Questions tagged [network-interface]

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19
votes
5answers
75k views

Difference between Hz and bps

Does Hz and bps mean same? Can a signal be transferred at rate of say Mbps on a channel bandwidth of few Khz?
6
votes
1answer
271 views

What ultimately determines the speed of electrical media

I have heard several myths about this. Some have said "thicker wires mean faster speed" which I don't believe. Others have said different voltages and others have said higher frequencies. Take Coax ...
1
vote
1answer
547 views

A TVS for lightning surge protection

A camera will be mounted outside and powered via POE to Aruba 2540 network switch. I don't want indirect lightning surge to travel into the network switch. I don't care if the camera gets destroyed. ...
0
votes
1answer
2k views

Problem connecting UART Wifi Module to PC

As refereed to my old question ( Connect UART WiFi module to PC ) which has been solved that days, I have a UART Wifi module ( this one ) and unfortunately I have problem again ! The point is, this ...
20
votes
8answers
13k views

Cheapest way to add wifi to a project [duplicate]

I need low power wifi for a not-very-data-intensive application. What modules or chipsets should I look at? Other than low cost and low power, I have no restrictions. The cheaper the better. This ...
5
votes
1answer
4k views

How to design PoE splitter for Mode A and B

I would like to power my device via PoE, but I do not know which mode (A or B) is provided by the 802.3af power sourcing equipment (PSE). How should I design a splitter to accept both implementations: ...
3
votes
2answers
5k views

Connect UART WiFi module to PC

I recently bought a UART WiFi module (this one) and configured it (wireless configuration method) with right SSID but wrong password (and I don't know what it is). The problem is that I can't reset ...
3
votes
4answers
5k views

Smaller alternative to RJ45 Ethernet connector

I am trying to minimize space usage for an enclosure that holds 48 boards with a RJ45 connector for Ethernet communication on each board. The boards work well with 10BASE-T (2 pairs) connection to a ...
0
votes
0answers
544 views

Ethernet Interface PCB layout requirement (if any)

I am doing Ethernet communication to/from an MCU. I got it working great with an ENC28J60 development module: https://www.digikey.com/product-detail/en/olimex-ltd/ENC28J60-H/1188-1044-ND/3471433 I ...