 PM
Replies: 26
Views: 46,196
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: Solar Power 12-20-19, 11:03 PM
Replies: 26
Views: 46,196
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, 06:16 PM
Replies: 26
Views: 46,196
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, 07:30 PM
Replies: 26
Views: 46,196
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 Power 12-04-19, 09:23 PM
Replies: 26
Views: 46,196
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, 10:39 PM
Replies: 26
Views: 46,196
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....
Showing results 1 to 13 of 13

 
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