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Hi
This is the first time I heard that:
pleas give me a page link that explain that point more.
No it is a ferrite core. Now I hold it in my hand and I see it with my own eyes it is a ferrite
Yes it use a high impedance piezo transducer instead of an 8 ohm speaker.
thank you guru
Hello
From: **broken link removed**
I read all the page and have some questions and hope someone (like Jony130) respond
Q1) Can someone give values for the circuit below as it is,,, I know it is a basic circuit but I want to build it and see some waveforms on my new oscilloscope.
**broken link...
not at all
Please look here at the cycle buzzer:
https://reprap.org/wiki/Scratchbuilt_Piezo_Printhead
and here:
https://reprap.org/wiki/File:Cycle_buzzer.jpg
the transformer is a ferrite core,, I have one in my house for my child
thank you
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Yes
Unfortunately, I did not...
OK
I have not an Impedance Meter but i'll experiment with my audio transformers.
No, I think it would work
I see some chinees circuits using ferrite core transformer as audio transformer
is it negative feedback (from collector back to Base)?
Thank you
Hi
From: **broken link removed**
**broken link removed**
Q1) How do I know that my audio transformer is 1K : 8R? Is it by simply measure the DC resistance?
Q2) If I wanted to use a ferrite core, how much should the number of turns for the primary and secondary coils, and will this core be...
In
**broken link removed**
I read: (….. It contains seven open collector Darlington pairs with common emitters.) What does he mean by saying common emitter? Is he mean all emitters of the 7 Darlington pairs are all connected together and with the common ground (pin #8)?
How to use pin #9...
I need a 1KHz 20mVp-p sine wave oscillator?
I searched in Google and found many circuits but no one of them worked properly especially when the output is lowered to 20mVp-p. I have an oscilloscope of 50 MHz BW. I need that circuit to be used as a function generator to examine some low frequency...
Hi
I've built a following circuit:
Voltage at node (2) is about 2V. If I disconnect (R3) at node (3) and the circuit is powered ON then the voltage at the top of cap (C1) is gradually increasing from 0 to 2 volt. But if (R3) is reconnected then the voltage at node (3) never increase more than...
Hello
From:
https://www.learnabout-electronics.org/Oscillators/osc41.php
I read under Title " Astable Operation ":
I could not understand what is underlined. I understand how each transistor turns on but I could not understand how it becomes OFF
Thanks to everyone who tries to help
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