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1A Variable Regulated Power Supply - A 'must-have' for the experimenter.
(electronic design 05/09) |
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230 Volt Dimmer - FAIR WARNING THIS SITE HAS ANNOYING POP UPS (added 2/03) |
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3V supply delivers 12V p p to piezo speaker - 10/16/03 EDN-Design Ideas:
Low-profile piezoelectric speakers can provide quality sound for portable
electronic devices, but y require voltage swings greater than 8V p-p across
speaker element. Yet, most portable devices include only a low-voltage power
source,.....(design idea added 1/05) |
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5V Power Supply teams Low dropout regulator charge pump - 01/08/04 EDN-Design
Ideas: Auxiliary power of 3.3V is replacing 5V auxiliary power that "silver
boxes" supply in most computer systems, but some circuits still require a 5V
supply. Such systems impose messy task of creating a central 5V auxiliary
supply from 3.3V auxiliary supply and n routing 5V power throughout
morboard.....(design idea added 1/05) |
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Add gain to an absolute value Amplifier - 08/22/02 EDN-Design Ideas: The
absolute-value amplifier is a basic building block in test-and-measurement and
signal-processing applications. The addition of a DPP (digitally programmable
potentiometer) adds anor dimension, G (gain), to this key circuit. Because
gain is programmable, you can use circuit as an absolute-value amplifier
(G<1)or an absolute-value attenuator (G>1).....(design idea added 1/05) |
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ADE7758 Phase Dropout Detection for VAR Calculation - AN-750 Analog Devices
Application Notes (app note added 6/06) |
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Adjustable Power Supply (Aaron Cake) - well filtered variable1.2-30 volts at5
amps using LM338K (added 5/02) |
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Adjustable Power Supply using LM317 - voltage regulator for1.2V to35-Volt
output voltages and up to1A load (added 11/05) |
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Adjustable Voltage Motor Controller - One of the nice things about flying
electric is you can test run your motor in the house, workshop, or in the yard and
the neighbors won't complain. The problem is how to control the speed of the
motor. One way is to use the plane, radio, and speed control with the motor in it.
That's no fun! ....(electronic circuit added 4/05) |
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Cascoded stack yields multiple Voltages - 03/16/00 EDN-Design
Ideas:.....(design idea added 2/06) |
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Circuit Adds foldback Current protection - 07/21/05 EDN-Design Ideas: Enhance
three-terminal regulator with foldback oversight.....(design idea added 5/03) |
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Constant Current Battery Charger - A simple method of charging a battery from
a higher voltage battery is shown in the circuit below to the left. Only one
resistor is needed to set the desired charging current and is calculated by
dividing the difference in battery voltages by the charge current. So, for example
if 4 high capacity (4000 mA hour) ni-cads are to be charged at 300 mA from a 12
volt battery, the resistor need,....(circuit added 7/02) |
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Dual Power Supply (albert kreuzer) - Some brands of electrolytics have a small
inductance which will cause the regulator ICs to oscillate. Use tantalum caps for
C5/C6 to be sure (but also most normal electrolytic will work)….(electronic
circuit added 4/05) |
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Dual power supply delivers 8A with no heat sinks - 03/30/00 EDN-Design Ideas:
The circuit in Figure 1 is a high-current dual supply that provides 5 and 3.3V at
currents as high as 8A. The circuit uses a fixed-frequency, two-output,
current-mode synchronous-buck- controller.....(design idea added 2/06) |
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Dual Regulated Power Supply-PSU - (electronic circuit added 4/05) |
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Dual Voltage Regulator meets USB Power needs - 08/19/04 EDN-Design Ideas: This
Design Idea stems from the limited availability of IC voltage regulators that can
meet key USB-power specs, coupled with the need for turn-on sequencing and
rise-time control at each output. As always, for PC-related designs, minimum cost
is a primary motivation. USB specs require all loads to limit inrush current to
less than 100 mA plus 50 µC of charge when powered.....(design idea added 1/05) |
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Easy Power Supply - (electronic circuit added 4/05) |
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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 Current Power Supply (Aaron Cake) - (electronic circuit added 4/05) |
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High Current Regulated Power Supply - (electronic circuit added 4/05) |
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High Current Regulated Supply - Current of LM317 voltage is increased by using
an additional power transistors. ….(electronic schematic added 11/08) |
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High Current Supply uses Standard Three Terminal Regulator - 07/22/04 EDN-Design
Ideas: This Design Idea implements a simple voltage regulator that delivers high
output current. The basic idea is to parallel-connect multiple three-terminal
regulators.....(design idea added 1/05) |
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Lantern Flasher/Dimmer - The electronic lantern control circuit adds
high-efficiency dimming and flashing to an existing battery-powered lantern or
flashlight or to a custom design. For the car it makes a great lamp for
changing a flat tire, back seat reading or emergency engine work. The
flasher mode ... (Tony van Roon's electronic design added 2/06) |
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Lantern Flasher/Dimmer (techlib) - The electronic lantern control circuit
(fig. 1) adds high-efficiency dimming and flashing to an existing battery-powered
lantern or flashlight or to a custom design. For the car it makes a great lamp for
changing a flat tire, back seat reading or emergency engine work. The flasher mode
is useful for warning other drivers....(circuit / schematic design added 6/06) |
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Lantern Flasher/Dimmer (tomzi.geo) - Basically a high-efficiency dimmer, but
can also be used as a flasher. In dimmer mode, the LM358 (dual op-amp) is wired to
send pulses at a constant frequency. By adjusting the width of these pulses,
brightness of the bulb is controlled. In flasher mode, the same
potentiometer....(circuit / schematic added 2/03) |
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LM317 Regulator with Pass Transistor - (electronic schematic / circuit added
4/02) |
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LM317 variable power supply - A truly timeless circuit. LM317 is a versatile
and highly efficient 1.2-37V voltage regulator that can provide up to 1.5A of
current with a large heat sink. It's ideal for just about any application. This
was my first workbench power supply and I still use it. Since LM317 is
protected against short-circuit, no fuse is necessary.....(added 10/05) |
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LM317 Variable Voltage Regulator - (electronic schematic / circuit added 4/02) |
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LM317T Variable Voltage Regulator - The LM317T is a adjustable 3 terminal
positive voltage regulator capable of supplying in excess of 1.5 amps over an
output range of 1.25 to 37 volts. The device also has built in current limiting
and thermal shutdown which makes it essentially blow-out proof.,.... (added
05/06/07) |
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Low Voltage High Current Time Delay Circuit - (circuit added 7/02) |
