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Lacie d2 and Big Disk Range v.2 Power Supply

aPowerSupply.com — Sat, 04 Feb 2012 16:06:35 +0000

A good start point for d2 and Big Disk Range v.2 Lacie power supply info and reviews for d2 and Big Disk Range v.2. Lacie is well known for their External hard drives, external, raid and network hard drive and therefore sometimes we need to buy a power supply.

d2 and Big Disk Range v.2 Lacie power supply

Item Number : 800049
Power :
- DC Output: 12V (4.6A) 55W
- AC Input: 110V / 220V
For Use With These Products :
- d2 Hard Drives v.2 (incl. d2 Network)
- d2 DVD and Blu-Ray writers (v. 2)
- Big Disk Quadra and Big Disk Network (v.2)
- LaCie Desktop Hard Disk Design by Neil Poulton
- LaCie Desktop Hard Disk (under 1TB)

IMPORTANT NOTE: You must only operate your drive using the corresponding power supply stated above. Using a power supply that was not intended for use with your drive could result in damage to the device and will void your warranty.

Power Supply Monitor for TTL

aPowerSupply.com — Fri, 03 Feb 2012 15:50:28 +0000

This simple TTL power supply monitor circuit monitors the 5-volt level TTL power line and gives a signal whether the supply voltage is outside or within the necessary range or “window”. The heart of the power supply monitor is a low-current integrated window comparator. The center of this window is set at 2.5 volt +/- 0.005 volt by the bandgap reference diode D1 which is connected to pin 2 of LTC1042. The width of this window must be 20% (+/- 10%) of the reference voltage.

The reference voltage is reduced by 25% through R4 and R5 and fed to pin 5 of the IC. The monitored voltage is then fed to pin 2 so that the green LED D2 will light up when the voltage is within the desired range. Otherwise, the red LED D3 will light up signalling that the voltage is out of range.

TTL power supply monitor circuit diagram

LM338 20A power supply

aPowerSupply.com — Thu, 02 Feb 2012 15:37:16 +0000

This is a regulated and adjustable power supply which can deliver up to 20A and adjustable voltage between 4 and 30V. It is easy to build and uses LM338 and 741 integrated circuits. VR1 it is used to adjust the output voltage. Use very good heatsinks for LM338 and BD140 transistor. The transformer secondary must deliver 18 volts a.c.

LM338 adjustable power supply circuit diagram

Enermax Revolution 85 PSU

aPowerSupply.com — Wed, 01 Feb 2012 15:20:56 +0000

The new Revolution85+ power supplies from Enermax were designed to deliver clean, stable outputs with high efficiency and minimal noise. The Revolution 85+ series comes in four different wattages: 850W, 950W, 1050W, and 1250W – although the last will only be available for 230VAC.
Revolution85+ power supplies are some of the first to be certified under the new 80 Plus Silver classification to be at least 85% efficient at 20% and 100% of the rated output and at least 88% efficient at 50% of the rated output power.
The feature list is impressive, with six 12V rails, no-load operation (which will be important for future hybrid power GPUs), power saving modes for upcoming CPUs, high efficiency, and all outputs rated at 50°C.

The six 12V rails are each rated at 30 amps, although Enermax has almost certainly set the OCP a little higher, i.e. 35 amps. There is more than enough power to connect the most demanding graphics cards, a highly overclocked processor, plenty of hard drives, and still have room to spare.
12V1 delivers power to the 24-pin ATX connector;
12V2 powers both the 4/8-pin and 8-pin EPS connectors;
12V3 is for the first and second graphics card connectors;
12V4 handles the first 12-pin socket and peripheral sockets 1, 2, and 3;
12V5 gets the second and third 12-pin sockets;
12V6 is for the fourth 12-pin socket and the remaining peripherals.

The distribution is very good and nobody should experience any overloads with today’s hardware. The 3.3V and 5V are both rated at only 25A, although this is still more than sufficient for modern systems. The standby 5V rail is stated at 5A, which is massive compared to many other power supplies, but it’s necessary in order to comply with the EPS12V regulations in version 2.92.

Enermax Revolution85+ 1,050W PSU Features

1,050W watt continuous power output (up to 50°C 24/7)
Compliant with the latest ATX12V and EPS12V standards
High efficiency operation (85-91% efficient at 20-100% load)
Six +12V rails for maximum safety and reliability (99% 12V output capable)
Asymmetric Hybrid DC-to-DC topology delivers high efficiency and stable performance
Synchronous transformer design provides optimal load balance and performance
12-pin Modular connectors designed to support future graphic adapters
Future CPU and GPU ready: (supports Zero Load, C6 State, and Hybrid Modes)
Gaming ready (SLI or CrossFire X) supports high-end graphic cards with 8 PCI-E connectors
Server ready (SSI PSDG 2008 1.0 compliant)
EMC electromagnetic filtering (CE EMC EN61204-3 compliance)
Quiet 13.5mm fan with intelligent speed control guaranties cool and silent operation
AirGuard: Patented air inlet with optimal aerodynamic design
HeatGuard: After shutdown, PSU fan keeps running to dissipate residual heat
SafeGuard: Protection circuits for OCP, OVP, UVP, OPP, OTP and SCP
PowerGuard: PSU status monitor with 4-mode LED
All high-quality Japanese capacitors for maximum durability and stability
Combination of fixed and modular cables for optimum performance and flexibility
Industrial look, beefy 3-piece housing

Enermax Revolution 85 PSU is a high efficiency computer power supply.

12vdc power supply circuits

aPowerSupply.com — Tue, 31 Jan 2012 14:57:00 +0000

4 simple 12Vdc power supply circuits with output voltages around 12V. First power supply circuit is built with BD139, one zener diode and a few passive components. Each of the schematic is very simple to construct and will function without problems if you respect the maximum power supply ratings.

12V dc power supply schematics

12V BD139 power supply circuit

LM7812 power supply schematic
A very simple PS circuit with the basic 3 Amper version of LM7812 IC.

LM317 variable power supply circuit

2N3055 adjustable power supply schematic
This PS circuit has a over-current protection and a good stabilized voltage. It can deliver up to 1.6 A.

LaCie Golden Disk | Brick Hard Drive | Hard Drive Power Supply

aPowerSupply.com — Mon, 30 Jan 2012 14:49:34 +0000

Golden Disk | Brick Hard Drive | Hard Drive Lacie power supply info and reviews for Golden Disk | Brick Hard Drive | Hard Drive. Lacie is well known for their External hard drives, external, raid and network hard drive and therefore sometimes we need to buy a power supply.

Golden Disk | Brick Hard Drive | Hard Drive LaCie Power Supply Specs

Item Number : 800040
For Use With These Products :
- LaCie Golden Disk
- LaCie Brick Desktop Drive
- LaCie Hard Drive, design by F.A. Porche v2

IMPORTANT NOTE: You must only operate your drive using the corresponding Golden Disk | Brick Hard Drive | Hard Drive power supply stated above. Using a power supply that was not intended for use with your drive could result in damage to the device and will void your warranty.

LM2678 voltage regulator

aPowerSupply.com — Sun, 29 Jan 2012 14:34:30 +0000

The LM2678 series of regulators are monolithic integrated circuits for a step-down switching voltage regulator capable of driving up to 5A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3V, 5V and 12V and an adjustable output version.

LM2678 12vdc 5amp voltage regulator schematic

LM2678 features

Efficiency up to 92%
Simple and easy to design with (using off-the-shelf external components)
120 mΩ DMOS output switch
3.3V, 5V and 12V fixed output and adjustable (1.2V to 37V ) versions
50μA standby current when switched OFF
±2%maximum output tolerance over full line and load conditions
Wide input voltage range: 8V to 40V
260 KHz fixed frequency internal oscillator

LM2678 applications

Simple to design, high efficiency (>90%) step-down switching voltage regulators
Efficient system pre-regulator for linear voltage regulators
Battery chargers

Amplitude modulation power supply

aPowerSupply.com — Sat, 28 Jan 2012 13:54:51 +0000

Modulated power supply is necessary for final stages of AM transmitters, transmitters with Gunn diodes in GHz frequencies. This amplitude modulating supply provides (in idle mode) an output voltage which can be adjusted with P1 between 6 and 8V; and when is modulated the output voltage is between 3 and 10V. Frequency domain is from 200Hz to 30kHz.
Without external load, the current consumption is 5mA. If T2 is cooled enough the modulation power supply cand deliver up to 800mA at 6V.

AM power supply circuit schematic

DC power controller

aPowerSupply.com — Fri, 27 Jan 2012 13:49:41 +0000

This DC power supply controller is controlled by pulse width modulation PWM, generated by the circuit around timer IC2 7555 according to the formula:
Duty cycle = ((R1 + (VR1/2)/(R1+R2+VR1)) x 100%
Diode D1 is used to bypass resistor R2 and half the effective resistance of the “lower” section of VR1, allowing the duty cycle to be varied from 0.01% to 99.9%.
The output at IC2 pin 3 is fed directly to power MOSFET TR1 to control the load. For loads greater than 3A, a heatsink must be used with TR1.
The DC power controller circuit is powered at 12V, regulated down to 8V by IC1 78L08. Capacitors C1, C2 and inductor L1 prevent noise being fed back into the power line when the load is being switched. Diode D2 prevents the generation of back-e.m.f. when switching inductive loads. It should be changed to a high power version if the load is greater than 3A.

DC power supply controller circuit diagram

SilverStone ST1200

aPowerSupply.com — Thu, 26 Jan 2012 13:32:25 +0000

ST1200 power supply is an excellent power supply which can reach 1200 Watt output with efficiency greater than 80% and with 100% modular cable system. Its full array of amenities such as dual PCI-E 8pin, six PCI-E 6pin, and six SATA connectors can support various power usage and up to three high-end graphic cards easily. Cooled by a quiet 135mm fan, the ST1200 is an awe-inspiring power supply with exceptional stability and optimal efficiency.
Silverstone Strider ST1200 1200W Modular Power Supply continues on with venerable features of SilverStone Strider series, as an excellent power supply which can reach 1200 Watt output with efficiency greater than 80% and with 100% modular cable system. Its full array of amenities such as dual PCI-E 8pin, six PCI-E 6pin, and six SATA connectors can support various power usage and up to three high-end graphic cards easily. Cooled by a quiet 135mm fan, the SilverStane Strider ST1200 is an awe-inspiring power supply with exceptional stability and optimal efficiency.
ST1200 Features

100% modular cables with cable bag
Efficiency greater than 80% (Max. 88%)
Class-leading six +12V rail(s) with 94A
1200W continuous power output rated up to 40℃
Silent running 135mm Fan with 19dBA
Japanese Capacitors
Dual PCI-E 8pin, six PCI-E 6pin, and six SATA connectors
Support ATX 12V 2.3 & EPS 12V
Active PFC

ST1200 specifications

Color: Black (lead-free paint)
Cooling System: 1x 135mm ball bearing fan
Noise Level: 19 dBA Minimum
Weight: 3.2kg 7 lbs.
Dimensions: 150mm x 86mm x 180mm(W x H x D)

ST1200 Silverstone power supply photos

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