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Hello,
I use a diode to reduce the speed of the AC "shaded-pole motor". but there are some issues:
"noise" and "vibration" of the motor has been increased. ( there is hum voice )
is this vibration and noise damage the motor?
thanks.
Hi,
i have a problem with this part that i think that is a smd Diode. ( picture has been attached )
but i do not know what is it's specification. ( model, company , ... )
would you please help me?
thanks you, yes, filter is correct. but how can i get correct result? in second filter if i increase my signal samples data from 40000 to 100000, but filterign result not acceptable. filter result is too noisy yet.
is there any idea to design a filter that pass only 14.8Hz signal?
thanks
thank you. this is Kaiser bad-pass filter and it's work fine. the point is when 14.7Hz signal and 15.1hz signal amplitude growing up, this filter do not work properly. in this sample r1 ( amplitude of 14.7Hz ) and r2 ( amplitude of 15.1 Hz ) is too big than main Signal ( 14.8 Hz and it's...
I try to simulate a noisy signal and Filter it. the signal mix some low frequency signals and some random noise. my goal is to get 14.8Hz signal. my band-pass bandwidth is 14.7Hz to 14.9Hz.
function filteringTest
Hd = KaiserFilter;
Fs = 4000; % Sampling frequency
T =...
Hello,
I have two PCB s with difference part. i want connect those over each other like this :
( because there is limited space )
How could minimum space between two broad be?
Thanks.
hello,
i used this circuit to turn on lcd back-light(EL) like this :
and this :
but it Sometimes blinking for 4-6 second.( i do not know why )
is there any idea?
thanks
Hello,
I used very simple power supply for my circuit that used a micro-controller.
in my board exists 7812 for stabilization.
is it suitable fr micro?
If i use it, what problems may be occur?
thanks.
Hello,
I have a 220v (AC) heating element. like this :
**broken link removed**
it's work fine and resistace between of terninam and metal body is over 100 mega ohm.
**broken link removed**
but when i turn on the circuit, it's body has ac voltage. i think it is an induced voltage. is it true...
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