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HeNe Laser Power Supply (Aaron Cake) - (circuit added 7/02) |
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High & Low Voltage Cut Off With Time Delay - The power line fluctuations and
cut-offs cause damages to electrical appliances connected to the line. It is more
serious in the case of domestic appliances like fridge and air conditioners. If a
fridge is operated on low voltage, excessive current flows through the motor, which
heats up, and get damaged.….(electronic schematic added 08/08) |
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High Current LM317 Regulated Power Supply - The high current regulator below
uses an additional winding or a separate transformer to supply power for the LM317
regulator so that the pass transistors can operate closer to saturation and improve
efficiency. For good efficiency the voltage at the collectors of the two parallel
2N3055 pass transistors should be close to the output voltage. ….(design added
11/08) |
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HeNe Laser Power Supply (Aaron Cake) - (circuit added 7/02) |
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High & Low Voltage Cut Off With Time Delay - The power line fluctuations and cut-offs
cause damages to electrical appliances connected to the line. It is more serious in the
case of domestic appliances like fridge and air conditioners. If a fridge is operated on
low voltage, excessive current flows through the motor, which heats up, and get
damaged.….(electronic schematic added 08/08) |
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High Current LM317 Regulated Power Supply - The high current regulator below uses an
additional winding or a separate transformer to supply power for the LM317 regulator so
that the pass transistors can operate closer to saturation and improve efficiency. For
good efficiency the voltage at the collectors of the two parallel 2N3055 pass transistors
should be close to the output voltage. ….(design added 11/08) |
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High Current Power Supply - Since my page was first posted, I have received a number
of emails asking about a high current power supply. I looked around, but couldn't find one
that was suitable. So, I designed this. It is a linear supply, which might have a few of
you rolling your eyes, but it takes very few parts, is simple to build and can supply huge
currents. ….(electronic schematic added 11/08) |
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High voltage Amplifier Drives piezo tubes - 12/07/04 EDN-Design Ideas: Piezoelectric
tubular positioners that drive manipulators in scanning tunneling microscopes require
high-voltage, low-current drive circuits. The circuit in Figure 1 can drive
high-resistance, low-capacitance piezoelectric loads at a -3-dB bandwidth of 6 kHz. It
offers a low-cost alternative to commercial drivers.....(design idea added 10/05) |
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High Voltage Amplifier uses simplified circuit - 10/14/04 EDN-Design Ideas: Many
scientific instruments and sensors need ac high-voltage drive. High-voltage drive is
useful for driving electrodes in many applications. The challenge is to boost the output
of a conventional op amp to high voltages. Available ac high-voltage amplifier modules are
limited to approximately 1200V p-p.....(design idea added 5/05) |
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High Voltage Breakdown Tester - (Not for beginners!) The following circuit is
used to determine the breakdown voltage of electronic components without causing permanent
damage. The circuit quickly ramps the high voltage up from zero and stops when the leakage
current reaches a preset amount up to 100 uA. When power is applied the
two-transistor flasher circuit drives the complimentary-symmetry....(electronic circuit
added 7/03) |
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High Voltage Electronic Dazer - (schematic / circuit added 10/02) |
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High Voltage Generator (Charles Wenzel ) - The simple circuit can be used at very low
frequencies, RF frequencies, low voltages, or even very high voltages with careful
selection of transistors. The power handling capability and power consumption are also
easily modified to suit the requirement.....(added 7/03) |
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High Voltage Generator for Low Current Applications - Scroll down to find this
circuit. Here is a simple circuit for generating over 100 volts from a 12 volt
source for powering low current devices and experiments. The two transistors may be 2N4401
and 2N4403 or similar for lower power applications or higher....(electronic circuit added
7/03) |
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High Voltage High Current Power Supply (Aaron Cake) - lots of power form microwave
oven transformer (added 04/03/02) |
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High voltage high frequency Amplifier drives piezoelectric PVDF transducer - 07/24/08
EDN-Design Ideas: Finding wide use in nondestructive testing, a high-voltage,
high-frequency amplifier drives a piezoelectric PVDF transducer.....(design idea added
09/08) |
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High Voltage Low Current Supply - A high voltage power supply is a very useful source
which can be effectively used in many applications like biasing of gas-discharge tubes and
radiation detectors etc. Such a power supply could also be used for protection of property
by electric charging of fences. Here the current requirement is of the order of a few
microamps.... (added 10/05) |
High Voltage Regulator is 100% surface mountable - 11/24/99 EDN-Design Ideas: It can
be difficult to generatea high-voltage supply from a medium-voltage input, especially if
you need a surface-mount design. It is difficult to find surface-mount components with the
necessary specs, especially the transformer and power switches. High-voltage surface-mount
capacitors can also be hard to locate. The circuit.....(design idea added 2/06) |
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How Van De GrAAff Generators work - Most of us have seen the device, known as a Van de
Graaff generator that makes your hair stand on end. The device looks like a big aluminum
ball mounted on a pedestal. Have you ever wondered what this device is, how it works, why
it was invented, or how you might build1-yourself? (added 4/02) |
