Pin Definition and 156 Threads

I think this is the right place to put this. If not I apologize. Feel free to move. I am trying to solve the bend angle for a bar given specific dimensions. The bend angle is acute as in the bar traverses the pin for more than 90-degrees. The bend angle is the angle of the projected lines...

Dear Experts, I was looking at Venturi effect and a question popped into my mind. When I use a water hose and turn on the tap, the water rushes out of the hose. If there is a break along the hose, eg. a small puncture, some water would also leak through this hole am i right? At least this...

Does more rotation of the bowling ball result in faster pin? Here's my understanding, please check my physics. The ball has 2 forms of energy, kinetic due to its momentum and rotational due to its angular momentum. When it hit the pin, there're transfer of energy. The pin will pick up...

Hello and here is my problematic 1st post. I have a problem which i need help with, I'm an electrical engineer so my understanding on this subject is basic. I need to calculate the cooling effect of a AGR fuel pin and I'm not sure were to start. Here is some background on the question...

7 seg display NO CHIP pin?? hello wise ones. I've recently taken delivery of some 7 segment led displays for a small project, (i'm brand new at building electronic ccts) 3 of theese single digit displays will be driven from a microcontroller the 7 segment display units have a pin labelled...

Hi friends, simple question here. I have a system that needs to be earthed, currently I am connecting it to an earthing rod which I have outside, however it would be more convenient for me to have the system indoors. Would wiring the Earth connection to the Earth pin in a standard UK plug...

I get an electric shock whenever I connect my digital camera or camcorder to my TV. The shock occurs whenever I touch the camera. The TV plug has only 2 pins. So my first thought is to provide a ground return for the TV power. The shock hazard occurs only with the 2 pin plug equipments like...

Homework Statement Calculate the diameter of a meduim carbon steel pin in double shear subjected to a suddenly applied shearing force of 150000N? Homework Equations A=p/t p=300000 ( double shear) t=580 ( ultime shear strength) The Attempt at a Solution Double shear 150000...

Ca. 1996 a colleague bragged to me about an undergraduate lab he'd worked out where they did a high-precision measurement of g (I think he claimed 3 sig figs) using an index card, a pin, and a stopwatch. He didn't tell me any details. I've long since lost contact with him, but I was thinking...

A 3 pin frame ABCDE is supported at A and E. it supports vertical loads of 60 kN at B 80 kN at c and 100 kN at D as well as a horizontal UDL of 50kNm along DE. Calculate the reaction forces. I have REV = 124 kN and RAV = 116 kN. REH = 115.3kN and RAH = 215.3 kN. Are these correct Next...

Hi I am trying to solve this problem. I already got the answer but have some questions. A long uniform rod of length L and mass M is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a vertical position, as shown in Figure P10.61. At the...

Bowling physics... 10 pin bowling... I'm an avid bowler... and trying to figure out the reduction in force into the pins when using a 14lb ball as opposed to a 15 lb ball as opposed to a 16 lb ball. I am reasoning that a lighter ball has less impact power (as in getting hit with a 3 lb brick...

hii... you all know about IV Characteristic PIN diode.. I fabricate PIN diode and want to analysis my result.. what is the forward voltage drop for PIN diode? are the voltage fix o variable.. ??

Hii... I already fabricated PIN diode using boron (P), Si (N-type), and phosphorus (N). For the method, I etching two contact at Si wafer then doping the boron and phosphorus... there are width I-region (Si) between the contact. A already measured the I-V characteristic of PIN diode but...

Torque of a pin. Please Help! Homework Statement How much torque must the pin exert to keep the rod from rotating? (L=100.9 cm, M=3.98 kg, m=537 g.) I attached the picture of the problem. I am unsure how to approach the problem. I am looking through my College Physics and cannot find an...

Determine the reactions at the pin A and at the roller at B of the beam. I honestly have no idea how to do this problem. It gives the answers as... Ax = 192 N Ay = 180 N By = 642 N Please help.

Homework Statement The question is: The weightless beam, ABCD, shown in Figure below is supported by a pin support at B, and a roller bearing at C. There is a 4 kN/m UDL along the whole beam, as shown. There is an 11.2kNm clockwise couple at A. The vertical reactions of B and C...

i am designing a stepped attenuator using pin diode as a switch in microwave office. i am having difficulty in using pin diode as a switch. i knw it is operate in forward bias and open in reverse bias. if i am giving a rf signal between 300 Mhz to 3 Ghz then how can i switch it to reverse bias...

Hello all. I am give a pin jointed truss structure. (Look at attached jpeg image) I have a worked solution of: F2*4 + F1*3-Av*6=0 Av=1/6(3F1+4F2)=600kN Ch=F2=600kN Cv=Av-F1=200kN Member forces: S1=-5/4 Av = -750kN S2=-CH=-600kN S5=3/4 Av=450kN S3=-5/4 s4=250kN...

Hi, This is my first encouter with anything to do with RF design. I'm trying to design an RF PIN diode switch to meet certain specifications. I'm having considerable difficulty putting together a circuit schematic that will accomplish this. My specs are: Center frequency: 15GHz Bandwidth...

Hello, I need help calculating the (Initial and sustained) Force required to pull a round pin that is under load. I have attached a dim diagram showing the system. Please assume no friction since I haven't selected the materials. Also if you could help me calculate the Sheer force (again...

Homework Statement We are supposed to compute the force supported by pin at A for the slip joint pliers. The book says they are under a 30# grip. I summed forces about A to find B, then broke B up into components by dividing by \sqrt{2} and then I summed forces for Ax and Ay and found A...

Hi all, been here several times and found good help for several questions, but this time I'm out of luck, so here I go. Homework Statement By taking a section through the pin-jointed frame as shown, and considering the quilibrium of the structure to either the left or right of the section...

Hi everyone, What is the area should be taken to determine the compression stress of pin-hole in tention force (i.e plate with known thickness having a hole for lifting shakle pin) where the hole diameter is greater than the pin diameter (> x3) (theoretically, it is not an area just line of...

Homework Statement See figure. Homework Equations \sum F_{x} = 0 \sum F_{y} = 0 \sum M = 0 The Attempt at a Solution See figure (written in my writing). Are the tensions A and B suppose to be the same? I imagine not because they are at different angles so they have...

Hello All, I have been working on this problem for a few hours now and it's really beginning to bug me. I did a search on Google for methods of monitoring multiple push-buttons (tact switches in my case) using a single analog IO pin from a microcontroller. So far, I have come across a few...

A thin rod of uniform mass M and length L is attached to a string at one end to the ceiling and a pin at the other end to the wall. The rope (connecting the ceiling and the horizontal rod) is cut at t = 0 s. 1) What is the force of the pin at t = 0 seconds? 2) When the rod swings...

I was looking at my laptop power plug - one has a 3 pin and the other is 2 pin. The power coming into the laptop has only 2 connections - GND and +DC If I remember rectifiers, we only used the AC mains to convert AC to DC, not the earth. I am wondering, where is the the Earth pin connected...

Homework Statement To gain access to his account, a customer using an automatic teller machine (ATM) must enter a four digit code. If repetition of the same four digit is not allowed (for example, 1111), how many possible combinations are there? The Attempt at a Solution I figured two...

I'm trying to design a fiber optic sensor to sense vibration via intensity modulation. I'm new in this field and i don't know whether I can use a PIN photodetector for low frequency or not... what's the bandwidth of a PIN Photodetector? Does it mean its responsivity is limited in low frequency...

Hey Guys, So I was scrapping parts from an ancient present I found up in the attic called the "Singing Machine". Point is I managed to retrieve a dual 7 segment display. The only documentation I can find online is for 14 pin versions of these things. Strangely this only has 10 pins and I can...

I am trying to replace some pieces in a circuit that produces police siren sounds and can't find new ones. one i believe is a transistor with the numbers 7536a-1 and an 8 pin IC with no numbers on it. Can someone please help me identify these. I am new to electronics and not real familiar...

Homework Statement A guide with a vertical slot is given a horizontal motion of x=200cos(0.3t), where x is in mm, t is in seconds and (0.3t) in radians. The guide controls the motion of pin P, which is also constrained to move along a fixed parabolic slot as shown below. The parabolic slot has...

Homework Statement I'm trying to determine the friction of a pin joint that will be loaded differently depending on the position of the linkage. Homework Equations I know the equation for frictional force is F="mu"*N, where "mu" is either the coefficient of static or kinetic friction...

Homework Statement The beam is supported by a pin at A and a short link BC, as shown in Figure 3.0. Determine the maximum magnitude P of the loads the beam will support if the average shear stress in each pin is not to exceed 80 MPa. The diameter for each of the pins is 18 mm. The Attempt...

Hi. I use an LM317 in constant current mode to vary the current from ~20ma to ~400ma, the voltage use is about 3 to 5. I just don't like that there's a 3 volt drop out for the 317 design. I'm wondering if anyone knows of any pin compatible replacements with a lower drop out? I wouldn't mind...

Homework Statement Basically, I am looking to find the reaction forces at the pin joint on the right side of the structure. I just realized it is not labeled on my diagram, but it is the pin on the link opposite of E. Where the 13 degree angle is measured from. Homework Equations I have...

Homework Statement How much torque must the pin exert to keep the rod from rotating? (L=1.011m , M=3kg , m = .301kg) So I am guessing the point of rotation is the pin?? But then how does the pin exert any torque if it is at the point of rotation? I'm not quite sure there is a...

Homework Statement (a). Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b). Imagine adding electrons to the pin until the negative charge has the very large value of...

Why is Earth pin longer than other two in a plug top?

Homework Statement A framework of pin jointed members has to be designed to support a plug introduced into the reservoir wall to prevent leakage and further progression of a crack along the wall. The plug is cylindrical, has a diameter of 0.35 m and is supported by a single pin joint. The...

Hi guys, I'm trying to find a reliable formula for calculating the depletion depth in a PIN diode at a given voltage and knowing the doping of the layers. Does anyone have one? Formulae for the PN diode are common, but don't apply to the PIN directly as far as I can see. I found a formula...

Hey Guys, I've got a pretty simple (I think) pin joint frame question. I am pretty weak in this area of mechanics so if someone could advise me on how to go about doing this question i would really appreciate it. The Figure Q1 (The Attatchment) shows a pin jointed frame. The frame is...

Hi There Please Anybody Than Can Help I Am Upgrading Computer Running Into Problem Mobo Msik9n Sli V2 Cpu Amd Athlon 64x2 4600 In The Procces I Found That I Need A 12 V 4 Pin Square Power Cord Which I Dont Have From My Psu However In The Mobo Istallation Manual It Says I Must Power The...

Where can i find a 68 pin lcc socket with a hole for mounting a sample. I need to be able to place the sample on a coldplate in a dewar which so that it is in contact with the plate and still contacts the pins on the socket. The attached file shows a rough ProE model of the coldplate. As you...

I'm using a ATMEGA16 microcontroller. I was having problem getting it to work. I found somewhere on the internet that even if I'm not using the analog signals, I need to short the AVcc pin to the Vcc. Can anyone give any reason as to why we need to do this?

Could anyone please provide me with a labeled pin diagram of an 8:1 Mux or list it on here? I have tried searching and haven't had much luck. Thanks for your help.

I have a general question about solving these types of problems. I had two different problems for calculating the tensions and compressions of a pin-jointed truss. both problems were of a trapezoidal shape with 5 pins in total. in one problem, a weight was applied to the center truss on...

Hello everyone, I am new here and so I apologize in advance for the many forum faux pas I am likely to commit. I am not particularly well educated in the field of physics, but I am a piano tuner by trade, and we work with issues every day that are basically problems of physics and engineering...

Please click on the image to make it bigger. http://img105.imageshack.us/img105/5413/pinconnectiontw4.th.jpg At pin connnection G shouldn't there be two support reactions just like the pin connection at A? If the solution in the diagram is correct why is it correct?