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A servo moves based on the width of the pulses, which come in a steady stream. 1mS to 2mS every 20mS if memory serves. 1.5mS for servo center.<p>I don't know Stamp code so can't help anymore.<p>Cheers,

repeat: Are the pulses 5V-open-5V-open, or 5V-ground-5V-ground? added: or bipolar pulses (AC)?<p>(the values can be calculated/experimented later, not needed for the concept)<p>If bipolar pulses, it works. But driving two LEDs defeats the power saving.<p>If 5V-open pulses, it don't work. No current ...

dburlesn,<p>In second post: "My worry, is that a 45 amp alternator will OVER CHARGE the batteries in the beginning."<p>It won't over-charge if the alternator is voltage regulated to around 27.5V - 28V and you use a resistor to limit the charge current (or a transistor charge regulator circ...

Is the project an analog circuit, or a microprocessor? You've got analog suggestions (I favor op amp approach). In a uP use a look-up table and interpulate for the in-between values.<p>Cheers,

Are the pulses 5V-open-5V-open, or 5V-ground-5V-ground?<p>In first case, the cap charges like cato said.<p>In other case, it charges during 5V. During ground half of cycle it would discharge thru driver except that LED is reverse biased. After a few cycles the LED would probably see about +1V and -4...

I think I figured it out.<p>8HP gas engine with electric starter drives mower blade and alternator.<p>The two 24V electric motors drive the wheels. One motor for each side for tracked style steering.<p>The batteries power the wheels while moving from the garage to the lawn because the gas engine is ...

Very big question! Go to the library and find a copy of Asimov on Physics by Isaac Asimov, or one of his other non-fiction books on physics or chemistry. Before being a science fiction writer, he was a chemistry PhD, and his expanations can be understood by just about anybody over 12. Very little ma...

Thanx RonH. That's why I put the "(if I remembered that right ... )" in there. Its been many years since I've had to calculate to convert between linear gain, power dB and volts dB. At work its strictly dBm box-to-box; bridged (high Z) mode for working channels, term mode with correct impe...

Some LEDs can emit more light than some laser diodes. The significant feature of laser light is that all photons are in phase.

dB is a logrithmic ratio. The ratio of input to output is gain (ot loss). Signal to noise ratio. Etc.<p>Absolute measurements have a qualifier. Like dBm which stands for decibelmilliWatt. 0 dBm = 1mW. A signal of 0.5mW is -3dBm; and 6dB (no "m") weaker relative to a 2mW signal.<p>Op amps c...

Yes, but not usually. hfe is current gain of just the transistor. Often dB is used to reference the gain of a circuit, the transistor, it's associated resistors capacitors inductors, and the impedance of the load.<p>A transistor with a minimum hfe of 100 may have an actual hfe between 100 and 300. A...

I have a Fluke 187 which has True RMS built in. In AC volts mode, most meters measure average as you say; but they display the RMS value. As long as you're measuring sine waves all is well, and the peak voltage is 1.414 times RMS. (or if they have a filter after the rectifier, they measure peak and ...

The T6963c spec sheet (1.25MB) says pin 2 is RESET. +4.82V is about right for a pin with internal pullup. Maybe the controller manufacturer meant pin 2 of the board the IC is mounted on????<p>Later -<p>[ July 01, 2004: Message edited by: Dale Y ]</p>

Tommy volts,<p>Short answer to "I think you must have put the drawing on a website and then posted it as a URL with a UBB code?" is yes. Images are not uploaded to Nuts & Volts' server when you click "Add Reply".<p>Edd,<p>For images (.gif, .jpg, .png, etc) try putting mouse c...

A Darlington connection is two transistors. Often a power transistor (A) with a small hfe (gain) connected to a smaller transistor (B) that has a higher hfe.<p>The connection is collecters A and B connected together, emitter B to base A, base B for input, and emitter A.<p>The gain of the connected t...