Solid-State FET-Based Ion Tweeter
The intention of this project is to design and build a working ion transducer using modern solid-state devices for high efficiency which can be used as a high-quality sound reproducer.
LM3914 - Dot/Bar Display Driver
The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors. This feature is one that allows operation of the whole system from less than 3V.
The circuit contains its own adjustable reference and accurate 10-step voltage divider. The low-bias-current input buffer accepts signals down to ground, or V-, yet needs no protection against inputs of 35V above or below ground. The buffer drives 10 individual comparators referenced to the precision divider. Indication non-linearity can thus be held typically to ½%, even over a wide temperature range.
Circuits and Projects of LM3914
Added some pictures of my Blue LED displays & VFD displays in the LED Clock and VFD Clock sections. Added some pictures of my DCF77 LCD-Clock and my DCF77 Nixie Clocks in the LCD Clock and Nixie Clock sections.Modified the Countdown 3 page and added new schematics and PCB layouts as well as component layouts in my Countdown 3 project.
PicBasic Pro, PicBasic, Basic Stamp, PIC Micro,and 8051 Microcontroller Projects.
Hans Wedemeyer's Projects, Code and More
Universal Radiation Spectrum Analyzer, Jornada Cradle modification and How to Make a Serial Cable, Multi-channel Analyzer Program for the Universal Radiation Spectrum Analyzer, DC Motor Speed Control, Two Channel Platinum Probe Serial Thermometer, Single Channel 24 bit USB ADC and others.
Electronics, computers, hardware, software.
and more...
Microcontrollers, Analog, RF, and all three mixed. Most projects can be assembled from readily available parts without the need for specialized equipment.
SB-Projects
Knowledge Base: A collection of information on a variety of topics. Finished projects, Some ideas, Repair tips.by San Bergmans, Oisterwijk, The Netherlands.
Electro Tech Electronic Projects
An electronic forum. Includes a collection of small electronic circuits. Electronic Circuits Projects Diagrams Schematics Electronics Circuit Project.
Electronics Circuits, Schematics, PCB, Product Design and Projects Search Engine.
