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We are trying to made an pre-amp circuit for microphone using BF245A. In simulation it worked well. But with breadboard we got problem, the output is absolute silent.
Here is our circuit
Our data: as measured, Vg=0V; Vs=~0,4V; Vd=~8,5V. With "Soundcard" oscilloscope could obverse the electret...
Re: Assembly help
I'm learning assembly too. I read Scott MacKenzie's book but I really don't understand about "Assembler directive". Anyone know other document say about this more clearly? Thanks.
Ferrite bead are using widely in many product. But it look like a small value inductor with ferrit core. What different between they. Could I replace ferrite bead by inductor. Pls explain this.
You could use LM317 for this purpose . It's datasheet say "max ΔU=Vin-Vout ≤40V ". And I use 317 for regulator circuit have 42VAC--> 40VDC . It still work . Certainly my circuit use only 80mA but I think with ΔU about 15V-20V and 0.2A, P=3-4W , there is no problem about power .
If you need...
Sorry for so late . Could you explain this file rub.out ; It created from above project . I've setuped my windows, All of my data was lost but this file :cry: . So sad . Now everything in beginning.
I change rub.out to rub.rar
Help me in Pspice
I'm learning Pspice in Orcad 10.5 . But it's hardly to understand something . Could you advice me something about it .
1. I created a basic pulse generator using IC 555 but output still constanst value ( about 2.5volt with 5 VDC source) . No difference from circuit in...
I begin learning Pspice . I'm using PsPice-Orcad10.5 to created a pulse generator with IC 555 in it's basic circuit . I try many times but still receive error message . Maybe this need some tips to work . Anybody give me advice . Thanks.
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