µP Displays 10 Bit Data on Three LEDs:  11/07/96 EDN-Design Ideas / (added 08/05)  circuit in Figure 1 uses a PIC16C55 µP to read 10-bit binary data and directly display  data in decimal format on three common-cathode LED displays. If value of  data exceeds 999,  displays show three hyphens (---) to represent overflow.  PIC16C55 has high drive capability. Each output pin can source 20 mA and sink 25 mA;  outputs can thus directly drive  LED display

0 to 24 Db Gain Amplifier and Balanced Line Driver:  (electronic (schematic / circuit added 4/02)

12 Db Amplifier and High Current Line Driver with DC Servo:  (design circuit added 8/02)

128x64 LCD Driver for AT90S2313 (Zip File):  (electronic circuit added 4/05)

12V DC Fluorescent Lamp Driver:  (electronic circuit added 4/05)

15V Battery Powers White LED Driver:  09/30/04 EDN Design Ideas  /  (added 1/05)  Although white LEDs are common in a variety of lighting applications, ir 3 to 4V forward-voltage drop makes low-voltage applications challenging. Charge pumps and or ICs are available for driving white LEDs, but y generally don't work with  low supply voltage of 1.5V in single-cell-battery applications....

16x16 LED Matrix and Driver:  (circuit added 9/04)

2 Wire LCD Interface using PIC16cf84:  (schematic / circuit design added 9/02)

20 Db Amplifier and High Current Balanced Line Driver:  (circuit added 7/02)

2-Way Multiplexed LCD Drive and Low Cost A/D-Converter using V/F Techniques with COP8 Microcontrollers:  National Semiconductor Application Note   (app note added 2/06)

3-Colour Display using Bicolour LEDs:  (electronic Circuit / Schematic added 10/04)

5301 Wideband Fuel Mixture Display:  (circuit / schematic design added 6/06)

7 by 10 LED Moving Sign ( 27c512 Eprom):  (electronic circuit added 4/05)

7 Segment LED Counter:  (circuit added 7/02)

7 Segment Rolling Display using PC:  It is very interesting and convenient to be able to control everything while sitting at your PC terminal. Here, a simple hardware circuit and software is used to interface a 7-segment based rolling display. The printer port of a PC provides a set of points with some acting as input lines and some ors as output lines. Some lines are open collector type which can be used as input lines. The circuit given here can be used for interfacing with any type of PC’s printer port. The 25-pin parallel port connector at  back of a PC is a combination of three ports.. (added 10/05)

72 LED Clock:  (circuit added 7/02)

8x8 Animated LED Signboard:  The firmware supplied in  current sourcecode archive is VERY BASIC. I do intend to draw more patterns. However, a vast workload coupled with possible emigration has put  finished firmware on hold. Please do go ahead and build this circuit though  supplied firmware is fully functional. You can have hours of fun designing your own patterns and effects!  (project added 10/06)

9 Second Digital Readout Timer:  (circuit added 7/02)

A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP):  AN-772 Analog Devices Application Notes  (app note added 6/06)