Engineering - March 2007

I want to use a car jack as a tipping mechanism for a wheel barrow. A basic electric carjack can handle a loading capacity of 1000kg(motor 12V,max current 10A). My problem is how do i provide a power source which can handle a load of 100kg rather than 1000kg. Is it just plain simple that i provide 1/10 of the current max current.

2007-03-01 03:40:52 · 3 answers · asked by eddy1234 1

I'm playing with an ATMega128 microcontroller and am somewhat confused how one would connect this controller to a component that requires a clock signal? For example, at the moment I'm trying to build a smart card reader. The transmit/receive data pins from the smartcard interface I can simply connect to the i/o ports of the microcontroller board. The smartcard requires a clock signal and I was originally hoping to simulate one using a pulsing i/o signal from the ATmega, however someone else advised me they had tried and not found success. Instead, using a crystal was recommended. My electronics knowledge is a little thin -- I can visualize how one would connect a clock to the smartcard reader interface if it was standalone, but it seems like the clock would also need to communicate with the microcontroller somehow? The microcontroller is running off it's own crystal at the moment. Any help/advice is appreciated. Thanks :)

2007-03-01 03:39:37 · 4 answers · asked by mdigitale 7

2007-03-01 03:33:26 · 3 answers · asked by sshashis 1

2007-03-01 03:31:22 · 2 answers · asked by sshashis 1

2007-03-01 03:28:40 · 2 answers · asked by sshashis 1

2007-03-01 03:27:40 · 1 answers · asked by mechelle 3

2007-03-01 03:26:56 · 3 answers · asked by sshashis 1

i have a project to do, and if someone could give me some websites that could help me, or help me out, that would be great. The project is o make a "sales pitch" to convince consumers to but a vehicle, powered by an alternative fuel. Please help thx

2007-03-01 03:05:11 · 4 answers · asked by princess_cutie_pie1 1

2007-03-01 02:57:16 · 1 answers · asked by troy_bramblett 1

Can you please share some information about this.

2007-03-01 02:52:50 · 2 answers · asked by Anonymous

2007-03-01 02:31:07 · 6 answers · asked by anandhi n 1

2007-03-01 02:18:22 · 3 answers · asked by macgyver 1

The hot water in our office is very hot, and has a sign saying "Cautio: Hot Water". Why is this? Can't they just turn the temperature down?

2007-03-01 02:13:18 · 7 answers · asked by swinkate 1

Hi, i need help coming up with fun ways to explain compression and compressive force to middle schoolers!! And just engineering in general as well!!

Any ideas?!

2007-03-01 02:07:00 · 2 answers · asked by abe_cooldude 1

2007-03-01 01:35:47 · 5 answers · asked by nipsy3 2

2007-03-01 01:05:53 · 4 answers · asked by ward 1

2007-03-01 00:56:54 · 2 answers · asked by ward 1

this current sink is comming under the analog integrated circuits. i need a equations for the circuit also.

2007-03-01 00:44:45 · 2 answers · asked by kongu 1

2007-03-01 00:03:48 · 5 answers · asked by ward 1