Latest threads in Hobby Electronics Basicsshow only best voted threads
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Numbers Behind Bird Friendly Solar Thermal
Googlemap "Ivanpah" to see tens of thousands of tracking mirrors in a 2 km dia farm. Use these ballpark numbers: mirror dimensions: 3 m X 3 m ave. distance of mirrors from receiver: 600 m angular...
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10 years ago
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Boost DC-DC converter online simulation
Online simulation of Boost converter DC-DC converter is ready. Boost DC-DC converter has output voltage always higher then the input. This makes it particularly useful in battery systems as well as...
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10 years ago
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OT: Microsoft Lync
A new client uses Microsoft Lync for Instant Messaging. At my office I use Skype. I understand there's a way to set up a link ;-) between the two, but I can't figure out how to do it. I have been...
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10 years ago
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Bird Friendly Heliostat Solar Thermal
Stopping a megawatt wind turbine on a dime to save a bird might introduce structural issues. That isn't the case with solar thermal. Radar or sonar can track each bird as it passes through feeding...
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10 years ago
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winding an electromagnet on a nail
When I was a kid, I wound a nail with enamel-coated wire, starting from the head of the nail, then when I reached the tip, I would wind towards the head again (still in the same direction of rotation...
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10 years ago
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Optimum electromagnet dimensions
Using an air core electromagnet with a given length of wire, what dimension s would be optimum for maximum force against a permanent magnet in close pr oximity? Should the electromagnet be wound with...
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10 years ago
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Buck-boost DC-DC converter online simulation
Online simulation of buck-boost converter DC-DC converter is ready. Buck-boost DC-DC converter has special feature that output voltage is with negative polarity, and absolute value of the output...
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10 years ago
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HF design approach
Hello to all, I am designing an amplifier for frequencies between 500khz to 5Mhz. (+/-40V ) a couple of watts. I am a newbie to HF frequencies , but I would like to know what is the best amplifier...
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10 years ago
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Windows Log In Question
I have my wife's computer set up so that, after some length of time of no usage, it logs her off, requiring password entry to get back in. I did this when we had to deal daily with the autistic...
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10 years ago
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Random Timing Echo Noise Reduction
Downwardly mobile types in apts may have noticed that it is 100% useless 95% of the time to tell the meth head next door to turn down the music at 2 am. The cops appear and within 45 seconds after the...
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10 years ago
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Joule Thief inductor cores
What material is ideal for low-power Joule Thief inductor cores? Ferrite, or powdered iron? Is an air gap desired, or not? I saw an ad for a "high permeability" toroid but the material was not...
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10 years ago
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Fiberglass Sleeves for Old Worn Spark Plug Wires
After the insulation melts on the wires just slide the conductors into the insulating sleeves.
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10 years ago
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Protection for CMOS output?
I want to build a simple manual count-up system with a local as well as a remote 2-digit display. The system will be based on discrete CD4xxx CMOS logic and the count pulses will be sent to the remote...
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10 years ago
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Buck DC-DC converter online simulation
Online simulation of buck (step-down) DC-DC converter is ready. Read theory of operation:
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10 years ago
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Electronically Removing Just the Brass From the Supp é Light Calvary Overture
No, just making a recording w/o the trumpets isn't what is desired. Bret Cahill
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10 years ago
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