Magic eye tube A magic eye tube or tuning indicator, in technical literature called an electron ray indicator tube, is a vacuum tube which gives a visual indication of the amplitude of an electronic signal, such as an audio output, radio frequency signal strength, or other functions. The Magic Eye VU Indicator using vacuum tube Gadgetronicx This makes the magic eye tube a perfect choice to display a one dimensional V U characteristic of a given wave in real time. THE POWER SUPPLY CIRCUIT: The PSU circuit, basically employs a 555 timer to set a stable oscillation frequency for the MOSFET, which in turn uses the property of inductors, that whenever an abrupt change of current occurs, a voltage spike is induced on the output. Magic Eye Circuit Using 4049 IC engineersgarage Magic eye can be used as automatic guest indicator in your home. Just install this at the bottom of the door and whenever a person would arrive, his shadow will fall on the circuit giving an indication that somebody is present on the door without the knowledge of the visitor. It can also used as a prevention measure against vandalism. Magic Eye using 555 Timer IC Engineers Garage Magic eye can be used as automatic guest indicator in your home. Just install this at the bottom of the door and whenever a person comes at door its shadow will fall on light dependent resistor and will ring the bell. Giving you an indication that somebody is present on the door without the knowledge of the visitor. The Magic Eye Tuning Indicator r type.org (a) Circuit symbol for the Magic Eye tuning indicator type 6U5G (b) The 6U5G in a working circuit. An early version of the 'Magic Eye' is given by the valve type 6U5G and, since this represents what is virtually the simplest type of device available using Magic Eye principles, we shall use it for an introductory example. Adding a Magic Eye to a Hallicrafters S 20R Then connect the voltage doubler to the magic eye as follows: The junction of C1 and SR1 connects to pin 2 of the magic eye socket. The junction of C2 and SR1 connects to pin 7 of the magic eye socket. The junction of C1 and C2 connects to pin 8. Also connect the cable wire that will run to the Ground connection at the receiver's accessory socket. FC's Fluorescent Magic Eye Tubes The 6U5 6E5 tube is one of the most common magic eye tubes, it was frequently used as a signal strength indicator in 1940s and 1950s consumer radios. The 6U5 6E5 uses an antique 6 pin tube base and has a 6.3V filament. All About Magic Eye Tubes A magic eye tube is an electronic vacuum tube that provides visual indication, usually in the form of green light, on an area called the targetinside the tube. The target is partially illuminated with the exception of the shadow area, which varies in size and shape depending on the signal applied to the tube. Magic Eye Stuff | Threeneuron's Pile o'Poo Magic Eye Organ. An inexpensive circuit to power a magic eye from 12V, and it responds to sound. Magic eyes use very little plate current. Less than 3mA, and often much less. An EM84 can also be used if R17 is increased to 33 ohms. End. Electronic Eye Controlled Security System Circuit using LDR Electronic eye is also called magic eye. As the automation is an emerging technology these days, just imagine a door bell that automatically rings when a person visits your home. This also provides security when any person is trying to enter into your home without your permission. Tuning Eye Some sets use an electron ray (tuning magic eye) tube to aid in tuning the set exactly to the station. The eye tube gives a visual indication of when the receiver is properly tuned to the signal being received. Life span of a magic eye Radiomuseum.org Life span of a magic eye Gentle fellows, few years ago I purchased some russian magic eyes (I don't recall the code right now, but it's not important) as generic substitutes for 6E5 type tubes. As those tubes looked brand new, I then stocked a few. EM84 87 MAGIC EYE VU METER Simple "test" magic eye vu meter circuit. Eye used was EM84 or EM87, i dont remember. Made this video some time ago, but didnt upload it to youtube. Supply voltage was about 250V. I have also used ... Magic Eye Projects After assembling my prototype circuit, the magic eye tube ran successfully for eight hours drawing about 190 milliamps. Above is the schematic for my circuit, which I hope will open the door for many other creative opportunities for use of the magic eye tube. The 6E1P 6BR5 EM80 Magic Eye and Other Indicator Tubes The 6E1P 6BR5 EM80 "Magic Eye" and Other Indicator Tubes. ... reconcile ourselves to evoke "magic eyes" on radio stations that do have that a. ... This circular, with a cover in center, recalls the appearance of an eye. The side of EM1 is found for the same reception conditions, four bright areas, like four leaf ... "Eye" Tube Hints Good eye tubes such as 6E5 and 6U5 are getting harder to find. Many of the old ones still have filaments but have lost most of their green glow. You can increase the green by a slight modification of the circuit. These tubes were originally specified for operation on 250 volts. Magic eye circuits for 6E5 Google Groups Magic eye circuits for 6E5 Here are some hook up ideas: Magic eyes are pretty simple to play with, once you get use to them. As with all "small signal" triodes (the front end of this tube), a... Solid State Replacement for 6U5 & 6E5 Magic Eye Tubes The circuit is based on a PIC16F684 microcontroller and a JFET input buffer. The JFET buffer provides a very high input impedance to match that of a vacuum tube, and in addition, it provides a means to measure the radio AVC voltage which can swing outside the range of the microcontroller power supply. LDR based Electronic Eye Security Control System Circuit The circuit of the electronic eye security control system is separated into two parts such as a logic circuit and power supply. The power supply circuit is designed with a battery, capacitors, P N junction diode and regulators. Here diode is connected in forwarding bias mode and it protects the circuit from negative voltages. Magic Eye Tube Submitted by BayLab for the Instructables ... A Magic Eye tube is an old device that was originally used to indicate how well a radio was tuned to a specific station. In this Instructable, you'll learn how to Magic Eye Tubes work, where to get them, the different kinds of tubes, and how to use them in your projects. Antique Radio Forums • View topic magic eye weirdness ... As previously observed, grid voltage for the eye tube is developed off the FM discriminator, which is an entirely different circuit from the set's AM detector. A mode switch operated by the band select pushbutton connects the eye tube grid to the active circuit. VU meter with EM84 tube – AntiMath The magic eye tubes are just small CRT derivations, usually they also have a triode built in, as an amplifier. Magic Eye Tube Vu Meter Schematic WordPress Magic Eye Tube Vu Meter Schematic >>>CLICK HERE<<< This is the complete schematic of the above circuit. The magic eye tubes are just small CRT derivations, usually they also have a triode built in, as an amplifier. it made perfect sense to use magic eye tubes as vu meters, although EM84. instructables . Schematic Diagrams: Joule Thief History of Tuning Indicators: meters, graphs, Magic Eye, LED History of Tuning Indicators: meters, graphs, Magic Eye, LED The history of Tuning Indicators is nearly as old as radio itself. We are not beginning with the sounders, galvanometers etc. to show a line currant and signal in telegraphy which have existed well over 100 years. Radio Electronics Projects One Tube Direct Conversion Receiver. This project makes interesting use of the unique characteristics of a 6JH8 beam deflection tube. I used this in the Summer 2008 Homebrew DX contest and logged 109 stations with it. More info … DIYcrap: Magic Eye Tube 6e5c I could not find a schematic, but drew the circuit diagram based on the PCB on a piece of paper in order to understand the circuit. From my understanding it is a basic buffer audio amplifier followed by a DC coupled stage that rectifies the negative half cycle to provide the negative DC to drive the Magic Eye Tube. GLOWBUGS INFO: Evergreen Exciter for the Special Night Magic Eye fluorescent screen is powered from the same source; choke L4 in the amplifier's grid circuit (in place of 33k resistor) I got more power, better tone, and, finally, The Magic Green Glow. Santa was right. Magic Eyes – Valves or Tubes Magic Eyes. These are mostly miniature Cathode Ray Tubes (CRT) with an electrode (or several) to vary the size of a shadow according to signal level. One Magic Eye works in a similar way to a VFD (Vacuum Florescent Display), the DM70 DM71. The DM160 and the similar Russian iv15 are not Magic Eyes, just VFD type indicators. Can you spot these hidden images in Magic Eye illusions? BT Can you spot these hidden images in Magic Eye illusions? ... i've never been able to see the picture in the magic eye posters and i can't help but think i'm missing out ... or people who have one ... The Tuning Eye How It Works, January 1955 Popular ... The Tuning Eye How It Works. By E. Bukstein The electron ray tube, or as it is more familiarly known, the "tuning eye," is a voltage indicator which, in many applications, replaces the far less rugged and far more costly meter movement. As shown in the drawing of Fig. 1, the plate of the tuning eye tube is circular and is known as the "target." Converting Surplus Transmitters for Novice Use 7 to 9.1 MC. The transmitter circuit consists of a 1626 triode variable frequency oscillator that drives a of IG25s in parallel, which for Novice be run at 75 watts input. In addition to the 1626 and 1625s the transmitters include a 1629 magic eye tube, which was used as a reso nance indicator with a crystal for checking the dial calibration.

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electro u2013 antimath

electro u2013 antimath

philips 939 top super eight tube radio 1939 vintage

philips 939 top super eight tube radio 1939 vintage

top circuits page 576 next gr

top circuits page 576 next gr

interfacing lcd with atmega32 avr microcontroller circuit

interfacing lcd with atmega32 avr microcontroller circuit

tubegeek de 5842 tube amplifier

tubegeek de 5842 tube amplifier

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documentation core features authentication

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