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david7

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david7

Mod Counter

Hello Does anyone know how you would design a MOD 21 binary counter using j-k flip flops and how many flip flops would be required? Any advice/help would be appreciated. David...
18:26 Sun 17th Mar 20132 answers, last by david7 21:12 Sun 17th Mar 2013
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david7

Calculus

Hello Can someone please help with my final maths question, It is Intergration and am struggling. A current i=25sin 100Pi mA flows in an electrical circuit. Determine using intergral calculate, its...
15:38 Tue 03rd Jul 20124 answers, last by HowardKennitby 21:05 Tue 03rd Jul 2012
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david7

Parilla/Jica 100cc kart engine

Hello Not sure if this is the right area on this site to ask this question, I have a Jica 100cc kart engine and it has no spark does anyone know where I can get the what looks like a coil pack or of...
15:49 Wed 25th Apr 20122 answers, last by david7 21:40 Wed 25th Apr 2012
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david7

Solving Partial Fractions

Hello Can someone help me please I am really struggling with partial fractions I have 2 questions to complete and would appreciate some help, my questions are: x2-3x+6/x(x-2)(x-1) and x2+9x+8/x2+x-6 I...
21:59 Sun 22nd Apr 201221 answers, last by factor30 18:59 Tue 01st May 2012
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david7

Can anyone help with transformer calculation please

stuck on last question ;-( A transformer delivers a power of 5Kw when on load, what will be its efficiency if the copper loss is then 100w and the iron loss is 75w. Thanks in advance David...
12:32 Sun 18th Mar 20127 answers, last by david7 11:12 Thu 22nd Mar 2012
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david7

Potentiometer getting too hot to touch

Hello Not sure if this is the right section to ask this question, but I have fitted a 10k potentiometer to a tension system ( dancing arm arrangment) which is driven by a 24v motor, after a short...
20:14 Thu 31st Mar 20115 answers, last by Merlin3189 14:30 Tue 26th Apr 2011
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david7

Honda GX200

Does anybody know how to Modify/Tune a Honda GX200 engine? I have one on my go kart and would like more power from it. I was considering putting a 125cc bike engine on but don't want gears. ;-)
10:25 Thu 16th Jul 20093 answers, last by ChuckFickens 23:48 Thu 16th Jul 2009
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david7

Gas supplier

Does anybody know how long an energy supplier can legally leave a meter reading? EON the company I am with have told me they hav'nt had a meter reading since 2004 and have sent me a bill for ?3206...
17:31 Tue 03rd Mar 20098 answers, last by bednobs 20:10 Thu 05th Mar 2009
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sandy beach

monitor just verticle lines showing

i was working on my compurt ( vista..and all of a sudden everything just disappeared and just verticle coloured lines appeared checked everything...couldnt switch computer off had to remove the power...
18:39 Fri 14th Nov 20082 answers, last by david7 11:35 Tue 25th Nov 2008
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mountainboo

Is the Earth going to Align with the Sun in 2012?

I have heard many theories about 'End of Days' in 2012. Some are utterly implausible but this one seems to me to be something that could possibly happen. I have read that the Earth will align with the...
10:31 Fri 31st Oct 200816 answers, last by mancman1 16:28 Sat 10th Mar 2012
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theleeroy55

electrician training

I am training to be an electrician. Does anyone out there recommend any books to buy that could be helpful ? cheers
17:59 Sun 02nd Nov 20083 answers, last by david7 00:04 Thu 13th Nov 2008
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david7

timer to make a light flash

I am a electrical technician and do not have alot of experience with on delay timers. What I am trying to achieve is: At work we have a production room and a packing room and they want a strobe light...
20:56 Sun 19th Oct 20083 answers, last by david7 23:13 Wed 22nd Oct 2008
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david7

Toaster thats rated at 100v but needs to be 240v

A friend of mine bought a VW Camper van toaster from japan, it was fitted with a 2 prong plug (euro) she plugged it in and the circuit board/micro chip has burnt out. Does anyone know how to convert a...
16:48 Tue 06th May 20085 answers, last by buildersmate 20:14 Tue 06th May 2008
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david7

Diversity

When installing a consumer unit, would you take diversity into account. Say you had a 100A isolator and 2 ring mains 32A each 2 lighting circuits 6A each a Shower 40A and a cooker 40A. Any clues on...
19:33 Mon 19th Feb 20073 answers, last by Disco Fever 18:52 Thu 22nd Feb 2007
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david7

Fluke 111 Multimeter

I have a Fluke 111 Multimeter. When I switch on to test for AC voltage I automatically get a fluctuating reading. I would expect it to read zero when not actually testing. Also the reading increases...
21:29 Sat 12th Aug 20068 answers, last by Disco Fever 20:02 Tue 15th Aug 2006
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Mickmickmick

no hot water from combi system

no hot water from combi system. central heating is ok. mostly no hot water hot water very hot when it works.
13:54 Wed 11th May 20057 answers, last by bjshipway 11:32 Wed 25th May 2005
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AllYourBase

Washing machine minor repairs

A bone or wire from my partners bra has come loose in the washing machine and is somewhere in the workings, making a slight grating noise as the unit operates. I know how expensive repair men can be,...
07:42 Fri 13th May 20054 answers, last by thikasabrik 16:11 Sun 15th May 2005
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Lindylour

No wet wonder foam

I have seen the 'No Wet Wonder Foam on shopping channel, has anyone brought it and what do they think of it.  Is it as good as it looks? The things we look at when off work sick!!!!
12:31 Wed 09th Mar 20054 answers, last by david7 21:18 Fri 01st Apr 2005

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