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Re: What does it mean by Gain & Offset ? By rotating the screw of pot. of Gain & offs
Remember the simple mathematical equation of a straight line
y=mx+c
m is the gain and c is the offset.
You can refer to https://www.teacherschoice.com.au/maths_library/functions/y_=_mx_+_c.htm
In case of...
Re: metal detector
Other good places to find complete design of metal detectors are patents.
And metals may also be detected using magnetometers, two box detectors etc.
Re: job less (from UK)
I am sorry to know.
and its not always the technology, it is the use of technology which matters.
weapon systems/defense may be a good area to get in. You could possibly look for openings in support etc. which is still booming.
jaycar zd-0420
Grind the front hemisphere of the LED to flat. Use 000 sand paper or smooth (but not polished) stone.
It works, I have used this method.
Re: What is best way to operate 95 Bright Green LED in paral
I guess, the practice of using ONE RESISTOR for all LEDs is not recommended. Let us assume that one of the LEDs turns on at 2.7V and other turn on at 2.75V.
This one LED will now hog most of the current and burn out. This will...
What is the current consumption per LED?
Let us assume that each LED has a forward drop of 3.5 V at 20 mA driving current, thus consuming about 70mW. Therefore your array should be consuming 5 W.
However if you are driving it using full rectified AC, take this down to 63%.
I guess, 5W (or...
It may be better to try using Linux.
Boot with a live CD of Linux. Knoppix Slax etc. (or install Ubuntu, Fedora etc.)
And install it after you gain some familiarity with Linux.
Read http://www.grokdoc.net/index.php/Switching_to_Linux
Go to a college physics lab and look at the wet & dry bulb humidity meter working principles.
Use this to calibrate your sensor.
Also, check the effect of temperature on your sensor.
Also, you could convert the LUT into an equation using...
Cascade 4017s.
see 18 Stage LED Sequencer at **broken link removed**
also check 60 Light Sequencer using a Matrix on the page above.
check 4017 data sheet.
There are multiple ways :
(a) Use a bandpass filter to extract second harmonic, if the signal is digital.
(b) Use two edge triggered monostables, one triggered by positive edge and other by negative edge, OR the out puts, keep the period of monostables less than quarter of the original half...
In that case, if the coils are concentric and one coil rotates inside (or outside) the other along the circumference, the transformer is literally same as stationary transformer (the ones we are familiar with).
You can use AC to drive the power into one coil and extract power from the other...
cheap stepper motors in malaysia
Check the current requirement for the motor and then choose the 317.
The 317 should be able to handle all the current required by motor, driving circuit, digital (and analog) electronics.
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