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The reverse RU is a UL recognized component, but is not UL listed as complete product would be.<p>My employer from a few years ago has a really good list of marks on their website. Its doesn't all of them, but most of the ones you see in the US. http://www.watlow.com/literature/prodtechinfo/files/co...

Make sure you star ground at the supply and it should work just fine.<p>Ron

Digital IO cards can be useful. However if you are running solenoids or motors, the switching of the inductive loads can cause real headaches with the controller cards which are designed for resistive or lamp loads. It probably will be ok as long as the solenoids and or motors are small.<p>Learning ...

Chris Electronics is typically a 30-40% less than Digikey, and the do not have a minimum order. In volume, they tend to be about 10% less than the big OEM suppliers. In many cases, they will split reels as well. They do not have a web catalog or e-commerce, as their customer based is probably 99% OE...

Here is the midi protocol. http://www.hinton.demon.co.uk/midi/midicode.html <p>If you can set the micro's baud rate to to the right setting, capturing the data becomes quite reasonable. If you have to bit bang midi, it can be a challenge. The good thing is that you are only interested in recieving t...

You could make a midi slave with a pic or avr. Then look for a specific key to correlate with a given cylinder or light. You could use the key velocity data for positioning. I think thats what some places used for show control before DMX-512 took over. <p>Ron

If the volumes of the cars sold were high enough, this is another possibility. http://www.maxwell.com/ultracapacitors/products/PC5-5.html <p>1.8F at 5V in a very small package. They are really spendy unless you need to buy a million or so.<p>Certainly not anywhere near the energy density of a AA bat...

$10-$15 each sounds way to high. A 5A mosfet with decent Rds is typically under $0.50.<p>What part number mosfet is he using. If he is using a P-channel, it will not work, unless you use a gate driver. Take a look at www.ti.com and International Rectifier for application circuits. Especially note th...

Check out http://www.discovercircuits.com/M/motor-cont.htm <p>There is nothing wrong with phase angle control of a motor, other than it makes a whole ton of electrical noise and interference, provided you set the control up properly, and ideally will provide some feedback to the control system. <p>T...

Most likely they are not working as you built them on a breadboard instead of a pcb. I've built a number of projects with Lynx parts. Never had any problem, but every single one was on a pcb.<p>If you look in the Lynx app notes they say "During prototyping, the module should be soldered to a pr...

Most likely they use 7V in order to save some headaches and deal with the cameras internal charger and switcher circuit. At 5V, the duty cycle may get so high as to overheat the core or other disastrous effects. <p>I cannot stress a 7.5V or smaller crowbar enough.<p>I've never had success with a 780...

6VDC is probably a little too low for the camera's lcd switcher. It will be working very hard, and could go into shutdown, or worse be damaged.<p>As far as a computer supply, it really depends on how they handle the feedback. It the supply was not optimized for a heavy load on 5 and lighr on the 12,...

Make sure you put a crowbar on the output....<p>The easiest way would be to use Nationals simple switchers and webbench. 2A at 7VDC with a linear regulator will require a huge heat sink unless you can find just the right transformer. The other possibility is to use 3-4 2N3055's as series pass transi...

As far as your original question, damage is unlikely. Just be sure you do not have any coupling from the 3886's power supply to the dc power supply you are using om the speaker.<p>One pointer, make sure everything is battery powered or isolated with a transformer(with the exception of the computer)....

Most nichrome wire heaters can be assumed to be resistive, with a very small temp co unles of course you run then beyond 700 deg F, where in the resistance temp co changes fairly dramatically. If you continue to go on up in temperature then the curve dramatically again changes yet again. Take a look...