New answers tagged

2

There are two ways to combine a Wimshurst and a homopolar generator. Let's say the first delivers 1 MV and 1 μA, the second delivers 100 mV and 1000 A, both into a suitable load of course. In series. The voltages add, to get 1,000,000.1 V, the current is limited to 1 μA by the Wimshurst. In parallel. The currents add, to ...


2

Power is the product of voltage and current, specified as a law (Ohm's law) as W (power) = E (voltage) * I (current). You've given examples of high current and low voltage, low current and high voltage, but both are low power because they're a large value times a small value. To get high power, you need to make the product E * I be a large value. So what ...


0

Something like this should work. Comparators are usually slightly biased (biasing not shown - could perhaps just be drop across wiring with proper design) such that when fuses are not blown comparator outputs are high and LED not lit. If say battery B12 blows fuse 4 then B12 voltage rises under sudden no load. Comparator 2 in- rises above its in+ and ...


0

In absence of individual current regulation for each led, the total current of leds connected in parallel is unpredictable. One led may draw more current than another one, apparently identical. The difference between red and blue is even higher. I imagine these are 12V leds. But you need to know the maximum current which can be used for each led and then, ...


0

Two batteries store the same energy, whether connected series or parallel. If the load can accept either voltage, and deal with it in an energy efficient way using switch mode rather than linear power handling, which it sounds like it can from your assertion that run time is 11.2 hours for either configuration, then there's no difference for run time. The ...


0

When running motors in parallel, you may have overcurrent problems that can damage your motors if you are pushing the limits of what your motors can do and then one of the connections for a single motor disconnects. This will put higher current on the other motors. Wiring in a series is safer in this case because all the motors would just stop functioning ...


2

You yet have to connect Line 29 with Line 30. Then your curcuit represents your formula.


0

Resistor value What is the resistor value 570 ohm for? Does it really matter if it is that precise? If 550 ohm would suffice, just add a 330 and 220 ohm resistor to get 550 ohm. Note that each resistor has an accuracy so probably with two 5% precision resistors you get away with 550 ohms. Breadboard To put this on a breadboard, place one resistor from e....


0

You will find the negative pole where there is a white band with sparrows on the side of the capacitor. I don't think there will be a problem using 5 x 10uF... but one 47uF cap is not that expensive neither and may be easier to mount.


0

Wondering what effect the slight variation in capacitance might have Almost certainly none. It's 6% Most large-ish capacitors have very wide tolerances in the first place, and circuits which use them are very rarely sensitive. Good background at Wikipedia, which says: Electrolytic capacitors, which are often used for filtering and bypassing, do not ...


2

Polarity? Use an ohm-meter to find what else is connected the cap traces. You may find the polarity on one of those. Ground/Power pours may be recognizable. See if it is connected to any. Check polarity on other devices connected to the pour. -ve side of caps, GND pins of IC's, etc. The major difference with 5 caps in parallel to make 50uF may not be ...


1

In general the answer is no, unless the power supply specifically states that multiple units can be connected in parallel. Power supplies that have this capability have additional circuitry/controls to ensure that the load is being shared equally between the supplies. What could happen if the supply is not designed for parallel operation is that one power ...


1

The STM32H732VI has a LCD-TFT peripheral to drive the RGB interface directly, but if you don't want to use it, you better use the Flexible Memory Controller (FMC) peripheral to map the LCD display into memory bus, so DMA can be used with it. Connecting it to simple GPIOs can't really use DMA, or at least it would be awkward to use DMA to toggle GPIOs to get ...


Top 50 recent answers are included