Latest threads in Hobby Electronics Basicsshow only best voted threads
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Capacitor Tester
I dont have a capacitor tester. (Well a very small one on my Digital meter) I want one that is good general use. Some seem to only go to 100 or 200 uF. I think you really need something that goes to...
30
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5 years ago
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30 | |
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current regulator
The block diagram shows this as a closed-loop regulator, not just some jfet sort of thing. The high minimum voltage and unspecified capacitance/speed limits its use, but it is cute.
14
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5 years ago
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14 | |
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What size of surface-mount components is good for a beginner?
Greetings one and all I am laying plans to start working with SMT for the first time. Would 0805 components be a suitable size for a beginner, or would another size be appropriate? I have been a...
31
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5 years ago
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31 | |
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A balanced 12AX7 based buffer
I'd like to "design" and implement a simple 12AX7-based buffer for musical instrument DI purposes. I'd like the output to be balanced for ... no good reason at all beyond having balanced inputs to...
7
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6 years ago
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7 | |
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The wiper in a variac
I have been thinking about the way a variac works. One thing that puzzles me, is the wiper design: If the wiper is too narrow, the output voltage will cut out when the wiper is between two turns of...
7
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6 years ago
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7 | |
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Trickle charge C-type NiMh?
I have some inexpensive 220 mAH C-type Ni-Mh batteries, The equivalent 3300 mAh C-Types I bought a couple of years ago specified charging with 330 mA for 16 hours, but these new ones have no charging...
6
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6 years ago
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6 | |
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A question about relays
I was poking around in my truck the other day and had cause to open up the starter relay. (not the solenoid, the relay that energizes the solenoid) I was amazed at the size of the contacts. They were...
21
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6 years ago
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21 | |
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Anyone here know BLDC motors well? Hobby ones particularly?
I want to use a hobby BLDC motor to power a compact high speed spindle to be used for engraving and the like. Mainly because they are so compact for the power and speed. I cannot find, for a price I...
5
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6 years ago
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5 | |
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Using a TO-220 heat sink
Hi, To attach an LM317 (for example) in the TO-220 format to the corresponding heat sink (see link below), is it useful to apply any thermal paste in addition to the flexible mat that comes with the...
41
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6 years ago
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41 | |
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Place Marker
That's right, in between the spam. Everything after this post is post the latest batch of spam, and everything before is...before.
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6 years ago
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(plastic) optical fibre
Hi, I want to learn a more and experiment with optical fibre, especially for communication. Does somebody here have any experience with this (at a hobbyist level)? There seams to exist a kit called...
11
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6 years ago
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11 | |
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Torque Vs Speed curve of the Stepper motor
Hi, Does torque vs speed curve tell anything about the acceleration and deceleration characteristics of a stepper motor? Farah
7
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6 years ago
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7 | |
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Psu for valves
I wish to experiment with valves (or tubes, if you prefer) and I shall begin by building a power supply. What voltages (at what currents) should it supply? Where may I find circuits? Naturally, the...
20
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6 years ago
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20 | |
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mystery tool
In a hardware store, I saw a rectangular bar, 10" long, with two through holes, labeled "MAGNETIZE" and "DEMAGNETIZE". Presumably it has a battery compartment, though I didn't check. What's inside?
4
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6 years ago
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4 | |
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Even Tesla Missed This Low Hanging Fruit Calculation
Apparently there are some really basic [no brainer] calculations that everyone somehow missed. I can't say anything because I missed it as well even though I knew for years they were looking at fly...
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6 years ago
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