Latest threads in Hobby Electronics Basicsshow only best voted threads
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Running at half the voltage
Have a 10Watt, 12Volt Hologen lamp for a christmas decoration. But the mains tranformer I have is only 6 Volts. Apart from being a bit dimmer, would there be any other consequences running at the...
47
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11 years ago
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Passive f to 2f converter
I got a request for a f to 2f converter for our lockin. (Freq = 3 - 3k Hz. ) (Well a crappy pic, but I wanted to show that it has a filter module. (It stinks signal wise too, the photographer didn't...
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11 years ago
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14 | |
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CD4017 chip output latching problem
HI all, I've been having problems with a timer circuit I'm building. It uses a chai n of seven CD4017BE decade counters. The first in the chain gets clock puls es from a 555 running at about 10Hz. I...
9
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11 years ago
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9 | |
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LCD tv imput help
My 32" Polaroid LCD (Model 3200) tv has lost most its video imputs. It only works on a cable coaxial imput. No screen problems with this imput, but I don't have cable, only satelite. The HDMI and...
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11 years ago
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Anybody want to bid a circuit design?
I'm working on a project for myself. I need a circuit that will output several 5 volt pulses on one output then stop the pulses and output 5 volts on another output constantly as long as a switch is...
49
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11 years ago
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49 | |
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Starting a PC without a Finger
Hello, Any chance someone here has a easy or slick way to start (turn on) a PC with out the use of a human finger?? I am having an issue with power outages and the UPS can't keep the NVR up long...
10
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11 years ago
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The Price of Aluminum
I'm in California. Not that it may matter. Does anyone know the price of Al per square foot for 1/4" or 1/8" thickness.
9
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11 years ago
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9 | |
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Stainless Steel nuts and bolts for Observatory
I finally discovered someone who can put a control system in my observatory. To get prepared for the big day the work begins, January, I need a fairly large number of nuts. The contractor suggests...
17
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11 years ago
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17 | |
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Ping Jim Thompson (was: single one-shot pulse detector needed)
Hey Jim, I posted the circuit you asked for on abse, but got no reply. Did you miss it?
1
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11 years ago
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1 | |
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Heathkit oscilloscope FIXED !!
Heathkit IO-18 Thanks everyone for the help/advice in fixing the above. Problem was the 1 V2 tube. Saw a deal on E-Bay (5 tubes for $12). Took a chance. They all seemed brand new (with boxes) and all...
9
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11 years ago
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9 | |
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Decoupling capacitor choice for 4017 decade counter
Hi all, I've been having some problems with a chain of divide-by-ten counters firin g off prematurely and messing up the division. I'm guessing this is a decou pling issue (after all, what else could...
14
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11 years ago
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14 | |
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Faraday's Law
-- Reply in group, but if emailing add one more zero, and remove the last word.
7
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11 years ago
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Laptop power supply 20V
The new Lenovo laptop I bought comes with an AC to 20V DC external power converter. Why such a high DC voltage? I would expect that most of the circuitry in there operates on 5V or even 3.3V. While...
3
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11 years ago
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Output voltage at Nmos
Hi, I am using Nmos IRFZ44N and STP36NF06L as a switch, opening and closing a c ircuit with 5 volts power suply, a 82R resistor and two Red Leds in paralle l. But, I can't undestand why when I use it...
2
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11 years ago
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HDMI converter
I am in need of a device that will take the HDMI coming out of my Sat receiver and convert it to composite, S-video, or straight video. . . . I don't suppose such a device is available.
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11 years ago
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