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Why usb3.1 Type-C has two Dbus, RXbus and TXbus?

So I am using a camera and making it connect to a hub. The hub only has 9 pins(single Dbus, RXbus and TXbus) while camera has usb3.1 which has double if all these buses (D,RX and TX). So to connect it to a hub can I just short these two buses. What should I do? […]

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Can FPC 0.5mm cause usb 3.0 interference inside itself?

I am designing an 4-port USB 3.0 hub and using fpc 0.5mm connector to connect it to other usb devices. Will using fpc 0.5mm cable have interference because of high data rate? I am talking about the interference inside the cable itself from D+,D- to SSRX or SSTX wire. I have been reading and only […]

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74f269 counter getting very hot

Hi I’m a DIY enthusiast and I got stuck with the circuit that I designed. The counter is getting very hot from the moment It’s powered up. In my setup the 330Ohm resistors at the outputs are connected to GND via a led for each resistor. (not the relays) I omitted the resistors at the […]

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Ask Electrical Engineering Engineering

74f269 counter getting very hot

Hi I’m a DIY enthusiast and I got stuck with the circuit that I designed. The counter is getting very hot from the moment It’s powered up. In my setup the 330Ohm resistors at the outputs are connected to GND via a led for each resistor. (not the relays) I omitted the resistors at the […]

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Ask Electrical Engineering Engineering

troubleshooting tinyprog when programming TinyFPGA BX: [Errno 19] No such device

I am using the TinyFPGA BX for the first time, and tinyprog crashes when I try to program the board. First, I run apio build, and that seems to work fine. But then I try to program the FPGA with tinyprog: $ tinyprog -p hardware.bin TinyProg CLI ———— Using device id 1d50:6130 Only one board […]

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Ask Electrical Engineering Engineering

74f269 counter getting very hot

Hi I’m a DIY enthusiast and I got stuck with the circuit that I designed. The counter is getting very hot from the moment It’s powered up. In my setup the 330Ohm resistors at the outputs are connected to GND via a led for each resistor. (not the relays) I omitted the resistors at the […]

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Ask Electrical Engineering Engineering

What kind of PLL is used to recover the clock from E.G. USB 2.0 data stream

I would like to create a communication protocol to connect two FPGAs. I would like it to be fairly fast, (a couple of 100s of Mbps) but only use a single differential pair. This kind of thing is possible. USB 2.0 uses a single differential pair, and the receiver can reconstruct the clock because the […]

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Ask Electrical Engineering Engineering

74f269 counter getting very hot

Hi I’m a DIY enthusiast and I got stuck with the circuit that I designed. The counter is getting very hot from the moment It’s powered up. In my setup the 330Ohm resistors at the outputs are connected to GND via a led for each resistor. (not the relays) I omitted the resistors at the […]

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Ask Electrical Engineering Engineering

Difference between surface current and current density?

Actually my problem is with the direction of both. I use CST to simulate a patch antenna. I guess that current density is the classic vector field \$ \mathbf{J} \$ (A/m^2) and actually follows the direction of the E-field. In my case, the patch antenna is placed on the yz plane. The current density direction […]

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How does input ripple voltage effect my circuit operation

I am designing a DC-DC power supply with input of 12 V and expected output of 3.3V. I would like to know how does the input ripple voltage effect my functionality of the circuit. I also want to know the effect of overshoot current at the output and how does it effect my circuit. I […]