Installation:
You must start by installing a complete distribution, as described below. Then check for updates, which are installed on top of the distribution. The easiest way to bring the distribution to the latest recommended version is to use the Combined Update.
Complete Distributions:
Here are the instructions for installing the complete FreePCB distribution. Download the latest version of the software using one of the links for "Complete Distributions" below. You can choose from: An installer application, with a name like FreePCB_1200_setup.exe.A self-installing archive, with a name like FreePCB_1200_bin.exe.A zipped archive, with a name like FreePCB_1200_bin.zip Install the software into a folder on your hard drive such as C:\FreePCB or C:\Program Files\FreePCB. This folder should now contain subfolders as shown: The subfolder bin contains the FreePCB.exe executable and the default configuration file default.cfg.The subfolder doc contains documentation (such as this User Guide)The subfolder lib contains the core footprint libraries.The subfolder lib_contrib contains footprint libraries contributed by users.The subfolder lib_extra contains less commonly used footprint libraries.The subfolder projects contains folders for each projectThe subfolder src will be empty. You can install the source code into it using one of the "Source Update" links below.If you used the installer application, you were prompted to create a desktop shortcut to start FreePCB. If you used one of the archives, you can make a shortcut manually. Open the .\FreePCB\bin folder in Windows Explorer, and drag the file FreePCB.exe onto the desktop with the RIGHT mouse button. You should be prompted with a list of options including creating a shortcut.
Updates:
These are updates to selected files in FreePCB (usually just the executable, FreePCB.exe). You must have previously installed a complete package, as described above. Then you can download the update, unzip it, and replace the appropriate file(s). The Combined Update includes all of the files necessary to bring the distribution to the latest recommended version. Downloads
Complete Distributions: Version Contents Link 1.2 Installer FreePCB_1200_setup.exe 1.2 Self-installing archive FreePCB_1200_bin.exe 1.2 Zipped archive FreePCB_1200_bin.zip
Ahmet UZUN on 18 Mar 12" Precision Power Supply © 1986 Doug Bedrosian and 2010 Tony van Roon "This Precision Power Supply is a nice addition on your workbench as primary, or in my case, a supplementary power supply. With zero to 40V and 2A with adjustable current limiting it will surely gets lots of use on your bench. On average the most amperage for a power supply someone needs is around two or three amps. The sensitivity for current limiting is fully adjustable. Have fun building!" Introduction: Test instruments are considered to be some of the most useful tools available when constructing a project. They are also considered to be the most expensive tools one could buy. For instance, a power supply of any quality and usefulness can range from several hundred dollars to several thousand dollars. The alternative to buying a power supply is to build one. The power supply in this article has a voltage range from 0 to 40V and a current range from 0 to 2 amps with current limiting set by the user. The quality of the supply is determined by the time and care the builder takes while constructing it. How It Works: The power supply is best understood when divided into separate parts. The first parts to look at are the two power supply sections. The output supply section consists of XFMR1, Br1, C1, and C2. They supply the appropriate voltage and current required at the output. The IC supply consists of XFMR2, Br2, and C3. The two power supply sections must be separate from each other because a floating ground is required for IC1. The next section is the voltage control. RV1 and R2 determine the operating point of a constant current source out of pin 3 of IC1. By varying RV1 the maximum output voltage will be set. Pins 8 and 9 are inputs to a high gain differential amplifier contained in IC1. By adjusting potentiometer P1 the voltage at pin 8 will vary; this will cause the voltage at the output to change until it is equal to the voltage at pin 8. Due to the high gain of the differenti