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0 to 24 Volt 4Adjustable Power Supply: 0-24V4A adjustable power supply, text in Finnish (Electronic circuit added 5/02) |
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12V 30A Power Supply: Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power supply
can deliver output load currents of up to 30 amps. (Electronic circuit added 4/05) |
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1Variable Regulated Power Supply: (added 2/05) |
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230 Volt Dimmer: FAIR WARNING - THIS SITE HAS ANNOYING POP UPS (circuit / schematic added 2/03) |
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3V supply delivers 12V p p to piezo speaker: 10/16/03 EDN Design Ideas / (added 1/05) Low-profile
piezoelectric speakers can provide quality sound for portable electronic devices, but they require voltage swings greater than 8V p-p across the speaker element. Yet, most portable devices
include only a low-voltage power source, and conventional amplifiers operating from batteries cannot provide enough voltage swing to drive a piezoelectric speaker.... |
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5V Power Supply teams Low dropout regulator charge pump: 01/08/04 EDN Design Ideas / (added 1/05)
Auxiliary power of 3.3V is replacing the 5V auxiliary power that "silver boxes" supply in most computer systems, but some circuits still require a 5V supply. Such systems impose the messy task
of creating a central 5V auxiliary supply from the 3.3V auxiliary supply and then routing 5V power throughout the motherboard.... |
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Add gain to an absolute value Amplifier: 08/22/02 EDN Design Ideas / (added 1/05) 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 another dimension, G (gain),
to this key circuit. Because the gain is programmable, you can use the circuit as an absolute-value amplifier (G1) or an absolute-value attenuator (G>1).... |
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ADE7758 Phase Dropout Detection for VAR Calculation: AN-750 - Analog Devices Application Notes
(Circuit / schematic design added 6/06) |
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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 Power Supply: well filtered variable1.2-30 volts at5 amps using LM338K (Electronic circuit added 5/02) |
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Adjustable Voltage motor Controller: (Circuit / schematic design added 6/06) |
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Application Hint 30: Micrel App Note MIC2527 Voltage Drop, Packaging, and PCB Layout (Circuit / schematic design added
6/06) |
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Cascoded stack yields multiple Voltages: 03/16/00 EDN-Design Ideas / (added 2/06) |
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Circuit adds foldback Current protection: 07/21/05 EDN Design Ideas / (added 5/03) Enhance three-terminal
regulator with foldback oversight. |
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Constant Current Battery Charger: (circuit added 7/02) |
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Dual Power Supply: (Electronic circuit added 4/05) |
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Dual Regulated Power Supply: (Electronic circuit added 4/05) |
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Easy Power Supply: (Electronic circuit added 4/05) |
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High Current Power Supply: (Electronic circuit added 4/05) |
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High Current regulated Power Supply #2: (Electronic circuit added 4/05) |
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High Current Regulated Power Supply: (Electronic circuit added 4/05) |
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Lantern Flasher/Dimmer: (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. Thanks to automatic thermal shutdown, it will turn off if heating excessively. All in all, a very powerful (and affordable!) package,
indeed. Although LM317 is capable of delivering up to 37V, the circuit pictured here is limited to 25V for the sake of safety and simplicity. Any higher output voltage would require
additional components and a larger heat sink. Make sure that the input voltage is at least a couple of Volts higher than the desired output. It's ok to use a trimmer if you're building a
fixed-voltage supply. (added 10/05) |
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LM317 Variable Voltage Regulator: (Electronic Schematic / circuit added 4/02) |
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Low Drop Regulator (postscript File): (circuit / schematic added 2/03) |
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Low Voltage High Current Time Delay Circuit: (circuit added 7/02) |
