Calculators / Info

This is a small program to find transistor data. Not everything is listed (1442 different devices). Download a copy, place it into the directory of choice and run the program, which is a self extracting archive. There are two extracted files - ESP-TRAN.EXE and BIPOLAR.TXT, being the executable and database respectively. ESP-SEMI.EXE may be deleted after extraction unless you want to give a copy to someone else. New stuff can be added as you find the data. If you add a lot of stuff, feel free to e-mail me a copy of the new database (compressed, please!), and I will add it to the database file.

In this IC-Databook Software you will find pin assignments, connection layouts, function tables and the most important specifications available for the 40x.. and the 74x.. IC series. The current software version includes the data of more than 230 different IC's. You can easily add additional IC's or edit existing IC's and exchange them with other users.

This freeware resistor color code program is very useful for determining color codes or values for 4 and 5 band resistors. To select the mode, click on the 4 or 5 band resistor icon in the upper right. The lefthand 3 or 4 bands determine resistor value, the righthand band resistor tolerance. Now includes Surface Mount Device (SMD) Markings Evaluator and E-Series Standard Resistance Tables

555 Timer PRO EX provides an array of design wizards, circuit blocks and information panels that facilitate the use of the 555 timer in projects. Component value calculations for the 555 take into account the supply voltage, timer fabrication (CMOS or Bipolar), and, where appropriate, load currents.

This is an offline version of the Schematic Symbol Reference. It contains all the same info, but is a standalone program that requires no Internet connection to run. This will run under Windows 95, Windows 98 and NT4 Server and Workstation.