FuzZ

[Thomas]

I had an Idea hit me, usually it's rocks, but this time it's circuits that I've found while bottom fishing the Internet.
I save them for possible uses on future projects. Don't know if they are good, great or a waste of time, but I find them interesting.
Here are some.


More later, if there is a interest, I may be the last to know that every one has all ready seen them.

[Qiaozhi]

I had an Idea hit me, usually it's rocks, but this time it's circuits that I've found while bottom fishing the Internet.
I save them for possible uses on future projects. Don't know if they are good, great or a waste of time, but I find them interesting.
Here are some.
[ATTACH]34456[/ATTACH] [ATTACH]34458[/ATTACH] [ATTACH]34459[/ATTACH] [ATTACH]34460[/ATTACH]
[ATTACH]34457[/ATTACH] [ATTACH]34461[/ATTACH]
More later, if there is a interest, I may be the last to know that every one has all ready seen them.

The binary state LED indicator is a neat solution.

[Thomas]

A few more.

the LCD probe is supposed to be a 40106, but I changed it for SOT 23-5 NOT gates.
here it is

[DOOLEY]

hello THOMAS,

the voltage inverter diagram, could be done with a 40106 I rekon,
and have its own oscillator,
could also do voltage double also,
40106's can only do small current though if I remember right.
no match for a 7660.


ah,
that speaker driver looks very close to being a "SZIKLAI" pair...............

[Thomas]

Some more.

[WM6]

Useful. Thanks.
Don't stop to give us some more.

[Thomas]

Here ya go

[Thomas]

found some more .

[WM6]

Nice solutions Thomas, thanks.
I am searching for simple (one to two TR, or one IC or so), LC controlled burst oscillator/generator.
Burst repetition rate in audio range. Found nothing useful on web.
Maybe you have something in this field?

[Thomas]

WM6, I'm not sure what a LC controlled burst oscillator/generator is so if the stuff I post isn't correct, I'll keep looking

[WM6]

Sorry Thomas, that I wasn't clear enough.

I am searching for (preferably one) transistor self-oscillating (mean no input signal or trigger from outside) Colpitts LC Burst oscillator with basic (carrier) frequency in HF range (say 50-100kHz) and burst repetition rate in audio range. Simple as much as possible.

Something like "GatingOSC.png" solution you posted in last circuit collection but LC controlled instead of RC controlled like in mentioned design.

"LC controlled" mean that LC tank circuit control oscillations. Other oscillation controlling means could be Crystal controlled or RC controlled.

Google search gave almost nothing in mentioned one transistor simple colpitts design. Found one Hartley design, but I am not happy with taped coil winding.

Your "GatingOSC.png" could be basis for conversion to LC design, thanks for this as for other interesting ideas. If you have something more in explained way, I would be grateful.

[Thomas]

Well,I didn't find what your wanting, but I did find some interesting stuff so I'll post that.
I also learned that pulsed OSC is also used for a gated OSC.
2SC2078_Pulsed_Oscillator.pdf

[WM6]

Thanks, I got some new ideas from circuits you posted.

[Thomas]

yes, I had an Idea also, if I used a variable freq. (sort of like a radar chirp) in the pulses, I wonder if....

[WM6]

Bursts could contain sweeped variable frequency, but not needed.
I wish burst generator be adaptable to such output signal: