| No. |
Power Supplies |
Description |
Flags |
| 04 | Dual Power Supply |
A power supply that is suitable for most amps of 60W output. Can be adapted or modified to other voltages for more or less power |
 |
| 05 | Preamplifier Power Supply |
Uses External AC Adapter. Safe and effective, and no hum! (PCB replaced by P05A) |
1999 |
| 05A | Updated Preamplifier Power Supply |
All the features of the original P05, plus lower noise and much more versatile |
Jan 05 |
| 05B | Updated Preamplifier Power Supply |
All the features of the original P05A plus a complete muting circuit. |
Apr 07 |
| 15 | Capacitance Multiplier Supply |
For Class-A Amps - Extremely low ripple power supply with much less power dissipation than a regulator |
2001 |
| 38 | Signal Detecting Auto
Power-On Unit |
When you have a sub-woofer or other equipment that needs to be turned on with the main amp, this is the answer. Detects signal and applies power. |
|
| 39 | Soft Start Circuit |
Designed for power amps using (large) toroidal transformers, this will limit the inrush current to a sensible value. A PCB is now available for this project, using a new circuit (shown on the project page). |
Jan06
|
| 40 | Load Sensing Auto Switch |
How to apply power to the entire audio system by turning on one item (typically the preamp). Note that this version is superceded by Project 79. |
|
| 43 | Ultra Simple Split DC Supply |
When you need a +/- supply, and only have a DC adapter, this little project might just be what you need |
1999 |
| 44 | Dual +/-25V Lab Supply |
Ideal for testing your latest creation, as the voltage can be advanced slowly to ensure that everything works as it should before "real" power is applied. Up to 800mA (typical) output current. |
|
| 69 | 12V Switching Supply |
Ideal for low power applications (such as equalisers or crossovers) in cars, where a +/-12V supply is needed. This project is a perfect starting point for anyone thinking of building a high power switching supply, as it teaches the basics without the risk of expensive things blowing up. |
2002 |
| 77 | 13.8V Power Supply / Charger |
A power supply for testing and working on car amplifiers, this unit can be scaled up to about 500 Amps! Easy to build, and ideal for powering any car amplifier for test or service. |
2003
|
| 79 | Current Sense Auto Power Switch |
A current sensing switch allows you to turn on multiple devices, just by turning on one master. Use it to activate the entire Hi-Fi by turning on the preamp, or turn on all your PC peripherals when you turn on the computer. |
2001
|
| 89 | Car Switchmode Supply |
The little supply (P69) has been here for a while, and here's the big one. This supply is good for up to about 350 Watts, although I suggest that a more modest power of around 250 W is more appropriate for the most part. High current and fully configurable to do what you want. Do not attempt to build this without adequate test equipment or experience. |
2002 |
| 95 | Low Power Switchmode Supply |
This little supply is designed to provide a negative voltage only, allowing you to use the car supply for the positive supply. Current is only about 20mA, but this will be enough to properly power many car audio projects |
2002 |
| 98 | Automatic Charger for Battery Hi-Fi |
Quite a few people like to use a battery supply for preamps especially, since the DC is completely smooth, and batteries are essentially noise free. Unfortunately, they also need to be charged, and this project is designed to disconnect the charger automatically when the preamp is switched on, and re-connect it when the preamp is turned off. |
2003 |
| 102 | Simple Pre-Regulator |
A great many constructors would like to be able to use P05 (Preamp Power Supply) from the main power amp supply, but the voltage is usually much too high. Resistors may be used to drop the voltage, but these must be calculated, and will not allow for any additional load. Using a pre-regulator allows you to reduce the voltage safely, and also provides a significant level of initial hum reduction. |
2003
|
| 108 | Switchmode PSU Protection |
Switchmode supplies are common, but most have no form of protection - especially home made types or many of the cheaper car amplifiers. This contributed project will add protection for over-voltage, under-voltage or high temperatures, and is cheap and easy to build. |
2004 |
| 118 | PC Peripheral Switch |
This ultra simple project uses only a modified power board and a small wiring loom in the PC. By using the PC's 12V supply, it is ultra reliable and cannot false trigger.  |
04Dec
|
