Rangkaian-Elektronika.Com » Computer

Mini Amplifier

admin — Wed, 17 Dec 2008 08:25:54 +0000

Here is another mini circuit project. This is a Mini Amplifier that have a simple tone control. Here is the Scheamatics

Mini Amplifier

You can comment here if get something wrong with this electronic schematic design

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Audio : Power Amplifier Circuit with 2N3055 Power Ampl

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Computer Audio Booster

admin — Fri, 18 Jan 2008 16:54:52 +0000

Here is a simple amplifier for boosting the audio level from low-power sound cards or other audio sources driving small speakers like toys or small transistor radios. The circuit will deliver about 2 watts as shown. The parts are not critical and substitutions will usually work. The two 2.2 ohm resistors may be replaced with one 3.9 ohm resistor in either emitter.

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Audio : Power Amplifier Circuit with 2N3055 Power Ampl

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Remote Control IR Transmitter Receiver

admin — Wed, 17 Oct 2007 14:57:27 +0000

Infrared Transmitter and Receiver schematic diagrams
Pyroelectric Infrared Sensor
Minimal Infrared transmitter for PC

Simple IR transmitter circuit
Simple infra-red detector
Infra Red Switch
IR remote control extender
IR Remote Control Extender Circuit (Mark 2)
IR Remote Control Extender Circuit (Mark 3)
IR Link
IR remote control tester
40khz IR Tester
555 timer 40khz IR Oscillator
IR detector / emitter
Fire-Stick infrared remote control
Simple infrared remote control
Infrared / Ultrasonic beacon
Implementing Infrared Object Detection
Computerized Infrared Remote

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PIC Microcontroller Programmer

admin — Thu, 11 Oct 2007 10:04:38 +0000

Optical Sensor using PIC12C508:

PIC 18 Programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, PIC18F6720):
PIC 5×7 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:
PIC16F84 Based Morse Code Reader:

PIC16F84 Countdown timer:
PIC16F84 CW Decoder:

PIC16F84 Debugging Terminal:
PIC16F84 LED Chaser:

PIC16F84 Line Following Robot:
PIC16F84 Line Following Robot:

PIC16F84 Miniature Real Time Controller:
PIC16F84 Programmer #2:

PIC16F84 Programmer:
PIC16F84 Pulse Monitor With Date/time Output (ZIP):

PIC16F84 Serial I / O Expander With PicBasic:
PIC16F84 Sound Controlled Christmas Lights:

PIC16F84 Stepper Motor Controller:
PIC16F84 tone Generator (6 Bit):

PIC16F84 tone Generator With Source Code:
PIC16F84 tone Generator:

PIC16F84 TrIAC / IGBT Brightness Phase Controller:
PIC16F84 Ultrasonic Range Finder Project:

PIC16F84 Web Server:
PIC16F873 Digital Clock:

PIC16F873 Remote Display:
PIC16F873 ultrasonic Range Meter:

PIC16F877 Programmer and Development System:
PIC16F877 to IDE Interface:

PIC18 Schematic:

PIC18F252 Bootloader Schematics:

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Microcontroller Design Programmer System

admin — Thu, 11 Oct 2007 09:26:13 +0000

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:
Microcontroller Makes Effective Frequency Counter: 11/23/00 EDN-Design Ideas / PDF contains multiple circuits – scroll to find this circuit.

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:

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Microcontroller Application LCD Microchip PIC

admin — Thu, 11 Oct 2007 09:23:35 +0000

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):

Microchip PIC ICSP implementation:
Microcontroller Becomes Multifunctional: 10/25/01 EDN-Design Ideas / PDF contains multiple circuits – scroll to find this circuit.