Monday, April 18, 2011

HOT!TC Electronics

How to Protect Your Electronics From Heat

Executive Summary By Darrell Edward Smith

Tonysystem, - 1.0 INTRODUCTION

    * DVD Players

    * Gaming Systems (e.g., Playstation, X-Box, Nintendo, Wii, etc.)

    * Heat

    * Electrical Surge/Spike Events, and

    * Electrical Noise



    * How is Heat destructive to your electronics?

    * What can we do about heat - How to Protect Your Electronics from Heat and Extend the Operating Life of our Electronics?



2.0 HOW IS HEAT DESTRUCTIVE TO YOUR ELECTRONICS

Heat is an artifact of electronics. All electronic systems generate heat. Electronic systems accept electrical power (current and voltage) from the power line (via the electrical outlet). The remaining portion of this electrical power is converted into heat.



However, heat is also an enemy of electronic systems. Few things are more effective in reducing the operating life-time of an electronic system, than raising the operating temperature of the electronic circuitry within your electronic system. The impact of heat (in shortening the operating life) of your electronics is "huge".



3.0 WHAT CAN WE DO ABOUT HEAT?

As I mentioned earlier, all electronics generates heat.

3.1. REMOVING HEAT FROM THE ELECTRONICS

Many consumer electronic systems were designed with "Heat Removal" in mind. Some of these electronic systems (like desktop computers) contain "internal fans". These fans were designed into these systems so that they could blow air through the area in which the system electronics resides. Other electronic systems contain "vents" (in their outer case) to provide an "escape path" for heat. Make sure and have your appliances (like your Central Air Conditioning system or Heat Pump) serviced.

3.2 REDUCE THE AMOUNT OF HEAT THAT THE ELECTRONICS GENERATE IN THE FIRST PLACE

Another approach to protecting your electronics from heat is to take steps to try to prevent your electronics from generating excessive heat in the first place.     * I represents the amount of current flowing through an electronic system and



    * R represents the load impedance (or resistance) within this electronic system; and



The answer to this question is "Yes", an electrical system does require a certain amount of current and voltage (electrical power) to do its job. By using the TVSS components, you are eliminating this excessive current (due to noise, glitches, etc.) from the "power line" current, flowing into your electronic system.



1. You have decreased the amount of current flowing into your electronic system, (which is the "I" in the expression "I^2 X R") - which helps a lot to reduce the amount of heat that the system generates.

2. By reducing the heat that the electrical system generates, you are now lowering the ambient (or surrounding) temperature in which your electronics operates.

3. Lowering the ambient temperature will often times also reduce the load impedance/resistance in your electronic system (e.g., the "R" in this expression) as well.



QUESTION: How can you reduce the load impedance/resistance in an electronic system? Isn't that a design feature of the electronic system?     * Using TVSS components lower the amount of current flowing through your electronic system.

    * Lowering this current reduces the amount of heat that the electronic system generates.

    * This lowers the ambient temperature for the system electronics.

    * Lowering the ambient temperature also lowers the load impedance/resistance (R) within the electronic system.



Both the reduction of current (and the resulting reduction of the load impedance) would serve to significantly reduce the amount of heat that the electronics system will generates.



    * How to Protect Your Electronics from Electrical Surge/Spike Events

    * How to Protect Your Electronics from Electrical Noise



    * Electrical Surge/Spike Events, and

    * Electrical Noise



1. Use (and do not thwart) the "Heat Removal" features of your electronic systems



2. Use TVSS (Transient Voltage Surge Suppressor) components to regulate the amount of voltage (and in turn) current that is flowing into your electronic systems: Minimizes heat generation due to resistive loss.



Check my other post: Electronics circuit



HOT!Ultimate Electronics

 The Ultimate Electronics Gift

Executive Summary By John Granholm

Tonysystem, - So what will they watch TV on? A high definition TV is a must for any home entertainment system, and is an excellent addition to any household that enjoys movies, sports events, TV programs, and video games. Samsung, Sony, Panasonic, and Pioneer are all technologically-advanced companies with great selections of HD TVs in a wide range of prices.

For the home entertainment system buff that truly has it all, test drive Bang & Olufsen's 103-inch plasma TV, the largest high definition screen available. The sports fan in your life will be forever indebted to you once you present them with a Samsung 70 Series HD LCD monitor, which uses HD TV technology to produce the most crisp, clear image ever seen, on an otherwise standard-looking flat screen computer monitor.



Facts About the Ultimate Attenuator

Executive Summary By Gavin Cruise

This attenuator functions similarly with other attenuators such as the fiber attenuator, Weber attenuator, and digital attenuator. The attenuator provides signal load in an easy way for the amplifier's output transformer circuit.

The following are some of the features of the electronic device: 100 watt maximum output, non-stepped continuous volume controller, bedroom switch, true bypass switching, dual speaker output jacks, plexi switch,100 volts tap fixed alternating current (AC) output, quiet cooling fan, variable line level output, and an all-steel construction. Because it uses a load resistor with 30 ohm, the Ultimate Attenuator can receive signal loads of 4, 8, 16 ohms from the guitar's amplifier.

The attenuator's built-in low impedance power amplifier helps to achieve strong and high frequency response. The attenuator is also compatible with Mullard power tubes. The latest version of the Ultimate Attenuator is the Nude 24 position model.



Check my other post: Electronic music



Friday, April 15, 2011

Mini Audio Amplifier circuit by BC559-BC549

This is very small audio amplifier circuit which can be handled just with 1.5V DC battery. This circuit just need very small power to work.
The maximum output current is IP=VP/RL=62,5mA. If the transistor beta is B=150 then the maximum base current is about 400µA. This is quite much for an amplifier input so a preceding stage is very useful. IC designers normally would even build a 3 or 4 stage amplifier (and e.g. a 20 transistor bias circuit), but our PA should be as simple as possible. For maximum power gain in a direct coupled (best for low component count) amplifier the common emitter configuration is best suited, and a CB or CC stage is much worse. At low voltages a CC also has the disadvantage that the output voltage smaller than the input voltage by VBE. If you want to drive a CE stage from a CC stage you need an input voltage of 2·VBE»1,4V, which is nearly impossible form a single cell supply. Two CE stages are much easier to connect, but this makes feedback more difficult because the total amplifier will be noninverting. A solution will be a differential pair which has nearly the same characteristics like a single CE stage but features an inverting and a noninerting input. A further advantage is that the inherent temparature compensation makes the biasing more stable.

Source: http://www.weberconnect.de/nfpa2.htm

Digital Volume Control circuit with DS1669

This is digital volume control circuit which uses DS1669 as the main volume control. This is stereo volume control, you can use stereo push button switch for to control both channel by together.
source: http://audio-circuits.blogspot.com/2009/10/digital-volume-control-circuit-with.html

Sunday, April 3, 2011

picture of a transistor


picture of a transistor


transistor pictures
image transistor

transistor photo
photo transistor circuits

picture of transistor



Friday, April 1, 2011

SN14011J SN14020J SN248651T datasheet


SN14002J SN14011J SN14011J SN14020J SN14020J SN248651TSN248651T SN248651T- SN248651TSN24LC018 SN24LC018 SN5410W SN5410W SN5437N SN5437N SN5473N SN5473N SN5477J SN5477J SN5486JSN5486JSN5486J- SN5486J SN5495J SN5495J SN54C42AJ SN54C42AJ SN54F03AJ SN54F03AJ SN54F12AJ SN54F12AJSN54F21AJ SN54F21AJSN54F299J SN54F299J SN54F30AJ SN54F30AJ SN54F398J SN54F398J SN54F569J SN54F569J SN54H10AJ SN54H10AJSN54L121T SN54L121TSN54L374J SN54L374J SN54L93 SN54L93 SN54LS104 SN54LS104 SN54LS109W SN54LS109W SN54LS113 SN54LS113SN54LS122 SN54LS122SN54LS131 SN54LS131 SN54LS140 SN54LS140 SN54LS163W SN54LS163W SN54LS203 SN54LS203 SN54LS212SN54LS212 SN54LS221 SN54LS221SN54LS221/J SN54LS221 SN54LS230 SN54LS230 SN54LS302 SN54LS302 SN54LS311 SN54LS311 SN54LS320SN54LS320 SN54LS401 SN54LS401SN54LS410 SN54LS410 SN54LS500 SN54LS500 SN54LSO8J SN54LSO8J SN54S05 SN54S05 SN54S106J SN54S106JSN54S115J SN54S115JSN54S124J SN54S124J SN54S133J SN54S133J SN54S133J- SN54S133J SN54S142J SN54S142J SN54S151J SN54S151JSN54S160J SN54S160JSN54S205J SN54S205J SN54S214J SN54S214J SN54S223J SN54S223J SN54S232J SN54S232J SN54S241J SN54S241JSN54S241J- SN54S241JSN54S241J/883B SN54S241J SN54S250J SN54S250J SN54S304J SN54S304J SN54S313J SN54S313J SN54S322JSN54S322J SN54S331J SN54S331JSN54S340J SN54S340J SN54S403J SN54S403J SN54S412J SN54S412J SN54S421J SN54S421J SN54S520J SN54S520JSN7405AN SN7405ANSN7405N TI SN7405NTI SN7406N00 SN7406N00 SN7409AJ SN7409AJ SN74107 SN74107 SN74116 SN74116 SN74125SN74125SN74143 SN74143 SN7414N TI SN7414NTI SN74161 SN74161 SN74170 SN74170 SN74251 SN74251 SN7441ANSN7441ANSN7450N TI SN7450NTI SN7490AJ SN7490AJ SN74AC573M SN74AC573M SN74AC573MDWD SN74AC573MDWDSN74AS00 SN74AS00 SN74AS00- SN74AS00SN74AS86N SN74AS86N SN74AS95N SN74AS95N SN74CBTD3 SN74CBTD3 SN74F00N SN74F00N SN74F00N-SN74F00N SN74F04J SN74F04JSN74F04J/DC SN74F04J SN74F09NS SN74F09NS SN74F112DR SN74F112DR SN74F112DRE4 SN74F112DRE4SN74F13J SN74F13J SN74F21NE4 SN74F21NE4SN74F22J SN74F22J SN74F27NS SN74F27NS SN74F27NS J SMD SN74F27NS SN74F27NS(Tube) SN74F27NSSN74F28D SN74F28D SN74F30NE4 SN74F30NE4SN74F32MX SN74F32MX SN74F32MX U SMD(SOIC) SN74F32MX SN74F38DG4 SN74F38DG4 SN74F40J SN74F40JSN74F64D SN74F64D SN74F74DG4 SN74F74DG4SN74H11J SN74H11J SN74H20J SN74H20J SN74HA74 SN74HA74 SN74HC09 SN74HC09 SN74HC107M SN74HC107MSN74HC107M96 SN74HC107M96SN74HC107MD SN74HC107MD SN74HC125M SN74HC125M SN74HC125MD SN74HC125MD SN74HC27 SN74HC27SN74HC373H SN74HC373H SN74HC373HDW SN74HC373HDWSN74HOOJ SN74HOOJ SN74JS09J SN74JS09J SN74KS13N SN74KS13N SN74LC14 SN74LC14 SN74LC32 SN74LC32SN74LS 03N SN74LS03NSN74LS 30N SN74LS30N SN74LS01P SN74LS01P SN74LS03N SN74LS03N SN74LS03N- SN74LS03N SN74LS03N(9601*25 9414*7) SN74LS03N SN74LS03N MOT SN74LS03NSN74LS03N TI SN74LS03N SN74LS03N/NEW SN74LS03N SN74LS04M SN74LS04M SN74LS07J SN74LS07J SN74LS12NSN74LS12N SN74LS12N- SN74LS12NSN74LS12N TI SN74LS12N SN74LS12N/NEW SN74LS12N SN74LS16J SN74LS16J SN74LS21N SN74LS21N SN74LS21N-SN74LS21N SN74LS21N MOT SN74LS21NSN74LS21N TEXAS SN74LS21N SN74LS21N TI SN74LS21N SN74LS21N(PDIP) SN74LS21N SN74LS21N/NEWSN74LS21N SN74LS25J SN74LS25J SN74LS30N SN74LS30NSN74LS30N- SN74LS30N SN74LS30N MOT SN74LS30N SN74LS30N TI SN74LS30N SN74LS30N(PDIP) SN74LS30NSN74LS30N/NEW SN74LS30N SN74LS38240DBR SN74LS38240DBRSN74LS38244 SN74LS38244 SN74LS38244DB SN74LS38244DB SN74LS38244DBR SN74LS38244DBR SN74LS38245SN74LS38245

no datasheet now


SM532044082X3S6 datasheet

SM037D1BRBHK1TB
SM037D1BRBHK1TB
SM1VR470MQPN0812
SM1VR470MQPN0812
SM532044082X3S6/8117405B60
SM532044082X3S6
SM532044082X3S6/MT4C4M4E8DJ
SM532044082X3S6
SM532044082X3S6/TC5117405CS
SM532044082X3S6
SM681000LLP07
SM681000LLP07SMCG18A-HE3/57T
SMCG18AHE3