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Display Electronic Circuits or Electronic Schematics - Page 1a
Display Circuits: # - BC - GH - KLM -QR - ST - Z Last Updated on:
Tuesday, April 22, 2008 04:21 PM
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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
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....
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)
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)
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