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10 Tricks for Interfacing to the PIC16c508 - (electronic circuit added 7/03) |
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15-Step Digital Power Supply - (electronic Circuit / Schematic added 10/04) |
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16 bit adjustable reference uses 8 bit digital potentiometers - 12/25/03 EDN
Design Ideas / (added 6/06) It may be easy to find a precision
voltage reference for your application; however, a programmable precision reference is
anor matter. circuit in Figure 1 yields a precision reference with an LSB of
62.5 µV. circuit is a 16-bit DAC using three 8-bit digital potentiometers and
three CMOS op amps.... |
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16 Bit PC Serial Port Receiver CMOS - (electronic circuit added 10/05)
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2 Transistors Form Bidirectional Level Translator - 11/07/96 EDN-Design Ideas /
(added 5/03) This example illustrates a translation from 5 to 3V, but it can
accommodate almost any other voltage levels, provided the logic-low levels are equal
(usually 0V). Translations from 1 to 100V are possible, albeit rather slow. The key to
this circuit is the unusual cross-coupling of the emitters.... |
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2 Wire LCD Interface using PIC16cf84 - (schematic / circuit design added 9/02) |
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2.5 GHz Frequency counter - This project describes a very powerful frequency
counter. Very simple construction which everyone can build. 6 LED display will present
the frequency with 1kHz resolution and RS232 communication to computer is available as
option. The software has also been implemented with some smart functions, for
calculating frequencies in receivers where IF is 455kHz or 10.7MHz. I present
schematic, PCB, components and window software. ….(design added 11/08) |
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25 Watt MosFet Audio Amplifier - High Quality simple unit. No need for a
PreAmplifier (added 6/06) |
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2-Digit Counter - This article describes a 2-Digit Counter using a Microchip
PIC12F629. It shows what can be done with an 8-pin chip having just 5 output lines and
one input line. The chip drives two7-segment displays and this would normally require
7 lines to drive the segments plus another one or two lines to select the
displays.....(circuit / schematic design added 2/07) |
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3 Digits Digital Volt Meter with PIC16F676 - This is simple 3-digits digital volt
meter.PIC16F676 used to read analog signal(voltage) and display the value on 3-digits
7-segment. You can apply similar principles to measure DC current with parallel R
shunt. ….(circuit design added 11/08) |
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3.3V Bus Switches for PC100/PC133 Dimm Switching - Pericom Semiconductor
Application Brief # 032 (app note added 02/05) |
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32 Bit Serial Receiver 57.6 K Baud TTL and CMOS - (electronic schematic / circuit
added 11/05) |
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32.768 Khz Oscillator using a Common Watch Crystal - Below are a couple circuits
you can use to produce a 32.768 KHz square wave from a common watch crystal. The
output can be fed to a 15 stage binary counter to obtain a 1 second square wave. The
circuit on the left using the 4069 inverter is recommended over the transistor circuit
and produces a better waveform. The single transistor circuit....(electronic circuit
added 10/05) |
