Lydian's FastMHz

Autie retro tech geek!


Mobile Solar: Pickup Mounted 300w Off-Grid System

I’ve been putting some form of solar on my truck for many years now.  It started with a 25w module on my 1997 Tacoma, which expanded to 150w.  Then that truck broke and I had this shiny new 2015 Tacoma with no solar.  It felt incomplete.  The first iteration was a full-size SolarWorld 285w 60 […]

Home Made R/C Tank

I’ve always thought tanks were cool, ever since I studied WWII in middle school. I then wanted to have a remote control tank that was quite large. The only solution to this problem was to build one. I did hours of research on the ‘net, looking for others who have large R/C tanks. I came […]

Solar Assisted Battery Backup System

This DIY system consists of a Schneider XW6848 inverter, Schneider 60-150 charge controller, 12 AGM batteries, and 3 SolarWorld 310XL modules on a mobile frame.  This permits me to aim it at the sun during the winter and get more power during an outage. The battery bank’s specification is 48v @ 300aH (14.4kWh), and consists […]

DeMuDa / DMD Chinese Lithium 12v 100aH Battery

Knowing that most lithium batteries sold from China have extremely inflated capacity numbers, and knowing it’s usually around 2-3 times as high as the real capacity, I decided to take a calculated risk and order a lithium pack direct from China via  This particular unit started to appear on Alibaba not too long ago, […]

Solar Suitcase (New Lithium Version)

It’s finally done, my big ‘ol suitcase full of lithium batteries, inverter, and charge controller. The specifications are: -100w PV array -0.75kWh lithium battery storage -300w pure sine inverter -Volt meter showing 3 decimal places (28 = full, 20 = dead) -SunSaver MPPT charge controller -Internal circuit breaker and power switch Let’s take a closer […]

Solar Powered Security Camera & Driveway Light

This solar powered security camera consists of a WiFi HD security camera with a DC-DC converter to ensure constant 12vdc, 110aH GEL battery, 80w SolarWorld solar panel, Morningstar Sunsaver MPPT charge controller, and LED motion sensing floodlight. First I started by testing the system on the ground, to make sure it was reliable. I found […]

100w Portable Power Pack

I recycled the panels from my old truck into this folding, portable AC power source, complete with batteries, capacity meter, charge controller and inverter. Unfolded Folded, with carrying handle Battery capacity monitor The back of the unit isn’t the prettiest, but it’s function over form here. You can see the four 6v 7aH AGM batteries […]

Mega External Laptop Battery Pack

My Toshiba S75D is an awesome machine, but the rather lacking battery life needs to be addressed, and this is an area where I excel 🙂 Recycled lithium batteries and a $6 DC-DC Boost convertor should provide plenty of power for my laptop. Specification: Battery pack – 14.4v, 10.8ah (24 Li-Ion cells, 16.8v nominal voltage) […]

Charging, Discharging and other battery care (FAQ)

Section Codes: NIMH – Q&A applies to NIMH & NICD Batteries LIPO – Q&A applies to Lithium Polymer batteries NIMHLIPO – Q&A applies to both chemistries NIMH – Q. Which is better, NiMH or NiCD? A. The power-to-weight ratio of NiMH is better than that of NiCD. Additionally, NiMH cells are available with greater capacity […]

How I charge a 1400v Cap Bank from a 12v Battery

I’ve gotten a few requests from people asking how I charge such a massive cap bank on 12v…well, here’s a schematic of my whole setup: Here are datasheets for the SCRs (SKKH) and clamping diode (SKKD): SKKH (SCR) SKKD (Diode)