diagram ingram

Wednesday, May 29, 2013

USB Keyboard Made from Old Typewriter

Looking for a unique gift? Here’s an antique typewriter which has been modified to function as a USB Keyboard for PC, Mac, or even iPad. That’s very cool, isn’t it?

In the world of obsolescence, this USB typewriter is a groundbreaking innovation. It does not change the outward appearance of the typewriter and is easy to install since there is no messy wiring. The 3 components of the USB typewriter are the Sensor board, the USB switches, and the Reed Switches.

It works like a regular typewriter with all letters, numerals, and punctuation marks as well as shift, space, and return carriage. It’s a better addition to your home office.

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Monday, May 27, 2013

Painless Wiring 30120 Universal Turn Signal Switches Turn

Painless Wiring on Painless Performance Products 60009 Painless Fuel Injection Wiring

Painless Performance Products 60009 Painless Fuel Injection Wiring.

Painless Wiring on Painless Performance Wiring Harness Install Project Get Shorty Wired

Painless Wiring on Painless Performance Wiring Harness Install Project Get Shorty Wired

Painless Performance Wiring Harness Install Project Get Shorty Wired.

Painless Wiring on Home Ignition Painless Wiring Harnesses Manufacturer Painless

Painless Wiring on Home Ignition Painless Wiring Harnesses Manufacturer Painless

Home Ignition Painless Wiring Harnesses Manufacturer Painless.

Painless Wiring on Painless Wiring 10127 Painless Performance 12 Circuit Mopar

Painless Wiring on Painless Wiring 10127 Painless Performance 12 Circuit Mopar

Painless Wiring 10127 Painless Performance 12 Circuit Mopar.

Painless Wiring on Painless Wiring Fuel Injection Harness

Painless Wiring Fuel Injection Harness.

Painless Wiring on Painless 12 Circuit Wiring Harness For Pick Up Trucks Using Gm Chevy

Painless 12 Circuit Wiring Harness For Pick Up Trucks Using Gm Chevy.

Painless Wiring on Painless Wiring 30120 Universal Turn Signal Kit Inc Switches Turn

Painless Wiring on Painless Wiring 30120 Universal Turn Signal Kit Inc Switches Turn

Painless Wiring 30120 Universal Turn Signal Kit Inc Switches Turn.

Painless Wiring on Painless Wiring Harness P N 60217 60218 1999 To 2002 Gm Vortec Fuel

Painless Wiring on Painless Wiring Harness P N 60217 60218 1999 To 2002 Gm Vortec Fuel

Painless Wiring Harness P N 60217 60218 1999 To 2002 Gm Vortec Fuel.

Painless Wiring on Painless Wiring

Painless Wiring.

Painless Wiring on Chassis Wiring Harnesses Painless 14 Circuit Wiring Harness Micro

Chassis Wiring Harnesses Painless 14 Circuit Wiring Harness Micro.

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Sunday, May 26, 2013

9V 2A power supply circuit diagram

Lots of members asked about 9V dc power supply with 2A.So here We have introduce a new circuit diagram.This circuit can provide 9V 2A.I suppose now you all have some what good power supply with some what good amp level.This circuit operates with famous IC 7809.If I say simply this is a amp booster circuit.

Note
# Build this circuit on a PCB to get maximum result
# If you can attach a heat sink to the IC It will get a long life

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Building Electrical Design Order

a. Select voltage, phase
b. Do lighting calculation and layout lighting
c. Do heating calculations and select equipment
d. Lay out outlets
e. Circuit any special equipment
f. Fill out load calculation sheets and size panel
g. Make up panel directory
h. Balance panel
i. Size feeders to panel (just like branch circuits. 80% loaded wire same size or larger than ampacity of main breaker. 6/14/02 Chapter 3: NEC CODE Rules and Design Practice 7/13
j. Size grounding conductors
k. Fire alarm circuits must be tapped ahead of main breaker with a separate panel.
l. Do short circuit calculations,

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Sunday, May 19, 2013

Armature Windings

Armature Windings :Drum-type armatures are wound with either of two types of windings - the Lap Winding or the Wave Winding. The difference beween the two is merely due to the different arrangement of the end connections at the front or commutator end of armature.Each winding can be arranged progressively or retrogressively and connected in simplex,duplex and triplex.The following rules,however,apply to both types of the windings:

(i)The front and back pitch are each approximately equal to the pole-pitch i.e windings should be full-pitched.This results in increased e.m.f round the coils.For special purposes,fractional-pitched windings are deliberately used.
(ii)Both pitches should be odd, otherwise it would be difficult to place the coils properly on the armature.For example if YB and YF were both even,then all the coil sides and conductors would lie either in the upper half of slots or in the lower half.Hence, it would become impossible for one side of the coil to lie in the upper half of one slot and the other side of the same coil to lie in the lower half of some other slot.
(iii) The number of commutator segments is equa to the number of slots or coils because the front ends of conductors are joined to the segments in pairs.
(iv) The winding must close upon itself i.e if we start from agiven point and move from one coil to another,then all conuctors should be traversed and we should reach the same point again without a break or discontinuty in betwen.

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Friday, May 17, 2013

40 m Band Direct Conversion Receiver

Building a applied and accessible absolute about-face receiver for the 40 m CW bandage is not as simple as it ability appear. Broadcast base signals from the adjoining 41 m band, will calmly afflict best absolute about-face mixer designs with their exceptionable (and absolutely nearby) S9 +40 dB signals. My band-aid incorporates a diode-ring mixer and a attenuated bandage rf ascribe filter. These choices aftereffect in empiric all-embracing receiver activating ambit than that accomplished back application an IC mixer bore (such as a NE612). Comfortable and undisturbed operation in the black was accessible back activated application my Windom antenna. Some of this projects objectives included:

High dynamic range diode-ring mixer
Stable oscillator with a 30 kHz tuning range
Tuning range from 7005 kHz to 7035 kHz
Narrow front end band pass input filter
Broadband 50 Ohm termination
Audio selectivity used in the AF amplifier
Symmetrical (differential coupling) design
Low battery / power supply current consumption
60 Ohm headphone output impedance

You may admit abounding of the date circuits - as they are agnate to those acclimated in some of my added projects. The VFO and the RF ascribe bandage canyon clarify are anniversary advised about bowl resonators. These are acceptable difficult to locate. [See the agenda below.] I accept acclimated a HPF505 blazon arena diode mixer - but added mixers such as the IE500 or SRA1 should be suitable. The diode arena mixer achievement drives a alongside adjustment consisting of R11 and the cogwheel ascribe impedances of IC1. This after-effects in a added abiding 50-Ohm broadband abortion for the mixer achievement (by adverse to that accessible on a archetypal RCL based diplexer).

The accretion of the broadband amplifier afterward the mixer, IC1, is set by the best of R10. A 40 dB accretion is accomplished by application 100-Ohm resistor at R10. Any IC1 rf achievement signals are shunted to arena - abrogation alone an audio arresting to be activated to the afterward stage. IC2 is an operational amplifier that is acclimated to amplify the actual audio signals by yet an added 46 dB. Passive audio clarify apparatus are acclimated at the ascribe of IC2 so that alone signals at or abreast 750 Hz are amplified. The all-embracing accretion and achievement akin is about too abundant for adequate headphone listening. An rf attenuator (P1 amid abreast the antenna ascribe terminal) is acclimated as a agency of authoritative the receiver achievement volume

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Tuesday, May 14, 2013

Electricity systems can cope with large scale wind power

Research by TU Delft proves that Dutch power stations are able to cope at any time in the future with variations in demand for electricity and supply of wind power, as long as use is made of up-to-date wind forecasts. PhD candidate Bart Ummels also demonstrates that there is no need for energy storage facilities. Ummels will receive his PhD on this topic on Thursday 26 February. Wind is variable and can only partially be predicted. The large-scale use of wind power in the electricity system is therefore tricky. PhD candidate Bart Ummels MSc. investigated the consequences of using a substantial amount of wind power within the Dutch electricity system. He used simulation models, such as those developed by Dutch transmission system operator TenneT, to pinpoint potential problems (and solutions).
His results indicate that wind power requires greater flexibility from existing power stations. Sometimes larger reserves are needed, but more frequently power stations will have to decrease production in order to make room for wind-generated power. It is therefore essential to continually recalculate the commitment of power stations using the latest wind forecasts. This reduces potential forecast errors and enables wind power to be integrated more efficiently.
Ummels looked at wind power up to 12 GW, 8 GW of which at sea, which is enough to meet about one third of the Netherlands demand for electricity. Dutch power stations are able to cope at any time in the future with variations in demand for electricity and supply of wind power, as long as use is made of up-to-date, improved wind forecasts. It is TenneTs task to integrate large-scale wind power into the electricity grid. Lex Hartman, TenneTs Director of Corporate Development: "in a joint effort, TU Delft and TenneT further developed the simulation model that can be used to study the integration of large-scale wind power. The results show that in the Netherlands we can integrate between 4 GW and 10 GW into the grid without needing any additional measures.
Surpluses
Ummels: Instead of the common question What do we do when the wind isnt blowing?, the more relevant question is Where do we put all the electricity if it is very windy at night?. This is because, for instance, a coal-fired power station cannot simply be turned off. One solution is provided by the international trade in electricity, because other countries often can use the surplus. Moreover, a broadening of the opening hours of the international electricity market benefits wind power. At the moment, utilities determine one day ahead how much electricity they intend to purchase or sell abroad. Wind power can be better used if the time difference between the trade and the wind forecast is smaller.
No energy storage
Ummels research also demonstrates that energy storage is not required. The results indicate that the international electricity market is a promising and cheaper solution for the use of wind power.
Making power stations more flexible is also better than storage. The use of heating boilers, for instance, means that combined heat and power plants operate more flexibly, which can consequently free up capacity for wind power at night.

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