Tagged Questions

0
votes
1answer
579 views

How to calculate voltage drop over and power loss in wires

How do I calculate the voltage drop over wires given a supply voltage and a current? How do I anticipate on voltage drop so that the final load has the correct supply voltage? What will be the power ...
2
votes
2answers
169 views

I2C Capacitance

I'm using an I2C interface for my e-compass and controller. The capacitance of the e-compass I2C pin is 20pF, and that of the I2C controller is approximately 40pF. But the problem is: I want to use a ...
7
votes
3answers
274 views

Crimping tool basics

When I design a printed circuit board, I often put 100mil male header anywhere. Sometimes I think it would be better to place some connectors for more reliability. Anyone here knows which ...
4
votes
1answer
233 views

Difficulties of I2C over wire

I want to link a PIC16F1825 and a TCN75 temperature sensor via I2C. The temperature sensor is about 1m from the MCU. Can somebody enlighten me on whether and what kind of difficulties I am going to ...
2
votes
2answers
1k views

Which is the best, clean way to join wire together

I am installing CCTV cameras and I'm using a 3A adapter to supply power to the cameras, but I have very messy results when trying to join together very small wires with electrical tape. Is there any ...
0
votes
1answer
109 views

Using Ethernet wires for DIO

I have multiple devices that need a DIO connection with 8 wires back to a central device. Would using an Ethernet cable for this purpose be reliable, or would using something like DB9 connectors be ...
0
votes
1answer
79 views

Welding Cable for Power Bus

I am considering using 2AWG welding cable from MC Master as the main power lines in a solar car. From everything that I could tell the specs are better than standard cable or battery cable, it is ...
-1
votes
1answer
124 views

13+ wire DB-25 or DB-15 cable

I can't find an answer to this anywhere so I thought I'd ask around here. I need a cable with 13 or more wires in it, preferably with a DB-15 or DB-25 connector, but I can't find one anywhere. I ...
2
votes
3answers
818 views

Questions about wires in a DB9 cable

I stripped a DB9 extension cable which I will use to connect to a DB9 connector on one end and an RJ45 on another. I need to make connections to pin 2, 3, and 5 on the DB9 side. When I stripped the ...