A Short Guide to Vintage Traynor Amps | Lrd12 Overload Relay

Pools have come a long way. It used to be you had a pump and if you were lucky it had a mechanical timer switch on it. That was it. Now you have digital controllers and spa jets and heaters. You can even get them that connect to your home automation system. If your pool isn’t new enough to do that already, you can get a range of add-on accessories. For a price. [Rob] paid $500 to get a remote for his pool. It wasn’t even WiFi, just a simple RF remote. In 3 years, the transmitter had burned out ($300 to replace) and he decided he had enough. For $20, [Rob] added MQTT control and monitoring to his pool using an ESP8266. You can see the video description of the project below.

Interesting idea. You don’t need a 3D printer for this though. Conductive strips or simple wire should work fine.

Actual 220V is present elsewhere, and is a convenient global average of 240V (UK,) 240/208V (NA), 230V (EU), 200V (Japan, though like NA it’s spit to 100V at normal receptacles). So if a manufacturer designs for 220V +/- 10%, it’s probably usable worldwide.

Jerry is Mobile Nation’s resident nerd and proud of it. There’s nothing he can’t take apart, but many things he can’t reassemble. You’ll find him across the Mobile Nations network and you can hit him up on Twitter if you want to say hey.

Upgrade the triac and redesign the PCB to be able to safely take a whole 2400W (Australian 240v 10A mains rating) of mains load.

The potentially game-changing performance of the Sony A33′s EVF overshadows its excellent rear-panel LCD, which is a little unfair: It’s as good an LCD as is found on any other camera, and in at least one sense literally outshines them all. It’s the same widescreen ~920K-dot high-resolution LCD we’ve seen now on a wide range of cameras from a variety of makers, but its implementation on the Sony A33 adds a couple of useful twists. First, of course, it literally twists and rotates, albeit from the bottom of the body, rather than the side. This unfortunately makes it useless for composing self-portraits with the camera mounted on a tripod, but otherwise is quite helpful for getting over-the-head and ground-level shots with ease.

Steady in the dark. The Sony A33′s Handheld Twilight (HHT) mode uses multiple shots and micro-alignment to permit handheld exposures even in very dark conditions. This was a very dark bar scene, but the shot came out sharp enough for a 5×7 print. It could have used some exposure adjust and (definitely) a different white balance setting. Exposure is auto-only in HHT mode, but the similar multi-frame NR mode gives full control.

I’ve left perhaps the most salient characteristic of the Sony AF55 and A33′s EVF till last: It’s huge. The view through the Sony A33′s eyepiece is much more akin to that of a full-frame DSLR than that of any competing sub-frame model currently on the market. It manages this with a comfortably high eye point (and plenty of dioptric adjustment) for eyeglass wearers, at least when simply viewing the live viewfinder image itself.

Meanwhile in my house (uk) we have a street lamp time switch with a single pole switch that looks like it was designed to handle 30A. It is beautifully engineered from brass that increases the on period as the days get shorter, I felt bad hacking it so that it would turn on my water heater for an hour twice a day, a job it has been doing for 17 years now without incident. Electromechanical is by far the best way for high current loads at any voltage as fatcas I’m concerned.

Add in the approx. 75 cents of AC shore power I pump in every night, and it works out in my head to about 5 cents per mile. Takes a lot of words and numbers to explain that figure, but the practical impact is that every day I drove over two hours, the car bought me lunch. I feel like I’ve patched a hole in my money pocket. This is half the running cost of any other car I’ve owned, including the TDI.

I’m certainly pleased the US Air Force along with the wind turbine industry taught me just a few skill sets in getting that Level 2 service expeditiously installed.

You did reply to the Gurubuckaroo comment, just a few interjections managed to find their way in first. Does mess up smartarsed replies occasionally, shame when it’s a particularly funny one. On busy articles, I often find posts popping up between pressing “reply” and “post comment”.