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I heard a saying sometime ago. "Perfect is the enemy of good". Striving to get the very very best can mean that the highly acceptable is constantly disregarded. All engineering and technology is a compromise between what is achievable, affordable, acceptable. Smartphones with their...

Your photography teacher presumably spent a long while on dark room techniques, developing, fixing enlarging masking applying filters. Mostly now irrelevant. Newer lenses made from plastics can be non spherical and autocorrect some of the distortions which these spherical lenses introduced. Of...

If phones had better lenses than pro or semi pro DSLRs then wedding photographer s would use them. They don't..... so arguement settled . It is in the consumer space that the competition is more fierce. The OP is comparing an 8 year old compact fixed lens camera with 10 megapixel sensor and...

The brakes are hydraulic so are plastic tubes, the chain may well be stainless steel ... It is silvery. If one got the 8 speed hub version there is three inches of exposed cable. The hub gears is the preferred version for coastal areas anyway A little grease The drive sprocket on the Bosch drive...

I live about 150m from the sea ,well when the tide is in, otherwise 1500m granted the wind is not as high here but we do get storm's and Easterly . The Motus is aluminium frame, brakes are a plastic material, wheels are either aluminium or stainless steel .Not much to rust... And I am not...

Getting something to lift up the steps is a bit of a killer... But if theft is not a problem , as you indicated in previous emails, why does it need to be indoors. I would suggest her looking at the Raleigh Motus with 26 inch wheels I would not suggest the larger 700 wheels. Bang on budget and...

Then according to some websites viewed, they are a lithium class battery, of a highly respected type and may not have BMS fitted because the cells are so well matched. Apparently the factory manufacturing these was wiped out during the japenese tsunami.

Of course all of these methods are approximations. Neither of us have taken into account the energy held in the wheels. Assuming that the wheels including tyres are 3kg each this is an additional 6kg (above the static mass included in the previous calculation) of rotational kinetic energy ...

Alternative method Mass of bike and person 100kg Final speed 25km/ HR or 6.25 m/s. V ( not sure exactly how you got this number my calculation for 25km/HR is 6.9m/s but to maintain comparison I have used it) Kinetic energy of bike 0.5mass x speed squared. 1952 joules Energy input 250...

The headline is technically correct and is what I would term truth intended to deceive. The key letter being s at the end of population s .. there are some 7 EU states with populations less than 3.5million including Malta. The intention was presumably to cause the casual reader to expect...

[ after all. Andy Hi Andy, I really appreciated the insight into Shetland living. The closest to such island living I have had. has been visits to the outer Hebrides and islands on the west coast of Ireland. No land of milk and honey perhaps but I suspect that there are numbers of...

It's still a relatively free world and if that is what makes you happy ok... However I am with d8veh on this one... A single device with better GPS , more recent map updates, ability to use both GPS satellites and triangulated measurements from cell towers A better camera , particularly on the...

If it is a smartphone you have without a SIM rather than a tablet, then the good news is that it should be capable of making emergency calls. A tablet is not a smartphone as it is missing the GSM radio electronics. The smartphones, indeed all 3g and later operate by linking up with cell...

Hi d8veh you probably knew it anyway but , the forward voltage drop on LEDs is only 1.8 V for red going up to nearly 3v for blue or 3.4v for UV types. The so called white LEDs are actually UV LEDs with phosphors, similar to those in flouresent tubes embedded in the plastic. The forward...

Zlantan I have never disrespected your views yet. There are a number of statements in this short post which do need to be clarified. 1. There is almost certainly a greater collective knowledge of the discipline of economics than is available within this forum. There is likewise a greater...

Welcome. There are as many opinions voiced here as contributors ( Well nearly). I will get my spoke in first this time. Central drive motors , where the motor drives a gear connected to the pedal crank provide the best and most authentic cycling experience. Because the motor works in...

D8veh is correct ... Do not touch the components currently on the PCB ... There are no spares there...... If you acquire a 3amp silicon diode with wire terminals you will not even need to solder anything. The standard screw connector strip as used by electricians and available in any...