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Line Power Supply - This circuit provides a regulated output without a power
transformer. It is similar to common circuits, except that a zener diode is replaced
with an SCR. This is far more robust against line voltages surges than a zener diode
version, plus there is no heat generation. C1 sets the available current (20mA/uF @
60Hz). R3 sets the output voltage (~.55V/K). The bipolar outputs are separately
adjustable by R3 and R5. Designed by Andrew R. Morris (added 09/05) |
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LM317 Regulator with Pass Transistor - (electronic circuit added 10/05) |
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LM5068-48V Hot Swap Controller - National Semiconductor Application Note
(app note added 6/06) |
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Low Battery Voltage Cutout Circuits - (circuit added 05/06/07) |
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Low Voltage Hot Swap Controller Ignores Backplane Noise and Surges - DN319
Design Notes (Linear Technology) (app note added 6/06) |
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LTC1645 Dual Channel Hot Swap Controller/Power Sequencer - DN217 Design
Notes (Linear Technology) (app note added 6/06) |
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LTC1646: Power Supply Isolation Controller Simplifies Hot Swapping the CompactPCI Bus
for 5V-/3.3V-Only Applications - DN253 Design Notes (Linear Technology) (app
note added 6/06) |
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Philips PW 4029 regulated power supply schematic - (circuit added 04/05/06) |
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Regulated 12 Supply - This circuit above uses a 13 volt zener diode, D2 which
provides the voltage regulation. Aprroximately 0.7 Volts are dropped across the
transistors b-e junction, leaving a higher current 12.3 Volt output supply. This
circuit can supply loads of up to 500 mA. This circuit is also known as an amplified
zener circuit. (added 10/05) |
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Safe Hot Swapping using the LTC1421 - DN139 Design Notes (Linear Technology)
(app note added 6/06) |
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Simple VCOM adjustment uses any logIC Supply Voltage - 09/30/04 EDN Design Ideas
/ (added 1/05) All TFT (thin-film-transistor) LCD panels require at least
one appropriately tuned V COM signal to provide a reference point for the panel's
backplane. The exact value of V COM varies from panel to panel, so the manufacturer
must program the voltage at the factory to match the characteristics of each
screen.... |
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Soft Start power Supply - The output voltage rises slowly and reaches 15 V in 5
seconds. In order to perform this soft-start function, the LM317 voltage
regulator IC requires an external universal PNP transistor and the L200 uses its
internal comparator (pin 2). After switch-on, the rising voltage on the positive
side of the charging electrolytic capacitor slowly turns the (initially conducting)
transistor off,...(added 10/05) |
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Stabilised power unit - I made the stabilised power unit which used the switching
regulator. AC100 V is used for the input of the power unit. The output voltage can be
changed from 5 V to 30 V. The output current can pour a maximum of 4 A. I made this
power unit as the power unit of the electronic circuits making for the
experiment...(schematic added 05/08) |
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UltraLow Noise Switching Power Supplies Simplify EMI Compliance - DN316
Design Notes (Linear Technology) (app note added 1/06) |
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Universal PSU - A Universal Power supply based on the L200 regulator, which
includes an outboard pass transistor to boost output currents up to 4 amps.
(added 11/05) |
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VCOM Adjustment uses Any Logic Supply Voltage - 09/30/04 EDN Design Ideas /
(added 1/05) All TFT (thin-film-transistor) LCD panels require at least one
appropriately tuned V COM signal to provide a reference point for the panel's
backplane. The exact value of V COM varies from panel to panel, so the manufacturer
must program the voltage at the factory to match the characteristics of each
screen.... |
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Wide-range regulator delivers 12V, 3A output from 16 to 100V source - (Design
Ideas - EDN, 06/23/2005) Buck regulator tackles high input voltages. (electronic
design idea added 9/2008) |
