T&L Publications

I repeat my question again. I have ever seen a gambling machine in casino when I was a child. This gambling machine is trick, dices result could be decided BEFORE throwing. It means the dices could be decided which side is up by computer, gambling machine. I have ever seen a special and accident sit...

my question is "how to decide the value of dice after throwing".
I guess maybe there is magnet in the dice.

But, the dice has 6 faces.
How to use magnet to decide which dice toward upside?

I have ever seen a gambling machine, that dices could be controled by the machine.
It means the machine could decide the result after throwing dices.
Do you know how it work?
How to make it?

Appreciated.

I produce a signal equation of sinusoid with 8MHZ and 1Vp-p. Then, take it to DFT. I got the result, the peak is 4 dbm, noisefloor is about -170dbm in freqency domain. If I want to add some noise to input signal, upgrade the noise floor to -30dbm. What is the last equation of input signal? What is t...

Does your company have web site?

FFT is easy to understand it, if we just see its theory formula.
But, if we want to implement to be a practical Instrument, it will have a little bit challenge. <p>Here is my problems that I encounter.
Check it out.
http://justfun.why3s.net/others/FFT2tone.doc

http://ourworld.compuserve.com/homepages/Bill_Bowden/page4.htm#ps6.gif In this circuit, in second side, there are 2 sets output, but it is hard to buy it in market. Is it possible to buy a transform that only has 12.6, CT, -12.6 output? but, there will be 2 sets of ground in the system when switchi...

N=512; % point numbers f=11; fs=44000; %sampling freq. <p>t=0:N-1; q=1; for f=11:11:22000 % freq. varies y=sin(2*pi*f*t/fs); fy1=zeros(1,N/2); fy2=zeros(1,N/2); <p>for j=1:N/2 for i=1:N fy1(j)=fy1(j)+y(i)*cos(2*pi*j*i/N); fy2(j)=fy2(j)+y(i)*sin(2*pi*j*i/N); end end <p>fy_sum=sqrt(fy1.*fy1+fy2.*fy2);...

I am implementing the Digital Fourier Transform now. After transfering, I got the coefficient of each of freqencies. But, I was confused what the relationship between the coefficient and dbm of real signal. For example, there is a signal with 2Vp-p amplitude and 10Hz input. The signal power is calcu...

Does anyone have power supply circuit that has 0~+/-30v dual output ports function and can be adjusted in voltage and current output?
I'd like to implement one that just for my hobby.
Please offer it as my reference.
Appreciated.

I want to make a phase shifter that can shift the phase 0-90 degree of PLL that role as a local oscillator.
I prefer the existen IC in the market.

I am looking for a phase shift component with 26mhz low pass filter that can shift its phase digitally.
It will be implemented in my receiver project.
Does anyone can give me idea?

I am going to design a BPF, the center is 26MHZ, span is 2MHZ.
After using ADS, I got the result at folling link.
http://homepage14.seed.net.tw/web@1/t0284754/26m.doc
But, I found the value of L2 is 9UF.
How can I make it?
which type core? and how many turns?

Dear fellows,
I got problems when I was implementing a component of AD8367.
Please refer to http://user52.starbeta.org/OTHERs/AD8367-agc.doc
Meanwhile, the circuit I implemented is resonating when the power is ON, and without any input signal.

yes, you got.<p> <blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by cato:
Are you saying that you are using ac coupling as shown in Fig. 2 of the data sheet?<hr></blockquote>