Saturday, January 11, 2014
Simple Power Switching Circuit Diagram

Friday, January 10, 2014
Temperature Sensor Circuit Diagram
Temperature Sensor Circuit Diagram

Thursday, January 9, 2014
Super linear FM Circuit Diagram
Superlinear FM Circuit Diagram

Wednesday, December 25, 2013
Sub Woofer and Controller Circuit Diagram
all of sub woofers use a immense speaker driver in a immense box, with tuning vents & all the difficulties (& vagaries) that conventional operation entails. By conventional, I mean that the speaker & cabinet are operated as a resonant technique, using the Thistle-Small parameters to get a box which will (if everything works as it ought to) provide excellent performance.

The check methods I used are applicable to any combination, but in general I recommend either a single giant driver or a pair of (say) 300mm units. The next hurdle is the amplifier needed to drive the speaker. This is not trivial. If the selected driver has a sensitivity of 93dB / W @ one metre, then you can safely assume that the efficiency will be less than this below resonance, by a factor of possibly 6dB or more. In case you are used to driving a sub with 100W, this means that you have increased the power to 400W - although this is an over-simplification.
If they are to operate the sub from 60Hz (my aim from the outset), they will increase the power by 12dB for each octave, so if 20W is necessary at 60Hz, then at 30Hz this has increased to 320W, & at 15Hz, you will require over 5kW.
Fortunately, the reality is a tiny different, & 400W or so will be over sufficient for a powerful process, due chiefly to the fact that the energy content in the low bass region is not normally all that great. (Although some program material may have high energy content, in general this is not the case). The EAS process augments the existing process, which is allowed to roll off naturally - contrast this with the normal case, where a crossover is used to separate the low bass from the main process, so existing speaker capability is lost.
The controller is (actually very) simple, & the circuit is shown in Figure one. An input buffer ensures that the input impedance of the source does not affect the integrator performance, & allows summing of left & right channels without any crosstalk. The output provides a phase reversal switch, so that the sub can be properly phased to the remainder of the process. If the mid-bass disappears as you advance the level control, then the phase is wrong, so switch to the opposite position.
The integrators (U1B & U2A) include shelving resistors (R6 & R9), & the capacitor / resistor networks (C1-R4, C3-R7) be positive that signals below 20Hz are attenuated. In case you dont require to go that low, then the worth of the caps (or the resistors R4 & R7) can be reduced. I used four.7uF caps, & these are non-polarized electrolytic - a high value was needed to keep the impedance low to the integrators. I originally included the dual pot (VR1) to permit the upper frequency roll off to be set - however it does no such thing (as described above). The final output level is set with VR2, which may be left out if your power amp has a level control.
The unity gain range (using a 20k pot as shown) is from 53Hz to 159Hz. This ought to be sufficient for most systems, but if desired, the resistors (R5 & R8) can be increased in value to 22k, or you can select a bigger value pot. Using 22k resistors & the 20k pot will give a range from 36Hz to 72Hz.
The input must be a standard full range (or for a stampeded method, the whole low frequency signal). Do not use a crossover or other filter before the EAS controller. For final modification, and to integrate the method in to your listening room, I recommend the constant-Q equalizer. The final result using this is extraordinarily nice - I have flat in-room response to 20Hz!
The EAS method is surprisingly simple to set up with no instrumentation. Of coursework in case you have an SPL meter & oscillator you can also confirm the settings with measurements. Keep in mind that the room acoustics will play havoc with the results, so unless you require to drag the whole method outside, setting by ear might be the simplest. Even in case you did get it exactly right in an anechoic surroundings, this would alter one time it was in your listening room anyway.
It takes a small experimentation to get right, but is surprisingly simple to do. When properly set, a check track (or bass guitar) ought to be smooth from the highest bass note to the lowest, with no gross peaks or dips. Some are inevitable because of room resonances & the like, but you will discover a setting that sounds "right" with small difficulty.
I measured 80dB SPL at one meter in my workshop (sub-woofer perched on a chair in more or less the middle of the space) with at 25Hz & 70W. This improved dramatically when the unit was installed in the listening room, but as I said earlier, there is usually not a lot recorded below around 35Hz. The longest pipe on the organ is usually about 16Hz, but larger pipes still may be used. It was found necessary to cease group of diapasons (able to 8Hz) in the famous Sydney Town Hall organ because when they were used, the very low frequency caused building destroy.
Tuesday, December 24, 2013
Simple Solar Cell Voltage Regulator Circuit Diagram

Wednesday, October 2, 2013
1 5V POWERED LED FLASHER ELECTRONIC DIAGRAM
It is a charge pump design. This is where a capacitor (electrolytic) is allowed to charge and is then raised higher and allowed to discharge into a load. The load sees a voltage that can be higher than the supply.
Saturday, September 28, 2013
The Gentle Touch Circuit Diagram
Consumer appliances these days hardly ever have a proper mains switch. Instead, appliances are turned on and off at the touch of a button on the remote control, just like any other function. This circuit shows how a device (as long as it does not draw too high a current) can be switched on and off using a pushbutton. The approach requires that a microcontroller is already available in the circuit, and a spare input port pin and a spare output port pin are required, along with a little software. When power is applied T1 initially remains turned off. When the button is pressed the gate of T1 is taken to ground and the p-channel power MOSFET conducts. The microcontroller circuit is now supplied with power. Within a short period the microcontroller must take output PB1 high. This turns on n-channel MOSFET T1 which in turn keeps T1 turned on after the push-button is released.
Now the microcontroller must poll the state of the push-button on its input port (PB0) at regular intervals. Immediately after switch-on it will detect that the button is pressed (a low level on the input port pin), and it must wait for the button to be released. When the button is next pressed the device must switch itself of f: to do this the firmware running in the microcontroller must set the output port pin to a low level. When the button is subsequently released T1 will now turn off and the supply voltage will be removed from the circuit.
The circuit itself draws no current in the off state, and for (rechargeable) battery-powered appliances it is therefore best to put the switch before the voltage regulator. For mains-powered devices the switch can also be fitted before the voltage regulator (after the rectifier and smoothing capacitor). Since there is no mains switch there will still be a small standby current draw in this case due to the transformer. Be careful not to exceed the maximum gate-source voltage specification for T1: the IRFD9024 device suggested can withstand up to 20 V. At lower voltages R2 can be replaced by a wire link; otherwise suitable values for the voltage divider formed by R1 and R2 must be selected.
Circuit diagram:
The Gentle Touch Circuit Diagram
The author has set up a small website for this project at http://reweb.fh-weingarten.de/elektor, which gives source code examples (which include dealing with pushbutton contact bounce) for AVR microcontrollers suitable for use with AVR Studio and GNU C. Downloads are also available at http://www.elektor.com.
Rainer Reusch - Elektor Electronics 2008
Friday, September 20, 2013
1994 Saturn sedan 1 9L Wiring Diagram
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| 1994 Saturn sedan 1.9L Wiring Diagram |
Sunday, August 11, 2013
Power Mosfet Inverter Circuit Diagram

Tuesday, August 6, 2013
Cell Phone Jammer Circuit Diagram

Thursday, August 1, 2013
Battery Powered High voltage Generator Circuit Diagram

Monday, July 29, 2013
Antialiasing And Sync Compensation Filter Circuit Diagram

Friday, July 26, 2013
2005 Yamaha DT125X Wiring Diagram Electrical Schematic
Find the detail and complete 2005 Yamaha DT125X Wiring Diagram here on the last page of the service manual.
Saturday, April 13, 2013
Simple 500W Audio Power Amplifier Circuit Diagram with Transistor
Circuit Functional
I use the -85 volt when the output current is supplied to the drive 350 to 340 very hot. Increase the output present, but it was once too chilly. The output to warmth up sooner than a regular open it. Sounds evident, but sound high quality is somewhat excellent.
I recomment it by way of turning out for the evening. If the force is installed on the steel part out.
1963 Dodge Dart Electrical Wiring Diagram
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| 1963 Dodge Dart Electrical Wiring Diagram |
Friday, April 12, 2013
1998 Isuzu Rodeo 3 2 6 cyl Wiring Diagram
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| 1998 Isuzu Rodeo 3.2 6 cyl Wiring Diagram |
connector, relay ctrl, fuse box, rear wipper, starter, theft horn, black wire, horn, hazard
2009 BMW Z4 Wiring Diagram
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| 2009 BMW Z4 Wiring Diagram |
neutral gear switch, hego ground, power ground, exhaust gas oxygen sensor, engine coolant temperature sensor, throttle position, air charger temperature, barometric pressure sensor, EGR valve position sensor, mass air flow sensor, power relay, battery, WAC relay, A/C clutch, pressure switch.
1998 Chevrolet Suburban 1500 Wirng Diagram
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| 1998 Chevrolet Suburban 1500 Wirng Diagram |
Wednesday, April 10, 2013
2001 Chevrolet Chevy Lumina Wiring Diagram
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| 2001 Chevrolet Chevy Lumina Wiring Diagram |
stud, battery, ignition switch, starter solenoid, drive assembly, fusible link, return spring, plunger, theft deterrent relay, solid state, position switch, shifl lever, engine wiring harnes junction, fuse block, park neutral
Tuesday, April 9, 2013
1994 Saturn sedan 1 9L Wiring Diagram
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| 1994 Saturn sedan 1.9L Wiring Diagram |






