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For cycling enthusiast Tom Donhou, there has only ever been one mission. To ride as fast as he possibly can on two wheels. In a bid to prove what can be achieved through backyard engineering, he has custom-built a bike which reached speeds of up to 80mph. A London-based bicycle frame builder by trade, Donhou invented a 104-tooth chainring to achieve the goal. And in another tribute to British engineering, he wanted to use a car to block the wind to reduce wind traction. The current land speed record for a bike (not bycycle) is 167mph which was set by Fred Rompelberg using a dragster in the Salt Flats.[via]

Simple Remote on-off Switch Circuit Diagram . This circuit provides power control without running line-voltage switch leads. The primary of a 6-volt filament transformer is connected between the gate and one of the main terminals of a triac.   Simple Remote on-off Switch Circuit Diagram The secondary is connected to the remote switch through ordinary low-voltage line. With switch open, transformer blocks gate current, prevents the triac from firing and applying power to the equipment. Closingthe switch short-circuits the secondary, causing the transformer to saturate and trigger the triac. Sourced By circuitsstream

  Whereas it's traveled 11.6 billion miles to interstellar space, Voyager 1's software isn't as high-tech as you may believe. In detail, it has less than 40 KB of recollection. To put that in viewpoint, your 16 GB iPhone 5 has about 240,000 times the recollection of a Voyager spacecraft. NASA developed Voyager in the 1970s in a pre-computer era when scientists had to rely solely on pencil, paper, chalkboards and their own mathematical abilities. While that appears unimaginable in a time when we contain decades' worth of computational power in our pouches, Voyager 1 is one of NASA's most thriving missions, and project researcher Edward Stone states he wouldn't have changed a thing. "It's astonishing it's continued as long as it has," pebble notifies Mashable. "I don't know how we could have done things much better than they were finished. I mean things do wear out, and we've had to swap to some of our backup schemes, but luckily we ...

This design is inspired by the Minty Boost but it fixes some of the issues that I had with it. The Minty Boost is limited to 600mA due to the LT1302 chip. The Super Boost uses the LM2700 which can push up to 3.6A. This will enable i-devices to draw up to there maximum of 1A which will enable a faster recharge. [ ]

Power amplifiers that we sometimes raises a raft of small drone as groundingless than perfect.The following are some ways to cope with the hum of the power amplifier:  1. Keep sensitive circuits of the transformer, casing dimensions are not too small.One blog even suggested to use two-bok, bok special one for the transformer. For the toroid transformer or amplifier with a large transformer, should only contain a series of power amps, with no tone control.  2. Change the position of the transformer, side by side into the lower side (the transformer is high) withfacing a series of sensitive posts  3. Use a spacer on each PCB board as high as half the height of the transformer, eg as high as 2.5 cm or more so that the PCB board parallel to the core / center of the transformer, here the effect of the weakest fields.  4. We recommend using a stereo module instead of two mono modulesThis avoids wiring errors. If forced to, try to sizecable between the right and left m...

This circuit employs the popular and easy to find LM3914 IC. This kind of IC is quite very simple to drive, requires no voltage regulators (it features a built in voltage regulator) and can be powered from almost every resource. This LM3914 IC based on Simple Battery Tester is very simple to explain: Once the test switch is pushed, the Car battery voltage is supply into a high impedance voltage divider. His function is to divide 12V to 1, 25V (or lower values to reduced values). This solution is much better than enabling the internal voltage regulator set the 12V sample voltage to be feed into the internal voltage divider simply because it cannot regulate 12V if the voltage falls lower (linear regulators only step down). Simply wiring with no change, the regulator provides secure 1, 25V which can be fed into the precision internal resistor cascade to create sample voltages to the internal comparators. In any case the default establishing let you to determine voltages between 8 and 12V...

The simplest example SMPS which still uses 3 transistors (C3807, A1015 and power transistors) classic problem that often occurs is: - Problem in the feedback circuit can cause the output voltage B + over so that it can endanger the aircraft as a whole. For example elco erupted, pcb burnt burnt by over-heated, horizontal transistor short. - Problem on feedback circuits may cause power regulator transistor is damaged due to over current transistor (eg, due to the 47k resistor transistor circuit on the secondary error detector value is delayed). - If the input ac voltage drops can cause the power regulator transistor is damaged, due to over current transistor If the secondary there is a power transistor short can cause damage over current regulator. - Protectors are designed to make the SMPS SMPS "reliable will not be damaged" if there are things that go wrong as mentioned above.  SMPS Circuit SMPS circuit using IC systems generally are designed with a surge protector, which inc...

Keil Microvision is an Integrated Development Enviornment (IDE) tool developed for students, embedded system designers and developers to make their programming easier. The keil combines project management, source code editing, program debugging and simulation of a program in one platform. Here i am going to demonstrate you on How to Debug or Simulate a program on Keil uvision software. I recommend you to read my previous post about How to Program a Microcontroller? [Basic Steps] . In order to simulate a program on keil microvision software (or any) you should have an Error and Warning Free source program. Here i am demonstrating you the simulation of a sample Led Blinking Program . Read More.....