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0-5V PIC Voltmeter - Higher voltage can be measured with
resistor voltage divider …..... |
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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 - ..... |
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16 Bit PC Serial Port Receiver CMOS - This circuit was designed
to control a 32 channel Christmas light show from the PC serial
port. Originally designed with TTL logic, it has been simplified
using CMOS circuits to reduce component count. It is a fairly
simple, reliable circuit that requires only 4 common CMOS chips (for
8 outputs),.... [Bill Bowden's website] |
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16-bit adjustable reference uses 8-bit digital potentiometers -
25-Dec-03 Issue of EDN It may be easy to find a precision voltage
reference for your application; however, a programmable precision
reference is another matter. The circuit in Figure 1 yields a precision
reference with an LSB of 62.5 µV. The circuit is a 16-bit DAC using three
8-bit digital potentiometers and three CMOS op amps..... [Design Idea by
Bonnie Baker, Tucson, AZ] |
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2 chips simplify layout for high-end embedded control - 04/01/99 Issue of
EDN If you are considering using one of the 32- or 64-bit RISC µPs from
Integrated Device Technology (IDT], the company’s new RC32134 and RC64145
system-controller ICs (Picture] can make your job easier. The chips provide
synchronous-DRAM, memory, and I/O control; a PCI interface; and peripherals, including
UARTs, timers, and interrupt controllers. The 32134 for the RC32364 µP provides a
glueless interface to DRAM.....Page includes several designs. Scroll to find
this one..... [Design Idea by Graham Prophet] |
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2 DDS ICs implement amplitude shift keying - 25-Dec-03 Issue of EDN
Many communications systems, including RFID systems and cable modems, use AM
(amplitude modulation]. This Design Idea shows how two DDS
(direct-digital-synthesis] devices can implement AM and ASK (amplitude-shift keying]
over a range of frequencies. The AD9834 complete 50-MHz DDS IC (Figure 1] has a
current output, so you can easily sum the outputs of two orof them by connecting them
to a..... [Design Idea by Noel McNamara, Analog Devices, Limerick, Ireland] |
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2 gates and a microprocessor form digital PLL - 14-Apr-05 Issue of EDN
Low-frequency PLL needs just a processor and gates..... [Design Idea by Kenneth
Martin, TareTronics Inc, Corinth, MS; Edited by Brad Thompson] |
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2 Transistors Form Bidirectional Level Translator - 11/07/96 EDN-Design
IdeasThis example illustrates a translation from 5 to 3V, but it can accommodate
almost any other voltage levels, provided the logic-low levels are equal (usually0V].
Translations from 1 to 100V are possible, albeit rather slow. The key to this circuit
is the unusual cross-coupling of the emitters..... [Design Idea by Jim Hagerman, Nokia
Mobile Phones, San Diego, CA] |
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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. …..... |
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3.3V Bus Switches for PC100/PC133 Dimm Switching - Pericom Semiconductor
Application Brief # 032.....[App Note] |
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32 Bit Serial Receiver 57.6 K Baud TTL & 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..... [Bill
Bowden's website] |
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