µC implements Pushbutton Light Dimmers: 06/18/98
EDN-Design Ideas |
10 Tricks for Interfacing to the PIC16C508:
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101 AT Keyboard to ASCII Decoder: The Host to
Keyboard Protocol is initiated by taking the KBD
data line low. However to prevent the keyboard from
sending data at the same Time that you attempt to
send the keyboard data, it is common to take the KBD
Clock line low for more than 60us. This is more than
one bit length. Then the KBD data line is taken low,
while the KBD clock line is released. |
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12C508 Smart Lock: The base sends a data
sequence (the password) which is recognized by the
key. The key checks the sequence and -if it
recognizes it -sends to the base another data
sequence, as an answer to the password. At the Time
when the base gets a correct answer (which means
that the key has been introduced), the relay is put
into action, and it can command a number of
consumers. |
2 Wire LCD Interface using PIC16CF84:
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27c801 EPROM Programmer Project:
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40+ MHz 5 Digit Frequency Counter With An AVR 2313: |
50 MHz Frequency Counter, Voltage Meter & SWR/PWR
indicator: |
68HC11 Based RDS Decoder: |
68HC11 Function Generator: |
68HC11 Instruction halts External RC Clock:
04/27/95 EDN-Design Ideas |
68HC11 Stepper Motor Control:
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68HC11 Stepper Motor Control:
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68HC11 Synthesizes Accurate Sine Wave: 09/02/96
EDN-Design Ideas |
8051 Development System Circuit Board: |
8051 Development System Circuit Board:
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8088 Maximum Mode SBC: |
About PIC Microcontrollers: |
AC Lamp Dimmer for Basic Stamp:
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AC Vias Can Improve Decoupling: 04/28/03
Electronic Design - Ideas for Design / Good
decoupling is nearly always essential in a world of
mixed-signal designs that exhibit increasing speed,
performance, and component density. There are cases,
though, where proper decoupling is absolutely
critical if the circuit is to deliver its.. |
Acceleration Monitor using ADXL202 and AVR
AFSK 1200 Modem Based on PIC16C620:
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Analog input circuit serves any microcontroller:
12/20/2001 EDN - Design Ideas / The simple ADC in
Figure 1 is perfect for getting analog signals into
a purely digital microcontroller. Using just five
surface-mount parts, you can assemble it for less
than 50 cents (1000), which is approximately half
the cost of a single-chip-ADC approach in the same
volume. Moreover, this design takes only one pin
from the microcontroller to operate. . |
Analog to Digital Conversion Notes for PIC Processor:
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AT89C2051 / 4051 Driving Dot LED:
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AT89C2051 / 4051 Easy Downloader: |
AT89C2051 / 4051connecting Dumb Terminal:
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AT89C2051 / 4051scanning 7 Segment Display & Keypad:
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AT89C2051 / 4051Stepper Motor Interface: |
AT89C2051 Digital Thermometer & Clock:
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AT89C2051 Line Follower Robot:
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AT89C2051 Night Light Saver: |
AT89C2051 Real Time Controller:
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AT89C2051 Serial Coms to LED Driver:
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AT89C51 / 52 / 55 Easy Downloader: |
AT90S8515 Experimenter Board:
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Atmel 8051 Flash Based Microcontroller Programmer: |
Atmel 89C Series Flash Microcontroller Programmer:
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Atmel AVR Programmer: |
AVR Based Serial Port IR Receiver:
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AVR Beacon Super Keyer: |
AVR Digital Voltmeter: |
AVR Frequency Counter: |
AVR microcontroller makes improved motor controller:
10/17/2002 EDN - Design Ideas / The circuit in
Figure 1 provides a novel method of reading the
pulse train using an Atmel (www.atmel.com) AVR
processor, from a typical radio-controlled receiver,
and to determine the velocity of a motor. To capture
the pulse train from a typical receiver, you need an
external interrupt that triggers based on a rising
and a falling edge.. |
AVR Signal Generator: |
Basic Stamp Computer Eases Prototyping hassles:
04/09/98 EDN-Design Ideas |
Basic Stamp Interface Circuits:
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Basic Stamp Lightning Activity Monitor:
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BASIC Stamp Thermoelectric Cooler:
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Build a PIC Controlled DDS VFO, 0 to 6 MHz: |
C 52 EVB Robot Controller: |
Circuit Controls Two LEDs With One Microcontroller
Port Pin : 04/01/02 Electronic Design - Ideas
for Design /Microcontroller port pins can typically
be driven either high or low, or else be put into an
"input" or high-impedance state. This circuit uses
the three states to drive two separate LEDs with one
port pin. This can be very useful when there are
no... |
Circuit provides watchdog for microcontrollers:
12/26/2002 EDN - Design Ideas / The watchdog
circuit in Figure 1 uses a single NAND
Schmitt-trigger IC. The circuit is more
cost-effective than dedicated, commercially
available watchdog ICs. The circuit generates an
active-high reset signal upon power-up and remains
in a low state as long as the control input receives
pulses. Whenever the pulsing at the control input
stops, whether the circuit is in a high or a low
state, th.... |
Closed Caption Decoder: This is a closed-caption
decoder with serial output, based on a PIC16C71, an
Élantec EL4581C sync separator, and an LM393 dual
comparator (for data slicing with automatic
threshold). |
Combination Lock (PIC16F84):
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Connecting LED to PIC Micro I/O Pins:
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Connecting PIC12C508 8 to 93AA46 Serial Eprom:
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Controller Provides Multiple Alarm Driver Formats:
01/15/98 EDN-Design Ideas |
Digital signal controls sine generator:
05/15/03 EDN-Design Ideas / The circuit of Figure 1
produces an accurate, variable-frequency sine wave
for use as a general-purpose reference signal. It
includes an eighth-order elliptic,
switched-capacitor lowpass filter, IC3, which uses a
100-kHz square-wave clock signal that
microcontroller IC2 generates. (Any other convenient
square-wave source is also acceptable... |
DS1820 Arbiter V2.00 Schematic:
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DS1820 Temperature Sensor Readout Unit: |
Dual PIC16C84 Prototype Board:
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Electronic Door Codelock With PIC16F84:
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Electronic Door Codelock: |
Embedded System to Send E Mails (small TCP/IP Stack):
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EZ80 Single Board Computer Schematic (Z80):
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Freign Vocabulary Recollector:
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FSK Modem With PIC16C84: |
Galvanic Decoupling of I2C Bus:
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Generate Video Signals: in real-time using a
PIC16F84 |
Generate Video Signals: |
Giant Money Counter (PIC16F876):
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GPS LCD Display Project: |
GPS Repeater: |
Graphic LCD Interface: |
High Efficiency Halogen Bike Light Dimmer: This
circuit uses a PIC16F84 microcontroller with some
software to control20-Watt12V DC halogen lamp
|
IC16F876 Datalogger: |
Infra/radio Remote Control Transmitter/receiver With
PIC: |
Interfacing DRAM to AT90S8515:
|
:
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Interfacing S 7800to PIC16F877:
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Interfacing thePIC16C508: |
JDM Programmer: |
KD7LMO Micro Beacon (PIC18F252):
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Key reading circuit saves I/O pins: 03/06/03
EDN-Design Ideas / Some microcontroller applications
usually use too many I/O pins to read keys or
onboard switches; in many cases, few pins remain
available for other uses. Some alternative ways to
read keys yield more free pins. First, consider some
ways to effect key reading. Table 1 presents a
comparison of four methods with references to
circuit configurations (figures 1, 2, 3, and 4) |
Kodak DC 20 Camera Interface (PIC12C509): |
Kodak DC 20 Camera Interface (PIC16F84):
|
LCD Serial Terminal: |
LCD to PIC16C54 Schematic: |
Low Cost Digital Thermometer Uses SingleChip
Microcontroller : 02/18/02 Electronic Design -
Ideas for Design / In many applications, the ability
to read and display temperature is either desirable
or an absolute requirement. Some of these
applications include temperature probes,
thermostats, CPU monitors, and process-control
equipment. The ... |
Low Voltage Reset operates Below 2.7V: 03/26/98
EDN-Design Ideas |
Mains Clock Controller using AT89C2051:
|
Make a DAC with a microcontroller's PWM timer:
09/05/2002 EDN - Design Ideas / Many
embedded-microcontroller applications require
generation of analog signals. An integrated or
stand-alone DAC fills the role. However, you can
often use PWM signals for generating the required
analog signals. You can use PWM signals to create
both dc and ac analog signals. This Design Idea
shows how to use a PWM timer to simultaneously
create a sinusoid, a ramp, and a dc voltage.. |
Make noise with a PIC : 08/07/03 EDN-Design
Ideas / Building a stable noise generator for
audio-frequency purposes requires only a few
components. The circuit in Figure 1 relies on
linear-feedback shift registers and some simple
software. An eight-pin Microchip (www.microchip.com)
PIC12C508 controller (IC2) with a short program
generates pseudorandom noise at its output pin,
GP0.... |
Microchip PIC ICD (in Circuit Debugger):
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Microchip PIC ICSP implementation:
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Microcontroller Becomes Multifunctional:
10/25/01 EDN-Design Ideas / PDF contains multiple
circuits - scroll to find this circuit. |
Microcontroller directs supply sequencing and
control: 05/29/03 EDN-Design Ideas / With the
proliferation of dual-voltage architectures and
multiprocessor boards, even simple applications can
require several processor voltage rails. With each
processor having its own power-up and down
requirements, power-rail sequencing and control can
become a complex task. The challenge for
power-supply designers is to consider each
processor's timing and voltage requirements and
assimilat.... |
Microcontroller discerns addresses in RS 485 systems:
11/08/2001 EDN - Design Ideas / One of the many
benefits of using the RS-485 data-interface system,
unlike the RS-232 system, is its ability to
implement multidrop networks. Such networks usually
carry 9-bit data words, in which the ninth (parity)
bit identifies each word as address or data. When
using small microcontrollers without a hardware UART,
such as IC1 in Figure 1, designers must decide
whether to add an exte... . |
Microcontroller emulates numerically controlled
oscillator: 02/21/2002 EDN - Design Ideas /
Microcontrollers commonly add intelligence or
digital functions to products, but they can also
provide a variety of analog signals. An 18-pin PIC
16C54 microcontroller, combined with an inexpensive,
8-bit DAC and a simple lowpass filter, can generate
sine waves from dc to approximately 50 kHz with a
tuning resolution of 24 bits. . |
Microcontroller emulates numerically controlled
oscillator: 02/21/2002 EDN - Design Ideas /
Microcontrollers commonly add intelligence or
digital functions to products, but they can also
provide a variety of analog signals. An 18-pin PIC
16C54 microcontroller, combined with an inexpensive,
8-bit DAC and a simple lowpass filter, can generate
sine waves from dc to approximately 50 kHz with a
tuning resolution of 24 bits. . |
Microcontroller Interface for 5KWatt Microwave oven:
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Microcontroller Makes Effective Frequency Counter:
11/23/00 EDN-Design Ideas / PDF contains multiple
circuits - scroll to find this circuit.
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Microcontroller Multi Channel Light Dimmer:
|
Microcontroller MultiChannel Light Dimmer: The
project is a microprocessor-controlled multiple
channel lighting dimmer, that could be used in
theatrical and other applications. The device will
accept input from a wide range of interfaces: RS232
input, DMX512 (theatrical lighting standard) or
RS485, or a Musical Instrument Digital Interface
(MIDI). The device will control a number of lamps by
using some form of AC power control. The firmware in
the microcontroller will handle all functions, from
decoding the protocol on either of the input
interfaces through to Timing the firing of power
triacs for the output. |
Microcontroller provides SRAM battery backup:
06/26/03 EDN-Design Ideas / To maintain content in
the event of power loss, many designs that include
SRAM require a dedicated device that can
automatically switch from a standard power supply to
battery operation. Microcontrollers seldom find use
in power-switching applications. Because
microcontrollers typically operate from the primary
power supply, they stop execution if that supply
drops, thereby making it impossible.... |
Microcontroller selects minimum/maximum value:
09/20/2001 EDN - Design Ideas /
Microcontroller-based systems for measurement,
sensor-data processing, or control, sometimes
require you to determine a maximum or minimum data
value. For example, in an object-detection system,
such as a radar or sonar system, the microcontrolle. |
Microcontroller Sensor and Actuator Interfaces: |
Microcontroller Watches, Controls AC Power:
06/22/95 EDN-Design Ideas circuit allows an isolated
microcontroller to both sense and control ac power
to an externally plugged-in device
|
Microprocessor RS 232 Reset: |
Microprocessor RS232 Reset: |
MiniLOGGER V1.0: |
Mk2 PC Based EPROM Programmer:
|
MMC to PIC16F876 Circuit Diagram:
|
Multi Chip Programmer: |
Multimedia Electronic Crib: microcontroller
based light controller which generates sequence of
day-night with light fading, optional serial control
interface, based on 87C51 |
Network Time Protocol AVR Clock: |
Night Light Saver (PIC12C508): |
Nixie Clock (PIC16F876): |
No Parts PIC Micro Programmer:
|
One Microcontroller Serves Multiple External
Interrupts: 02/01/01 EDN-Design Ideas / PDF
contains multiple circuits - scroll to find this
circuit. |
Optical Sensor using PIC12C508:
|
PIC 18 Programmer (PIC18F458, PIC18F452, PIC18C252,
PIC16C745, PIC18F6620, PIC18F6720):
|
PIC 5x7 Display: |
PIC Based Keyboard Emulator:
|
PIC Based Motor Controller: |
PIC Based Packet Radio Encoder: |
PIC Based Robot: |
PIC Based Web Server: |
PIC Controlled DDS VFO, 0 to 6 MHz:
|
PIC Controlled DDS VFO, 0 to 6 MHz: |
PIC Demo Board: |
PIC ICD: |
PIC LCD and Keypad Driver: |
PIC Logic Probe With Pulser:
|
PIC Micro LED Projects: |
PIC Micro Multiple Servo Motor Interface:
|
PIC Micro Programmer: |
PIC Microcontroller Servo Motor Interface: |
PIC Programmer 2: |
PIC Programmer for Serial Port:
|
PIC Programmer: to download programs into PIC
microprocessors. |
PIC Programmers for Parallel Port:
|
PIC Project #1 RS232 to I2C Interface:
|
PIC Tetris Game: |
PIC Tock Video Clock: |
PIC X1 Schematic (PIC16F877):
|
PIC12C508 Night Light Saver:
|
PIC12C508 Phase Controller for 2kW heater:
|
PIC12C509 Gym Timer: |
PIC12C509 Logic gate Replacement for Nitrogen Filler:
|
PIC16C505 IR / Wireless Remote Control:
|
PIC16C63 MIDI Controlled Light Dimmer:
|
PIC16C84 VT 52 Emulator for Linux:
|
PIC16C84 VT 52 Emulator for Linux:
|
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