Regulator Controller
Regulator Controller
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T-Fal Vitesses 1.7L (7-Cup) Electric Kettle $38.99 1.7L VitesseS Kettle… |
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Johnson Controls A19AAT-2C Freezer Temperature Controller $48.70 Use this handy controller to regulate the temperature in your freezer between 20 – 80F . Great for turning a chest freezer into a keg refrigerator. Strictly a mechanical thermostat for cooling only, it is simple to use and economical. It operates with a gas filled probe on a 6-foot capillary tube. When the gas contracts or expands in the probe, it triggers a mechanical device inside the control wh… |
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Refrigerator or Freezer Thermostat (Temperature Controller) $47.40 With the thermostat control you can turn any freezer or refrigerator into a sophisticated lagering device and more accurately control the temparature of your ales. Simply place the temperature probe into the freezer, plug the thermostat into the outlet and then your freezer into the Contrl. This thermostat has a range from 30 degrees F to 80 degrees F. Plus with the purchase of this thermostat rec… |
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Planet Waves Humidipak Automatic Humidity Control System (for guitar) $13.65 Planet Waves, in collaboration with Humidipak, brings you the first two-way humidity control that maintains a constant 45% relative humidity level. The patented Planet Waves Humidipak completely eliminates all the guesswork and anxiety of maintaining your instrument’s proper humidity level. No more guessing if or when to refill the humidifier and worrying about drips or mess. Unlike all refillable… |
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Trinity Vibes Wand Massager Speed Controller for Hitachi Wand $29.51 This speed control box allows you to perfectly adjust the speed of the Hitachi magic wand to the level best for you. Previously users were limited to two speeds. Now the possibilities are endless. It even works with other similarly limited plug-in vibrators. If that was not good enough, it also acts as a 6 foot extension cord, so you can dial up the perfect speed farther from the nearest electrica… |
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APC LE1200 Line-R 1200VA Automatic Voltage Regulator $44.00 APC Line-R 1200VA Line Conditioner With AVR LE1200 Line Conditioners… |
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Xantrex C60 Charge Controller for Wind and Solar Generators $152.99 The C60 is a rugged 60 Amp controller that is the perfect controller for handling any DC charging source. Xantrex charge controllers are versatile and reliable. The C60 is a 100% solid state, microprocessor-driven controller which is UL and cUL listed. Like all Xantrex charge controllers, the C60 controller is flexible and can be configured for a variety of applications. The C60 is excellent fo… |
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Koss VC20 Volume Control $3.86 The VC20 provides convenient level adjustment from any stereophone. It includes pocket/belt clip for comfortable cord positioning. The VC20 connects to any 1/8″ stereophone jack…. |
LTC3851 Single Output DC/DC Switching Regulator Controller
Self regulating, no load protected electronic ballast system
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Referring to the FIGURE, there is shown improved self-regulating, no load protected electronic ballast system 10 having power source 12 for actuation of at least one gas discharge tube 66. Gas discharge tube 66 may be a standard fluorescent type system having first and second filaments 68 and 70, respectively. Self-regulating, no load protected electronic ballast system 10 is provided to maintain the output and input power of gas discharge tube 66 at a predetermined value which is substantially constant during operation and substantially constant and independent of electrical component tolerances from one electronic ballast system 10 to another.
In overall concept, improved self-regulating, no load protected electronic ballast system 10 is provided for maximization of efficiency of light output from gas discharge tube 66 with respect to power input from power source 12. Additionally, improved self-regulating, no load protected electronic ballast system 10 provides substantially constant light output within a narrow tolerance range. The light output of gas discharge tube 66 is maintained at a predetermined level which is insensitive to voltage variations, as the output to the gas discharge tube is responsive to a pulsating driving current, the magnitude of which is regulated. As will be seen in following paragraphs, the output voltage of improved electronic ballast system 10 is limited and substantially reduced when gas discharge tube 66 is electrically removed from the circuit.
Of particular importance, electronic ballast system 10 provides a regulation control 17 which eliminates the need for adjusting or pre-selecting transistors of specific gain, in order to provide a relatively constant light output substantially independent of manufacturing tolerances associated with the manufacture of electronic components which form the ballast system. Additionally, the regulation control circuit 17 limits the maximum output voltage to gas discharge tube 66 in response to voltage increases from power source 12 by maintaining the driving current at a predetermined value.
The output voltage is further controlled by the no load protection circuitry 99 which functions to reduce the output voltage below its normal operating voltage when the gas discharge tube 66 is electrically removed from the circuit, either by its failure or by its physical removal from the system. Load protection circuitry 99 also provides isolation between the regulation control circuitry of ballast system 10 and the high voltage discharge of the gas discharge tube 66.
Additionally, the improved self-regulating, no load protected electronic ballast system 10 provides for a frequency control mechanism using the inductive characteristics of inverter transformer 40 and the tank circuit formed by the center tapped secondary winding 160 of transformer 100 and capacitors 132 and 134. This circuit arrangement for frequency control allows for frequency stabilization with the advantage of permitting electronic ballast system 10 to operate in a normal manner without bothersome visual flickering.
Particularly, operation of the gas discharge tube 66 is maintained at minimum current levels, due to the higher efficiency obtained by improved self-regulating, no load protected electronic ballast system 10, thus improving its life characteristics. Of importance to the reliability of system 10 is the minimumization of electrical components coupled with the simplicity of the circuitry associated with ballast system 10. This concatenation of elements has the effect of increasing reliability of improved self-regulating, no load protected electronic ballast system 10 while simultaneously maximizing the operating lifetime for gas discharge tube 66.
Referring now to the FIGURE, electronic ballast system 10 is coupled to a power source 12 for actuating gas discharge tube 66, such includes rectification circuit 16 coupled to power source 12 for establishing a pulsating direct current voltage signal. The output from rectification circuit 16 is coupled to filter circuit 11 for establishing a substantially smooth direct current voltage signal.
The improved self-regulating, no load protect electronic ballast system 10 further includes induction circuitry 15 which is electrically coupled to filter circuit 11 for establishing the magnitude of a pulsating driving current established by switching network 13. As will be detailed in following paragraphs, induction circuitry 15 includes no load protection circuit 99 for generating a voltage across gas discharge tube 66 responsive to the pulsating driving current, and for maintaining the output voltage at a predetermined value when gas discharge tube 66 is not electrically connected to ballast system 10. Induction circuit 15 is coupled to regulation control circuit 17 for maintaining a gain value of switching network 13 to a predetermined level.
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