Popular Electronics Articles

Architecture of 8051 Microcontroller

Block Diagram of 8051 Microcontroller Block diagram of 89C51 Pin Diagram of 89C51 Microcontroller <i ...

0 Comments. 5178 views since Jul 5, 2008

Interfacing Devices to 8051

LED Interfacing Making a LED Blink The first step is to build a simple circuit. At this point you should be familiar with the parts used. This design is intended for use with an Atmel 89s51 but also possible for others family 8051.< ...

3 Comments. 2395 views since Jul 5, 2008

Junction Diodes

There were some historic crude, but useable semiconductor rectifiers before high purity materials were available. Ferdinand Braun invented a lead sulfide, PbS, based point contact rectifier in 1874. Cuprous oxide rectifiers were used as power rectifier ...

0 Comments. 2391 views since Sep 28, 2008

Beam Circularizing and Astigmatism Correction Methods for Semiconductor Laser Diodes

Introduction The most commonly used method to circularize the elliptical beam is to use a pair of anamorphic correcting prisms, as shown in Fig.1. The prisms can enlarge or reduce the beam size in one direction while keeping the beam size in ...

0 Comments. 2167 views since Sep 22, 2007

Water Level Indicator

Introduction It is simple water level indicator which indicates the level of water. That alerts you, if level of water is overflowed. Circuit Diagram <h ...

4 Comments. 1615 views since Sep 27, 2007

2051 Microcontroller

 Microprocessor and Microcontroller Microcontroller was a by-product of the microprocessor development. The same fabrication techniques and programming concepts that make possible the general purpose microprocessor also yielded the micro ...

1 Comments. 1601 views since Jun 16, 2008

TETRA - Terrestrial Trunked Radio

TETRA - Terrestrial Trunked Radio for Professional Cellular System TETRA, the European standard for Trunked Radio Systems, is primarily intended for users in the public security sphere, transport, utilities and operators of public Trunked Radio ...

0 Comments. 1539 views since Sep 3, 2008

Temperature Sensor with Digital Output

This is a very simple Temperature Sensor. It uses LM35DT as a semiconductor Temperature Sensor which operates with a +5 volt DC. Circuit Diagram < ...

0 Comments. 1520 views since Sep 11, 2007

Infra Red Remote Control Extender

Description This circuit is used to relay signals from an Infra Red remote control in one room to an IR controlled appliance in another room. Forward I have seen these devices advertised in magazines, they sell for around £4 ...

4 Comments. 1497 views since Sep 27, 2007

Near Field Communication Interface & Protocol-2 (NFCIP-2)

Near Field Communication Interface and Protocol-2 (NFCIP-2) Brief history In 2002, Ecma International formed Task Group 19 of Technical Committee 32 to specify Near Field Communication (NFC) signal interfaces and protocols. The NFC devi ...

0 Comments. 1283 views since Sep 9, 2008