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3

2mm trace is about 78mil. For an external trace carrying 5A that heats up by 20.2 K. Assuming you mis-etch by 10%, leaves >= 70mil. With 6A gives a rise of 31.8 K. So at ambient of 30degrees C a single 2mm trace on top or bottom carrying 6A with good enough manual etching will become about 62 degrees Celcius. That may not be very good for a precision ...


2

The FETs can hog current upto 500 mA. For higher load, it is very easy to find FETs with low Vgs threshold. Before pressing the switch SW1, M1 will be off since Vgs is zero. Once switch is pressed, M3 turns on followed by M1 followed by M2. M2 holds the ground to gate of M1 there onwards. When SW2 is pressed, M2 releases the Gate of M1, making the Vgs of M1 ...


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To clear the selection of the Find Similar Objects use the SHIFT + C hotkey. After performing the edit, you will probably find that all the other objects on the schematic are faded out, or masked. While something is masked it cannot be edited, to remove the mask click the Clear button at the bottom right of the workspace [shortcut: SHIFT + C]. Page ...


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An even simpler solution than ThreePhaseEel's is to build two of the kits, with the CDS substituted with a resistor as you suggest. Additionally, modify the connection to the relay, so that power flows via the normally closed contact rather than the normally open contact. Finally, plug the first kit into the power, and the second kit into the first kit. The ...


2

This modification consists of two parts: an easy part and a slightly harder part :) You'll need a: 74HC32 OR gate IC in a DIP package Another PIR sensor, identical to that in the kit A scrap of perfboard/veroboard/... More of the phone wire called for by the kit And a 200kΩ, 1/4W resistor (Radded in the schematic below) The first step is to enable ...


1

Accurately modeling the crosstalk between the power cables and the signal cables requires a rather advanced model. However, using a simple pessimistic model, we can get some idea of wether there will be a problem or not. Let's assume both the signal trace and the power wire are 1 mm apart, and run in parallell for 0.1 m. This is a much worse case than your ...


2

I am the author of the ADI application note. I just now encountered this blog by googling the name of the article/application note. Of course flyback can work, but that introduces transformer leakage inductance which causes spikes and ringing. This usually needs snubbing; that hurts efficiency. Even with snubbing you will probably require a higher ...


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I always use this website to calculate current carrying capacity. http://skottanselektronik.com/


0

All of the 8 2-to-4 decoders share their 2 inputs and you need another 3-to-8 decoder to select only one of those 8 2-to-4 decoders. So you have a total of 2 + 3 = 5 inputs.


1

63A is a lot of current and depending on the load running may have high THD. Since you mention the PCB shape and component placing is final an appropriate solution would be to have a pre-fab cable connecting the two.


4

The schematic you show is just fine. In general, more sheets is only a minor concern, and certainly way down the priority list relative to clarity. In fact, breaking schematics into multiple sheets can help in the same way we break down a long narrative into paragraphs. You can then label each sheet with the particular section of the circuit it shows, ...


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As drawn, there's no doubt about how things connect. If you'd like to make it more obvious what is going on then I'd draw one of these two ways: simulate this circuit – Schematic created using CircuitLab Electrically, it is the same. From looking, though, it is obvious that you have a voltage divider on the Signal line and that your capacitor ...


1

I'm looking for something similar for a micro-controller driven robot that needs to drive two tiny DC motors that I believe operate at around 1.5v. Until recently I had only been familiar with the L293D (Dual H-bridge) which is considered a low voltage motor driver, but not low enough for my application. I was advised to look into using a mosfet driver as ...



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