T&L Publications

Do they still put big diodes between the main battery and the auxillary battery. A properly connected diode will prevent one battery from becoming a load if the other one should become too weak to fully charge or if a cell shorts out and the voltage drops.<p>In such a configuration, the Aux battery ...

Since the inputs take very little current, you can do the whole thing with a voltage divider.<p>One or two fixed resistors and a potentiometer should do the trick.<p>Place the resistors and pot in series between the source (10V) and ground with the pot in the middle and the wiper connected to the in...

I gather proximity sensor is IR and the communication link to the base is RF.<p>You can try to improve the efficiency of the transmitter and/or reciever by modifying the antenna it uses. Try to find the antenna node on the PCB (it may be nothing more than a PCB trace or wire stub) and extend it with...

I have no clue, the logo on the RS website is unclear and I have no sample. Besides, the logo was unfamiliar anyway. Is there a country of origin marking on the device. <p>By offshore I meant any one of a number of OEM manufacturers in China, Taiwan, Hong kong, Malasia or Phillipines etc (S E Asia)....

Horizontal Trim pot. probably 6mm size, Open Frame, Carbon comp.<p>Looks like<p> www.Bourns.com model 3319<p>Alps Model RH01(www.potentiometer.com bottom left link to trimmers) Alps website hard to navigate<p>Panasonic (didn't look it up but they are a primary OEM) <p>Also take a look at Ohmmite, Cl...

Ideally, the clamp on meter probe will not measure any DC component. If you do get anything off your alternator, it is just ripple current or the big surge you get when you turn on or off current.<p>66% factor is that proportion of the answers that will make sense ;) (Sorry, just kidding. I couldn't...

I don't think that NEC has anything to say about structural protection from lightning except to how it pertains to protecting the active electrical distribution system like the breaker box and service connections.<p>In general, only the local building code would require lightning protection and prob...

It seems both definitions are correct. We may all have to increase our intellectual bandwidth to accept alternate definitions as the technology progresses further. That's how the english language works (among others). In fact websters (www.m-w.com) lists both definitions while britannica only lists ...

Excese my ignorance, but why is it called a "Jungle" IC. Does it have a more technical sounding name I might see in a listing of parts?

Given that you'll be using the shelter during a storm when lightning is likely, grounding the pipe to a ground spike is worthwhile even if it is not absolutely necessary. <p>Assuming the stove is bolted to the pad and the cement is in intimate contact with the earth, it could provide an adequate gro...

"Unfortunately when the vehicle is stood still and you accelerate the speedometer registers a value. I have no idea what this means,"<p>I interpret this to mean that the display registering a speed when the vehicle is in neutral but you are reving the engine.<p>I might guess that you have ...

Sounds like your a couple months early for an April Fools joke. I always enjoyed that article in the now defunct Radio Electronics in the April edition (for a few years anyway). My favorite was the Macrowave oven which purported to make food colder by emitting longer microwaves. Apparently some read...

There is another although less efficient way to regulate the output. That is to let the RPM of the generator vary and feed the AC output into a rectifier then back into an inverter (AC-DC-AC converter). This basic scheme is used by wind turbines. If you get a good inverter (off the shelf) then the v...

I don't know about Ivex but generally speaking PCB CAD files are not portable. Unless the program that made the BRD file has a DXF export command, you probably won't find one from a third party.<p>When it comes to PCB layout. It appears that only the netlist files are easily importable. Libraries, p...

I assume that your generator must maintain input revs at 1800RPM so that the output will be 60Hz. A change in speed means a shift in output frequency (depending on the load this may be tolerable within a narrow range).<p>When the load increases, the torque required to spin the generator increases an...