Latest threads in Hobby Electronics Basicsshow only best voted threads
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Superposition theorem
Superposition theorem is one of those strokes of genius that takes a complex subject and simplifies it in a way that makes perfect sense. It is very useful for solving tricky electrical circuits, Just...
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14 years ago
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Voltage Regulator 041M03
Can't find any info on this device. I need to know what the output voltage should be. I'm assuming 3 volts, but would like to know for sure. It is getting red hot on the circuit board and is...
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14 years ago
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DC current through a domestic supply meter
These questions came up through some discussion on another technically/ scientifically unrelated news group ................... ? 1) What happens if a DC current** flows through a domestic/residence...
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14 years ago
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Free electrontube catalogue for Windows and Linux
1.0pre3 version of 'Tubes' electrontube catalogue is available to download. Licence: GNU GPL 3.0. Programme and database languages: English, Hungarian. Operation systems: Windows (tested on Windows...
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14 years ago
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Power supply problem (?)
Hello all, I was hoping someone might be able to help with a problem I've been having with a TV lift I built. I have an actuator that raises and lowers a TV for the bedroom. It's wired with a DPDT...
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14 years ago
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Identifying Infared LEDs
I have a Infrared LED transmitter and receiver that is part of a redemption game and I need to get some new ones. The distributor wants $100.00 for a pair of them. Of course the distributor or the...
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14 years ago
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Test your Signal Integrity skills with this set of quiz
Here are some questions on Signal Integrity .These tests have been taken from the Book - "Signal Integrity for PCB Designers". Find new singles & make friends. Chat, meet & date with Matchmaker
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14 years ago
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Switching power supplies and overcurrent protection
I see three types of overcurrent proctection in SPSs these days - Shutdown, hiccup mode and constant current limiting. Unlike with shutdown and hiccup types, is it correct to assume that voltage is...
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14 years ago
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WTF happened to this ng?
I go on a 16-month hiatus from electronics. I come back and the Sound/ Spam ratio is unbearable. Damn, what a shame. I loved this group. -J
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14 years ago
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A question about coil winding
DQoiSm9zZXBpIiA8SlJNQGludi5hbGlkLmNvbT4gd3JvdGUgaW4gbWVzc2FnZSBuZXdzOlhpcldt LjEwNzA4OCRnZzYuODYxODhAbmV3c2ZlMjUuaWFkLi4uDQo+IFRoZSBoZWF0IGRpc2FwYXRpb24g...
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14 years ago
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SPDT debounce doesn't
+5v +-----------------------------+---- | ____|________ +--o_ | | -_ 11| 74hc595 | -o--+-------------[| | | |____________| +--o === 100nF | | | | 0v+----------+------------------+ I've been told the...
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14 years ago
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Christmas tree light question
Yes, it's that time of the year when men swear at tree lights, just as I am doing now %&&*%*^$&^$%&^$%*&(^(*&%!!! We have a pre-lighted tree with the lights that stay lit when a bulb goes out or is...
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14 years ago
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LED direct replacement for flashlight bulbs?
Kinda outta date here. Most of our stuff is old, but it works; or if it doesn't we fix it asap. So is it possible now to buy direct LED replacement for the traditional two and three cell flashlight...
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14 years ago
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Where Can I Get an Older Duracell Two Battery Flashlight?
I've been buying Subject flashlights for years, but they seem either discontinued or scarce. The one I buy is about 5x2.5x0.75", squarish, orangish trim around the light and a dark (black) handle. One...
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14 years ago
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photons and reflection
According to the wave theory of light, angle of incidence equals angle of reflection. No problem, in theory or fact. However, per QM, light falls as a 'rain' of photons. What happens then? As I...
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14 years ago
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