T&L Publications

Unless you want to build or buy a synchronizer (you don't), the two cameras will need to be sync'ed horizontally and vertically before you display them on a split screen. That means that both need to be locked to or driven by a common reference signal, or one has to be locked to the other. If you ca...

Dean, it's kinda late here. I should be going to bed now, so my thinking may be even fuzzier than usual. Could you explain how the nite lite scheme works? It seems to me that when both 60w bulbs are good, the nite lite has a little more than half the line voltage across it, and glows dimly (maybe). ...

At the risk of being called a nitpicker...<p>Trinary (ternary seems to be the preferred term) numbers are base 3 numbers, not base four. Or did you mean that with 2 wires, you can potentially have a base four number?<p>A Google search for "ternary arithmetic" and "trinary arithmetic&q...

Billdar, you got these backwards:<p>"They are also amplifying different quantities. common collector amplifies voltage whereas common emitter amplifies current."<p>Common collector is an emitter follower, and has current gain, but the voltage gain is slightly less than one. Common emitter ...

Two more cents...<p>Some of these ideas are good. I especially like Al's current transformer and Miguel's light pipe.<p>Regardless of what sort of failure sensor he uses, it seems to me that heater reliability is a problem. I would much rather change a light bulb under a house at my leisure, in the ...

I have a few alternatives.<p>1. Put two 60 watt bulbs in series. The combination will probably dissipate about 40 watts, and they will last a LONG time.<p>2. Use a 60 watt bulb with a series diode like a 1N4004. This will also dissipate about 40 watts, and will last a long time.<p>3. Buy a 100 watt ...

A Google search led me to a patent. Go to http://www.uspto.gov and search for patent number 4099118. If you can't see images, click on "help" and follow the instructions to install a free image viewer. If you have some electronics savvy, you may be able to build one from the description an...

Rogerio, can you post a URL to a schematic? I found one for IT-1121, and it has those same transistors in it. We might be able to suggest a substitute if you can show a schematic.<p>Ron

Bodgy, mayhaps you have a leaky heart valve? The stress of worrying about this condition could have implanted the term in your mind. <p>Ron

Voltage doublers are rectifiers. The output is a DC voltage. I've never seen one used on RF. It takes several volts of AC for a voltage doubler to be effective, because two diode drops (about 1.4v, in the case of silicon) are lost in the doubling process. So, if your input is a waveform that is 10 v...

Check out this site:
http://www.fnrf.science.cmu.ac.th/theor ... %2011.html<p>Ron

Dean, if you plan on traveling to Europe you'll want to have a wide-range genlock installed so that you can lock to 50 Hz, as well as 59.94 Hz.<p>Ron

Well, the momentary short only lasts for the sum of the propagation delays of the two inverters, and then the output assumes the state of the switch. I can't think of a logic family where this would be a problem.<p>Ron

Dean, I just now clicked on the URL I posted. Works for me.<p>Ron

Al:
Why would you need pullup resistors, unless you were using open drain (or collector) inverters?<p>Ron