Latest threads in Hobby Electronics Basicsshow only best voted threads
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Non-thermal microwave injuries
When the first reports of diplomats at the American Havana Embassy falling ill were caused by microwave injuries it seemd quite implausible. Now it seems more incidents have emerged, and the Frey...
3
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2 years ago
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3 | |
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E field impedance
As the story goes, the E field starts with high impedance and it goes down until it's equal to the H field impedance in the far field. It's just so counter-intuitive that impedance would go down as...
10
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2 years ago
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10 | |
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Through Board Desoldering High Melting Point Solder
The power wires for a 500 watt ebike motor go through the board. It there any off the shelf insulator designed to protect the caps and other components only 13 mm away? This is asking for a torch....
6
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2 years ago
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6 | |
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MCU reset during relay switches ON
Hi, Could any please suggest how to avoid MCU reset with voltage glitches/noise during relay switches ON. I have protected the relay coil with free wheeling diode and MCU with 2x10uF parallel with...
7
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2 years ago
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7 | |
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"Technology Is Directional" <=> "Low Hanging Fruit Everywhere"
It's easy for a lazy thinker -- that's everyone in some respect -- to get d istracted from the possible by studying thermodynamics which focuses on the impossible. Obviously the "cardinality" of the...
4
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2 years ago
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4 | |
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Experiment to show that current leads voltage by 90 degrees in capacitor (Using RC circuit and Oscilloscope)
Many books told me that current leads voltage by 90 degrees in capacitor. So, I designed an experiment to show that it is true. You can do the experiment at home or in the laboratory. Here is my...
9
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2 years ago
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9 | |
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Who knows GPS antennas?
I have been looking online but there seems to be, for a lot of the antennas, an assumption of prior knowledge. That I don't have. What I want to do is survey some of my property line. Mainly so I know...
2
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2 years ago
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Solid state relay questions
My water comes from a well. When the well was drilled I had only built my shop and so the well is now powered by my shop. The pressure tank and switch is also at the shop. Now that the house is built...
8
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2 years ago
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8 | |
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results of AC buck tranny
I wired a 24VAC transformer to my Air Conditioner to lower the incoming line voltage to 220 from ~250 VAC. The old AC was pulling 2100+ watts worst-case and went to 1700, with the added transformer....
8
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2 years ago
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8 | |
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Virtual PID Controller Would Optimize Shutdowns In Pandemics, Reduce KornspiraSCHEE Theories
"Abbott didn't properly calculate lag time after lifting restrictions." It's easy to overshoot as well. The PID output would be presented to the public, so the public could better understand the...
10
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2 years ago
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10 | |
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how to reduce the mains voltage
I have an older window air conditioner that I'd like to hang on to for a few more years. The name plate says it is 220 VAC and since the power company went through and upgraded the distribution...
26
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2 years ago
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26 | |
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Solder these 2 wires while being able to slip the shrink tubing over the soldered connection
I would like to learn how to solder these 2 wires while being able to slip the shrink tubing over the soldered connection. Thanks.
4
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2 years ago
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4 | |
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Error of % + digits?
I just bought an amp clamp meter, and it states the error is "+/- 1.9% + 3 digits". What does the "3 digits" part mean?
125
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2 years ago
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125 | |
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Turn on Dynamic Range Compression
I am trying to turn on Dynamic Range Compression or D.COMP as Denon calls it. I got up to and finished step 5. But instead of going to step 6, it went to step 8, Default Y/N. Step 6 is where you can...
3
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2 years ago
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Subwoofer help
I would like to add a sub-woofer to my home theater system. My system calls for speakers in the 6 -> 16 ohm range. When I searched Ebay, I found some speakers, but found out that they need a...
5
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2 years ago
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