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40+ MHz 5 Digit Frequency Counter with an AVR 2313 - (electronic
circuit added 7/03) |
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5 Hints for Debugging MicroController-based Designs AN 1458 -
Agilent Application Note (added 6/06) |
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50 MHz Frequency Counter - This project is nice and small
frequency counter that reads frequency from 1 Hz to 50 MHz that I have
modified from original designed by Weeder Technologies . I have designed
new PCB to fit with 16X1 LCD and change source code for compatible with
new small PCB Specifications, Auto-ranging with floating decimal point.,
Up to 7 digits displayed on 1X16 LCD., Auto-adjusting gate speed (0.1 sec
to 1 sec)., Microcontroller-based circuitry provides for simplicity, ease
of assembly, and highly stable readout., Sensitivity approximately 100 mV
RMS (100 Hz to 2 MHz), 800 mV RMS @ 50 MHz., Input overload protected.
….(electronic schematic added 11/08) |
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50 MHz Frequency Counter Voltage Meter & SwR/PWR Indicator -
This is a successor of the PIC16C71 4-digit LED f-counter & V-meter. Some
hard to find parts used in the previous version, which are out of
production for some time, has been omitted. A rather early PIC16C71 has
also been replaced by 28-pin device PIC16F876.....(electronic Circuit
diagram added 05/07) |
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500W Power-Factor-Corrected PFC Converter Design with FAN4810/ AN-6004 -
Fairchild Application Notes / (app note added 6/06) |
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5V Logic Pulser is Battery Powered - 09/16/99 EDN-Design Ideas.....A
battery-powered, pushbutton-triggered TTL/CMOS-compatible source of debounced 5V logic
pulses is a simple but handy piece of test equipment to have in any tool kit (Figure
1]. The circuit's battery-powered operation complicates what would orwise be a trivial
exercise in switch-bounce and timing-Circuit design. The convenient use of battery
power..... [Design Idea by W Stephen Woodward, University of North Carolina, Chapel
Hill, NC] |
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60 minute PIC Count Down Timer - On this page, I will introduce the
Count-down timer with PIC16F84A. I am putting a count-down timer by the hardware on
Electronic Circuits Application Garage. The function of the timer is the same as it
approximately. (The stop switch is added) Because this unit was made compactly, the
wiring of the back becomes quite complicated …..... |
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6090 Digital Decoder Schematics - (electronic circuit added 4/05)
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68HC11 Function Generator - (electronic schematic / circuit added 11/05)
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68HC11 Instruction Halts External RC Clock - 04/27/95 EDN-Design Ideas Using
the circuit in Fig 1, a 68HC11 µP's stop instruction can put the µP's external
RC-oscillator clock, as well as the µP itself, into a low-power mode. On receiving an
interrupt, the µP will exit the stop condition and enable the RC clock. The RC clock,
being a low-Q circuit, will start up immediately. Crystal oscillators, on the other
hand, can waste precious milliseconds coming up to speed and stabilizing..... [Design
Idea by Allen Harstine, Micro Systems Engineering Inc, Lake Oswego, OR] |
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68HC11 Read Encoder - ….(design added 07/08/09) |
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68HC11 Synthesizes Accurate Sine Wave - 09/02/96 EDN-Design Ideas.....You
can use a 68HC11 and a 12-bit serial DAC (Figure 1) to generate accurate sine waves
without using floating-point arithmetic. Figure 2 shows a block diagram for this
sine-wave generator. You can easily analyze the generator's behavior by writing state
equations in the z domain. You can also write equations in the s domain. The location
of the two poles..... [Design Idea by Mika Maaspuro, Espoo, Finland] |
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68k Single Board Computer - (electronic circuit added 4/05) |
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68kSingle Board Computer - Build a 32-bit power single board computer. The
board fetures 68HC000 @ 8MHz, 256kB FLASH, 256kB SRAM. Available now schematic of
DTACK and decoder that use CPLD…. [Wichit Sirichote, kswichit@kmitl.ac.th] |
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8 Hints for Debugging MicroController Based Design - Agilent Application
Note.....[App Note] |
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8 Hints for Debugging Siemens MCU-based Designs - Agilent Application Note
(added 6/06) |
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8 pin µC forms one-chip Programmable VCO - 09/24/98 EDN-Design
Ideas.....The circuit in Figure 1 uses a Microchip 8-pin µC (PIC12C671]as a
voltage-controlled oscillator (VCO]. Because PIC12C671 has an internal 4-MHz
oscillator, four-channel 8-bit A/D converters, and built-in power-reset circuitry, you
need no external components to configure VCO. The µC reads two analog inputs
through AN0 and AN1.....multiple circuits, scoll to this one..... [Design Idea by
Yongping Xia, Teldata Inc, Los Angeles, CA] |
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8051 Development System Circuit Board #1 - (electronic circuit added 7/03)
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8051 Development System Circuit Board #2 - (electronic circuit added 4/05)
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8088 Maximum Mode SBC - (electronic circuit added 4/05) |
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89C2051 PROTO BOARD - This single sided proto board provides an
economical solution for developing and testing the projects around Atmel 20 pin series
u-controllers (89Cx051 & AVR)…. [M Asim Khan, asimkhan@sat.net.pk] |
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89C2051 Proto Board - This single sided proto board provides an economical
solution for developing and testing the projects around Atmel 20 pin series
u-controllers (89Cx051 & AVR)….(design 6/07) |
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8-Bit LPT Characterization & Qualification Data - Pericom Semiconductor App
Note # 007).....[App Note] |
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8-bit microcontroller implements digital lowpass filter - 24-Jan-08 Issue of
EDN A simple assembler routine fits a digital lowpass filter into a
microcontroller..... [Design Idea by Abel Raynus, Armatron International, Malden, MA] |
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9 Second Digital Readout Countdown Timer - This circuit provides a visual 9
second delay using a 7 segment digital readout LED. When the switch is closed, the
CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output
held high. When the switch is opened,… [Bill Bowden] |
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9435 PCI Performance Measurements-Concepts & Practical Application - Agilent
Application Note.....[App Note] |
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