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September 22nd, 2015, 12:32 AM   #81
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No, there's no benefit to that at all

Battery technology still has a very long way to go, nobody has any significant new bat tech coming out (despite the hype), it's all incremental increases.
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September 26th, 2015, 12:16 AM   #82
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What's a good circuit to understand?
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September 27th, 2015, 09:35 AM   #83
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What's so great about the Colpitts and Hartley oscillators?
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September 28th, 2015, 12:40 AM   #84
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All circuits are good to understand, especially ones which don't work

Those oscillators were invented almost 100 years ago, not sure what's great about them, I rarely use them myself.
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October 3rd, 2015, 03:20 PM   #85
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Can my electronics lab be a fun toy? If so, how can I have fun with it?
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October 5th, 2015, 01:12 AM   #86
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That's an interesting question, but I'm not sure I have an answer, partly because I don't know what it contains apart from the bits I could see from the picture.
Does it contain a 555 timer? They can be fun.
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October 5th, 2015, 10:25 AM   #87
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Yes, both my RadioShack electronics have a 555 timer., the one you've seen and the other one is a sensors lab.
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October 6th, 2015, 01:16 AM   #88
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Great, there's all sorts of things you can do with those, and they are easy to learn.
Here's a page with 122 circuits:
555 Timer Circuits
I pretty much started my life in electronics with 555's, they are a good way in because you can achieve something that's fun (well, it was fun 25 years ago )
Solid state whoopee cushion springs to mind...
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October 11th, 2015, 02:50 PM   #89
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BJT transistor is current-driven. How is this? Isn't it voltage-driven by the base-emitter?
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October 12th, 2015, 02:59 AM   #90
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You can control it with voltage, however, the active base-emitter voltage region is quite small. Current control is much simpler to understand.

https://en.wikipedia.org/wiki/Bipola...ion_transistor

Section: "Voltage, current, and charge control"

4th paragraph:
In analog circuit design, the current-control view is sometimes used because it is approximately linear. That is, the collector current is approximately beta_F times the base current. Some basic circuits can be designed by assuming that the emitter–base voltage is approximately constant, and that collector current is beta times the base current.
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