T&L Publications

The DC to AC converters I'm aware are high frequency switching devices. The duty cycle of a square wave is varied in a sinosoidal manner and then filtered through an inductor (usually the winding of an induction motor) to produce the sinosoidal AC wave form. Feedback is used to modify the square wav...

The ones I have used just require a couple of ceramic caps, like .o1 or .oo1 uF. Usually these are included in the clock input circuit of the microprocessor you drive with them. <p>In any event, the required circuitry is fully explained in the data sheet for the oscillator.

I'm pretty sure I saw some fire fly green ones...and I would think you could replace a timing resistor or something to slow 'em down.....<p>Anyway, my real point was idividual circuits might be simplier and with drift and component tolerance variations working for you for a change...would likely giv...

Heres another approach.<p>1. Go to Kmart.<p>2. Find the Automotive section.<p>3. Wander around the Automotive section until you find the lighting accessory section.<p>4. In the accessory section find the "Tire Fly" display. These will be cardboard boxes sort of cut on a diagnal so the fron...

Don't Believe everything you read. Its 5:20 here...I just put the coffee on.<p>[ December 06, 2003: Message edited by: cato ]</p>

No, Current is not current. In an AC application the current falls to zero 100 to 120 time a second. So, as the switch opens the arc that occurs as the switch elements separate is extinguished quickly simply because there is a zero crossing in the voltage. In DC circuits there is no zero crossing. A...

I think its quite clear what he's trying to accomplish. He wants to check the internal connections of an IC as far as he can. Some of the pins are either AC coupled or have bypass caps to ground. He wants to test that they are there or that the connections between the components are there. <p>A sign...

I understood your original post to imply that the output of the 555 circut would be a signal line going from zero to VCC and staying there after some period of time explires.<p>If thats the case, then you can use that output to generate the "ramp" by connecting the output signal to a resis...

Electrolytic Caps are used for "Bulk" capacitance...A lot of MFD in a small space....I don't think you will find an electrolytic cap smalller than 1 MFD. You might find tantalum caps in the range you are looking for. For Timing applications I have had better luck with Mica caps.<p>The worl...

Sounds like you have it, what part are you looking for help with? As I recall, if you ramp up (or down?) the voltage on the gate of the SCR, it will increase the percentage of the AC cycle that the scr is conducting and that will increase the light output of the lamp you are driving with the SCR. I ...

Ummmm...have you considered using a grounding strap or wire?

Zeek
Yes, by pins I mean leads from a component. The term is more accurately applieded to ICs (integrated circuits or "chips") than it is to the leads from resistors or capacitors, but I use it generically to refer to all leads.

Zeek - Like the other guys said, dots mean connection, no dot means the guy who drew the schematic didn't see a way to draw the line from point A to point B without crossing the other lines. There is no electrical significants to the route a wire or line takes in a schematic. In fact, sometimes 4 op...

Sometimes schematics in magazines are general in nature and do not contain enough information, by themselves, to acutally build the circuit. Instead they show the general ideas of a circuit...and amplifier here, a filter goes there, some feedback between these two points. I'm guessing that you are r...

I have no idea how much force you will get from it....probably NOT 5lbs.....however....consider opening a Crest Spinbrush. Inside you will find a DC motor and a simple gearing arrangement to turn the rotation of the motor into a linear reciprication of about 1/4 inch...I think if you use a different...