2d
comment How do pixels in a LCD display are individually controlled by a electrode?
ITO is conductive and transparent. If you "build" the substrate on it then you can use it as either anode or cathode. The only difference is there's no copper or any other metal based traces. And if you apply different voltage levels or drive currents (e.g. via DACs for digital applications) then you'll get different brightness levels.
2d
comment How do pixels in a LCD display are individually controlled by a electrode?
Via DACs maybe?
2d
comment Power of an adapter working with different input voltages
Voltage-current product should remain nearly same under guaranteed supply voltage range. So, if the supply voltage increases then the supply current decreases.
2d
comment I am stuck at this step C(AB+A'B')(simplify using boolean laws)
By the way, ABC+A'B'C+AB = AB(C+1)+A'B'C=AB+A'B'C. Still this cant be simplified more.
Jul
10
comment Discharging capacitors with a multi-meter in diode mode
In Fluke's website they say that no voltage should be applied to the leads when the meter is in diode-test mode since the meter drives the target device with a current source. Connecting the charged capacitor even in reverse (as stated in the question) can be still dangerous for the meter. Why not use a screwdriver instead :)
Jun
27
comment Ballast Power Draw
You say that there's one ballast for each 36W fluorescent lamp, but according to the ballast specs the ballast is for 150W (or 2x 70W) lamps. Please note that electronic ballasts are designed to drive the lamp with full power. So you shouldn't use that ballast with a 36W lamp. Also please provide the datasheeet or at least the model number of the ballast.
Jun
25
answered What power adapter do I need to charge a 7.2V 4000mAh battery that I made?
Jun
24
awarded  Taxonomist
Jun
24
comment Problem with LED strips
Does the CC LED glow? If so then the supply enters overcurrent (set to 1A via Current knob). You can increase the limit by turning the Current knob clockwise.
Jun
23
comment 1000 W Arduino dimmer
In addition to Szidor's answer below, I'd like to say that the traces are too thin (Assuming the second image shows the actual layout).
Jun
4
revised Dual N-channel mosfet Rdson value
added 219 characters in body
Jun
4
comment Dual N-channel mosfet Rdson value
This actually approves that the values are given for a single MOSFET but the package (IOW, the junction trmperature) is a limiting factor. Think about this: If you drive one MOSFET only and the drain current is 11A then the junction temperature will reach the max allowed value, 150°C. Because the Rth from junction to amb is 89°C/W hence max allowed temp rise is (for 24°C amb) is 126/89 = ~1.41W thus Rds = 1410/121 = 11.7mR - pretty close to the datasheet values.
Jun
4
answered Dual N-channel mosfet Rdson value
May
19
answered Transformers: Short-circuit test
May
8
comment SMPS voltage drop in 230v ac to 5v dc flyback
Probably the core approaches to the saturation point as the load current increases. Does the core of the transformer (actually, it's a coupled inductor) have air gap?
May
7
awarded  Nice Answer
May
7
comment Single supply non-inverting amplifier using op amp
@alexamvdor C2+R3 form a high pass filter and its cutoff frequency determines the low-end (i.e. -3dB point) of the amplifier's bandwidth. With the values above, this frequency is ~34Hz which means that the amplifier will never amplify the frequencies below 34Hz. This makes sense because in a standard-tuned six-string guitar the lowest frequency is 82Hz (low E). Even if you play a seven-string guitar (like me, hehe) the lowest frequency is 61Hz (low B) which is still in the bandwidth of the amplifier.
May
7
revised Single supply non-inverting amplifier using op amp
added 2 characters in body
May
7
answered Single supply non-inverting amplifier using op amp
May
6
comment Regulating VAC transformer voltage
@M2T156 Ok, but what about the load? What are you driving with this regulator? Or in other words, what is connected to the output of this regulator?