Latest threads in Hobby Electronics Basicsshow only best voted threads
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help fix my Lord Kelvin thunderstorm
trying to learn the kids (via discovery) about electricity and how to generate etc.. We were working through static electricity, rubbing various items like a poly fur blanket and produce visible...
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10 years ago
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Injection Locking an Oscillator (was Novel Zeitgeber devive for antique clock)
PAL fails to realize that injection locking an oscillator requires an oscillator >:-} His post was an attempt to output a subharmonic without the oscillator. There are better ways to handle such a...
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10 years ago
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More Math for the "SETUP"
The ?setup? is a board that I'm testing to measure three items: Input voltage, Voltage across a 47.5 ohm sense resistor, Phase difference between these two voltages. All measurements are on a scope at...
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10 years ago
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61 | |
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A reliable light sensing circuit?
It's been a few years since I did any significant electronics in my shed/ w orkshop. But I'm going to have to get stuck in again because I need to rede sign my light sensing circuits. I've used LDRs...
6
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10 years ago
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Any speaker experts here?
This speaker question kinda goes with my previous question(s) about tubes. I have been looking at tube stuff on the web and some of it really appeals to me. I'm a machinist and have a shop so making...
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10 years ago
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32 | |
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I have question about R L Mathematics
I have beads* on a coax and want to know the R and the L. I have measured the R at 3.85MHz, It is 3,350 ohms. I have also measured the phase shift, voltage leading by 17ns. The period of 3.85Mhz is...
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10 years ago
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60 | |
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Broadcast TV format question
I watch some programs on PBS TV that are strangely formatted. The video image is bordered on all 4 sides by black. This makes for a quite smaller image. If this were an aspect ration issue the image...
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10 years ago
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Max Frequency of SM 118A counter?
Anyone know the maximum frequency of a Heathkit SM-118A? I have been all over Google with little luck. One guy said it would go to 1 GHz maybe 2 GHz, I don't think so. Mikek
20
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10 years ago
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20 | |
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LTspice Tutorials now available
LTspice Tutorials now available on the Simulation Tools & Macros page of my website... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and...
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10 years ago
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34 | |
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Solenoid question
Permanent magnet motors put out more HP in a given volume than AC induction motors and DC motors with a wound field. So It's obvious that using permanent magnets is an advantage when it comes to size....
4
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10 years ago
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Fuzzy logic
Fuzzy logic is advanced concept for data processing and analyzing. It is based upon human-like way of thinking and it is powerful tool for analysis of multidimensional data. Now, free web online...
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10 years ago
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OT: Wood Staining Question
Staining the wine-glass rack came out looking so nice SWMBO asked if I could stain a kitchen implement holder that's bamboo (*) (*) Apparently by stacking layers of bamboo, then turning in a lathe. It...
6
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10 years ago
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Unsolderable wire?
I am trying to solder some RG-6 shield to a pcb. The braid won't tin. It's almost like it's dissipating the heat faster than I can apply it. With both a temp-controlled iron (set as high as 700F) and...
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10 years ago
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Using RF to monitor location (cat)
I'd like find out where my cat is when he is prowling around the neighborhood. My plan is to attach an RF transmitter on his collar and use a home computer & google earth to plot his movements. What...
3
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10 years ago
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Why the high price for tube amps?
I have been thinking about making a tube amp for fun so I can compare the sound to a good solid state amp and because I like making things. I remember with fondness the sound from my old tube amps...
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10 years ago
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