Latest threads in Hobby Electronics Basicsshow only best voted threads
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Max Rise/Fall time question CMOS inputs
Question about long rise and fall times for the Set/Reset/Data input lines to the CD4013 dual D flip flop. The data sheet doesn't list maximum times for changes on the set/reset/ data lines for 4013....
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14 years ago
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New Book about Radio and Electronics
SolderSmoke -- A Global Adventure in Radio Electronics From Crystal Radios to Podcast MP3s With Occasional Forays into Astronomy, Kite Aerial Photography, and Model Rocketry SolderSmoke is the story...
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14 years ago
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Using my laptop as a cheap oscilloscope using Visual Analyzer 2009 tia sal2
Greets All I plan on Using my laptop as a cheap oscilloscope using Visual Analyzer 2009 does anyone know the amount of current that the mic in port of a laptop can handle (don't want to blow the mic...
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14 years ago
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Frequency of A Common Circuit
L1q1''(t) + L3q1'(t) + L3R2[q1'(t) - q2'(t)] + q1(t)/C1 + (q1(t)-q2 (t))/C2 = En sin (omega t) L2q2''(t) + L3R2 (q2'(t) - q1'(t)) + [q2(t) - q1(t)]/C2 = Em sin ( omega t + phi) R= resistance L =...
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14 years ago
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Why when we touch osciloscope probe it shows 50Hz noise?
Hello, I have asked this question from different people but never got a satisfactory answer. I want to know in terms of electromagnetic physics how 50 Hz frequency of main is induced in our body and...
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14 years ago
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film capacitor life test
Hi everybody, I am curious about how to test film capacitor's life. What are the main parameters that effect a film capacitor's life? Also, are there any circuit designs that you can recommend me to...
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14 years ago
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Radio: Absolute Basics
Howdy folks. I've been really interested in building a simple AM radio for a long time, but I've always wanted to understand it rather than just put together something that somebody else designed. I'm...
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14 years ago
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Is there such a thing as CFDVRAM?
Hi: Is there such a thing as Capacitor-Free Dynamic Volatile Random Access Memory? Thanks
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14 years ago
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Old 5v TTL: What does a NAND gate looped back on itself do at the analog level?
I no longer have access to a scope; I've been wondering about this off and on. Back in college I pondered a NAND gate with one input held high, and the other input being tied to the output. Basically...
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14 years ago
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Very OT: My Vintage Dream PC
Hi: My vintage dream PC contains the most advanced motherboard [in terms of ability to handle the highest processor speed of it's type as well as maximum RAM capability] that contains the most amount...
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14 years ago
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Elementary AC circuit analysis
I'm trying to calculate a voltage in a circuit, and having the problem that I can't quite remember simple circuit theory. I have a circuit that boils down to something like this: +-C-R1--+--R2--+ | |...
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14 years ago
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TRIAC gate control problem
Hello All We have a problem with the a TRIAC device we are using. We are using it to switch 230V AC mains on and Off. The gate is connected directly to the output of our Attiny processor. The whole...
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14 years ago
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microprocessor 8086 HELP
hello guys.. i want a program which find the prime numbers from 1 to N (N is given from keyboard) and result shown in the monitor.. please help me..
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14 years ago
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Getting into CPLD
Hiya folks. I've been really interested in PLD/CPLD technology ever since I learned that I could replace tons of logic chips for address decoding and such with a single chip. I still have no...
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14 years ago
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Can I use any 12V adaptor for a keyboard?
I bouth an electronic keyboard that requires a 12V 1.5 A AC adaptor but did not come with one. I have a 12V 1300 mA adaptor lying around the house. Can I use that ? I hope I won't destroy anything if...
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14 years ago
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