T&L Publications

The motor puts out HUGE voltage spikes when the comutator slides from one contact to the other. The most obvious cause of problems associated with these spikes is the tendency to damage other circuits attached to the same supply. As you noted, connecting this to a seperate power supply is absolutely...

Do you have access to a Spectrum Analyzer?

That site is loaded with useless crap.

IRF9z30
Digikey: IRF9Z30-ND<p>HEXFET(P) -50V -18A TO-220<p>--------------------------<p>IRFr9020
Digikey: IRFR9020-ND<p>HEXFET (P) -50V -9.9A D-PAK (TO-252AA)

The number of devices required is mainly determined by the device junction temperature (Tj) limitations. For a given device current, a maximum Tj is specified (usually between 120 and 180dC). The Tj is above the ambient temperature by a temperature<p>Tja(max) = Rja * Pdiss, where Pdiss = I(max)*I(ma...

I'm currently doing r&d using DSSS, and conveniently enough just finished a design cycle for a DSSS packet radio. There are several different methods with increasing levels of complexity. Determining the encoding scheme can be done to some extent with a spectrum analyzer a close range, but you s...

How fast do you need the output to slew? Is this for a laser-show or some other application?<p>The uni-polar emitter follower works great for single-ended applications. cktA <p>Do you need to both sink and source current? If so, a double-ended emitter-follower is a better solution.<p>You can constru...

You can produce HV with an ignition coil when driven as designed for, but that's not all :) . Ignition coils can be made to put out a great deal more power (more voltage and potentially more current) when pumped with a large capacitor discharge. To go even further, you can use two capacitor discharg...

Three years ago, I started out an asembly PIC user. I re-created many of the basic starter programs from simple counters that drive 7-segment displays to dtmf modulation and so forth. I built simple interface protocols utilizing sci, spi, and parallel interfaces, constructed sensor sampling and disp...

Look at this resource under the "Radioactive" section:<p>http://www.kronjaeger.com/hv/<p>or Research "Geiger Counter" on google...

I have done some Audio Amplifier design, but I am not at all familiar with Aiwa's topology. Do you have a schematic that can be posted or e-mailed?<p>[email protected]

The approach using the 4510 and 4511 is about as easy as it gets. The URL in my first post shows the cascading of the two 4510s about half-way down and the connection of the 4510s to the 4511s at the bottom of the page. Here's the URL again (just in case):<p> 4510 and 4511 usage <p>Digi-key (www.dig...

BTW if you dont have access to the development tools necessary to solve the problem with PLD or a microcontroller, it's easy to get started!<p>Lattice Semiconductor (http://www.laticesemi.com) offers free development software and an Engineering Development Kit runs about $100 on: http://www.arrow.co...

The newest reelase of IEEE 802.15.4 utilizes differential encoding in the physical layer of the 915MHz band.<p>The input bit stream is converted to symbols, or in this case broken into nibbles. Next, the 4-bit symbols are replaced by a 32-bit word, providing a digital gain of 8 (or 18dB I believe). ...