Category Archives: Uncategorized

Zero Vampire Drain SLA Battery Charge Controller

12 volt sealed lead acid batteries are very useful for many applications, but many charge controllers put a small drain on the battery. Once this drain has emptied the battery, it will be ruined if not immediately recharged. But with … Continue reading

Posted in Uncategorized | Leave a comment

SUN-2500P Power Inverter Remote Control

In searching for inverters that could run a 3000 – 4000 watt load in an off-grid solar system, I found some low cost inverters on eBay (SUN-2500P is the model I see on these). An issue soon came up after … Continue reading

Posted in Uncategorized | Leave a comment

Repair Yihua PS-3010D Power Supply Stuck at 50 Volts

I have a Yihua PS-3010D 30V 10A power supply and one day it would only output 50V. After doing some measuring with my volt meter it looked like the top supply rail was shorted to the output. I could see … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment

Build a Cheap 24V 20A Battery Charger

I have a 24 volt battery bank I use to run an off grid well pump. On cloudy days, sometimes I want to run the well to test out sprinklers, etc. So I wanted a battery charger that could put … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment

Cheap Trick to Remove a Frozen Ferrule

Replacing a leaking cutoff valve for a toilet or faucet is pretty simple, expect for when the old ferrule/compression ring get stuck on the water pipe. This happened to me the other day, and I did not have a puller … Continue reading

Posted in Uncategorized | Tagged , , , , | Leave a comment

Running a Digi TransPort WR11 XT on USB, 12V and 24V power

Update 2 Digi has a new product to address this need. Digi PN: 76000976 I have it running in the field for about a month with any issue. —- Update This setup worked great while running in my workshop, but … Continue reading

Posted in Uncategorized | Leave a comment

Script to Limit Number of Files in a Directory

I have some jobs that run and will fill up disk drives if not pruned. I put together the simple script below that I can call with a directory and the number of files I want to keep. The oldest … Continue reading

Posted in Uncategorized | Leave a comment

Lessons Running IP Security Cameras Off Grid

On a small off grid hobby ranch, running IP cameras to keep an eye on things proved a bit trickier then planned. Durning the summer the solar panels produce enough power to run a well, a data logger, a camera … Continue reading

Posted in Uncategorized | Leave a comment