Most popular links at ePanorama.net

1. Tips, Tricks & Gadgets from the Technicians themselves Hits : 23496
2. ATX power supply schematic Hits : 21402
3. Beyond Logic PC serial port interfacing documents Hits : 19331
4. Brystom Power Amplifiers Circuit Diagrams Hits : 17544
5. Simple 200W amplifier Hits : 16985
6. Ampli MOSFET 360W - This is a circuit for 360 W rms 8 ohms or 550 Wrms 4 ohms powerful amplifier. The plans are available in English and French. Hits : 16302
7. Crest Audio LT Series LT100, LT1500 and LT2000 Schematic Set - A commercial Class D Amplifier, complete schematics in pdf format. Hits : 15944
8. PC IR Remote Control Hits : 15778
9. Video and TV technology page at www.epanorama.net - very many video technology information links Hits : 14351
10. Electronics circuit designs by Tomi Engdahl Hits : 14037
11. P400 hi-fi high end audio power amplifier - amplifier with 382W to 8 ohms power rating, can drive speakers at 2-16 ohms range Hits : 12908
12. PSS - amplifiers, monitors, crossovers Hits : 12573
13. Printer Port interfacing 1 - Schematics for a simple printer port project . Includes code for Visual Basic , QBasic , C and C++. Hits : 12392
14. Taming the Composite, S-Video, Component and RGB Jungle - information on different video interfaces used in DVD players Hits : 12372
15. Universal IR Controller for a PC - This simple circuit allows you to record any IR remote control signal on your PC, and then play it back. This is particularly useful if you want to control appliances such as TVs, VCRs, CDs etc. from your computer. The device simply connects to the parallel port of your PC. You can also use this circuit to analyze the waveform from any IR remote control. This circuit was originally published in Electronics Australia, September 1998. Hits : 11820
16. Basic Motor Control Schematics Hits : 11794
17. Ampli MOSFET - DIY high power MOSFET amplifier 200 Wrms 8 ohms - 350 Wrms 4 ohms Hits : 11673
18. A Serial Infrared Remote Controller - a simple, cheap device that can be connected to any serial port to control most components that have infrared remote controls, includes schematics for receiver and transmitter Hits : 11588
19. NTSC (YC/RGB) to VGA RGB Scan Converter - This is a scan converter that converts NTSC signal (TV,VCR,LD or DVD) to VGA signal to output VGA monitor. Hits : 11503
20. Scart Connector Hits : 11282
21. ATX /ATX12V Power Supply Design Guide - version 1.3 Hits : 11111
22. Computerized Infrared Remote - control your stereo, TV and VCR from Windows, includes schematic and software Hits : 10840
23. 50 Watt Amplifier - easy to build general purpose 50 watt amp Hits : 10363
24. Bridge/Parallel Amplifier (BPA-200) Documentation - This document provides a 200W audio amplifier solution using multiple LM336s and and design concept to reach even higher output power levels. Hits : 10291
25. Cheap thingies to help you make some racket - small amplifier circuits using many amplifier ICs, from few watts to 200W Hits : 10252
26. A Microcontroller Based Motor Speed Control / Light Dimmer - article with theory and circuit Hits : 10091
27. Parallel port interfacing made easy Hits : 10081
28. Simple circuit and program to show how to use PC parallel port output capabilities - includes instructions how to connect a relay to PC parallel port Hits : 10081
29. VGA to TV converter Hits : 10018
30. Car amplifier information and schematics Hits : 10001
31. Analog Music Zone Guitar Effects Schematics - guitar effects, compressors, microphones and effects Hits : 9809
32. Build a Class-A Amplifier - This is an amplifier design made by Nelson Pass publishes at 1977. This amplifier gives out 20 watts per channel into 8 ohms, 24 watts into 6 ohms, and 28 watts into 4 ohms. The amplifier is powered from 120V AC power. Hits : 9795
33. RC5 Codes List Hits : 9739
34. How to build a simple but cool IR (Infra Red) receiver - This is a step by step guide to build a serial infrared receiver for your computer, with many pictures and detailed instructions. This circuitry allows you to control your computer with a simple remote, like the one you already use for your TV-set. You can use LIRC for Linux or WinLIRC, the windows port as the control software. Hits : 9602
35. Korkeallatuinen stereovahvistin 2 x 220W - This is a builging plan for an audio amplifier with 2 x 220W output power. Text is in Finnish. Hits : 9587
36. Infa-Red Remote Control - simple circuit which controls one relay output Hits : 9569
37. Infra Red Remote Control Extender Hits : 9547
38. 60 Watt Into 8 Ohms Power Amplifier - a simple amp to build, uses commonly available parts and is stable and reliable Hits : 9473
39. ATX Motherboard Power Hits : 9400
40. Car Audio Schematics - car amplifiers Hits : 9366
41. Inside TV Remote Control - The remote control's job is to wait for you to press a key, and then to translate that key-press into infrared (pronounced "infra-red") light signals that are received by the TV. When you take off the back cover of the control you can see what is inside it. Hits : 9191
42. ATX12V Power Supply Design Guide - version 1.3 Hits : 9124
43. DC Motor Speed Controller - Control the speed of any common DC motor rated up to 100V (5A). Operates on 5V to 15V. Uses NE556 to pulse-width modulate a high current switching power transistor, TIP122. In this way motor torque is maintained. Adjustable speed control. Hits : 9044
44. 3 Transistor Audio Amp (50 milliwatt) - Here is a little audio amplifier similar to what you might find in a small transistor radio. Hits : 9028
45. The Next to Minimal InfraRed Transmitter for PC - The Next to Minimal InfraRed Transmitter for PC was designed for a specific purpose: to invoke the 'Easy Startup Menu' of a SONY AV equipment, whose remote control is missing. No soldering iron, nor a oscillator was available - only one spare part infra red LED and a couple of hours. The solution was obvious - the infra red LED could be inserted to the parallel port, and both the carrier and modulator produced by software. Hits : 8992
46. 24 Line Parallel Interface for the PC - big file in pdf format, you might only need the Hits : 8932
47. ATX Power Supply Power-On Switch Hits : 8836
48. Notes on Video Conversion - how to convert video signals from different sources and connectors Hits : 8775
49. SDS Labs Schematics - solid state class A amplifiers Hits : 8769
50. SDS Labs Headphone Amp - solid state amplifier Hits : 8769
51. SDS Labs Schematics - solid state class A amplifiers, headphone amplifier, vacuum tube amps Hits : 8769
52. Remote Control Lighting - IR transmitter, receiver, switch and light dimmer Hits : 8495
53. 40 kHz TV-VCR light source repeater - designed to be placed directly in front of a standard TV or VCR remote to amplify the IR pulses to 10 timers stronger to operate a TV or VCR over three times the normal distance, pdf file Hits : 8455
54. IR Remote control repeater circuit - also information about computer interfacing Hits : 8426
55. Audio Preamp - simple preamp for electric guitar or microphone Hits : 8391
56. Interfacing to the IBM-PC Parallel Printer Port Hits : 8391
57. Do It Yourself Car Amplifier - This article is for those who wants to make their own car amplifier. The basics of calculation will be discussed below. If you have understand it you will be able to make car amplifier based on Hits : 8338
58. Circuit makes simple high-voltage inverter - A simple high-voltage MOSFET inverter solves the problem of driving a high-side MOSFET, using a low-voltage transistor. You can drive the circuit with a single CMOS gate. This circuit is probably the simplest high-voltage inverter you can design. It has served in thousands of three-phase motor drives from 0.37 to 0.75 kW. Hits : 8315
59. Equalized Passive Preamplifier Hits : 8314
60. Build your own "2-Wire LCD Interface" using the PIC16C84 microcontroller Hits : 8189
61. Building a dc to ac converter - Otherwise known as a dual axis drive corrector, this unit is intended to provide 240 volts/50 Hz (or 120 volts/60 Hz with minor modifications) for a right ascension (ra) drive and a reversible declination motor. The supply requirement is from 11 to 16 volts d.c. at 500 mA. The overall output frequency is adjustable from 47.5 Hz to 52.5 Hz or from 40 Hz to 60 Hz on the remote unit. This frequency is stabilised against voltage or temperature change. Hits : 8171
62. How PC Power Supplies Work - This article tells basics how PC power supplies work. Hits : 8166
63. How Electric Motors Work - Electric motors are everywhere! In your house, almost every mechanical movement that you see around you is caused by an AC or DC electric motor. By understanding how a motor works you can learn a lot about magnets, electromagnets and electricity in general. In this edition of HowStuffWorks you will learn what makes electric motors tick. Hits : 8161
64. 200W ATX PC Power Supply Circuit Hits : 8094
65. 3 phase A.C. Motor Windings and Connection Hits : 8011
66. High Quality Sound Mixer - very ambitious and expected to be very expensive mixer project, modular design Hits : 8001
67. Oscilloscope for Windows - Oscilloscope for Windows is a Windows application that converts your PC into a powerful dual-trace oscilloscope. Oscilloscope uses your PC's sound card as an Analog-to-Digital Converter (ADC) to digitize any input waveform (speech, music, electric signal, etc.) and then presents it on the monitor in real time, allowing the user to control the display in the same way as on a conventional "standalone" scope, for example change gain, timebase or plot Lissajous patterns. Any soundcard can be used and data can be exported to Windows clipboard if needed. Software supports up to 20 kHz bandwidth, triggering and spectrum analyzer. Hits : 7983
68. Connecting your PC to your TV-set - On this page I'll show you the possibilities on how to connect you PC to your TV-set. This page covers videocards made by ATI and nVidia. Hits : 7980
69. Circuits for the Hobbyist - many quite simple circuits Hits : 7896
70. S-video to composite video adapter Hits : 7881
71. Collection of IR circuits - IR remote transponder, 40 kHz clock, night scope, IR remote decoding Hits : 7798
72. 12 Channel IR Remote With Relay Board - This kit comprises a commercial 14-button remote control unit and a 12 channel relay board. This makes it very simple to add infrared remote control to any project or existing equipment. This page has a document that has complete details, including schematic and theory of operation. Hits : 7772
73. TDA7294 - The TDA7294 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers,Topclass TV). This IC datasheet gives example circuit for up to 100W amplifier using this IC. Hits : 7739
74. 40 kHz light receiver is immune to ambient light - you can achieve a range of several hundred feet with a standard TV or VCR remote control module, pdf file Hits : 7704
75. Bob Blick's Projects for Students and Hobbyists Hits : 7619
76. Renkus-Heinz Schematics Hits : 7611
77. 230V AC motor controller - controls speed of 230V AC universal motor, in pdf format, text in Finnish Hits : 7550
78. 4 - Channel Digital Logic Analyzer and 5 Channel Digital Oscilloscope by using PC Parallel Port Hits : 7538
79. Phillips RC5 infrared remote protocol page - Most audio and video systems are equipped with an infrared remote control. A common used standard protocol for infrared data communication is the RC5 code, originally developed by Phillips. Hits : 7533
80. Beyond Logic - PC interfacing projects Hits : 7490
81. Sony remote control protocols information Hits : 7477
82. Basic Principles of Video - good introduction chapter from A Technical Introduction to Digital Video book Hits : 7466
83. Programming your Universal Remote Control - Lost your manual? Can't figure out how to change the settings on your universal remote control? This webpage is a list of IR remote controller programming resources plus other online locations that offer help on programming various remote controls. Hits : 7440
84. A Guide to Semiconductors Hits : 7435
85. 100W Guitar Amplifier - Guitar amplifiers are always an interesting challenge. The tone controls, gain and overload characteristics are very individual, and the ideal combination varies from one guitarist to the next, and from one guitar to the next. There is no amp that satisfies everyone's requirements, and this offering is not expected to be an exception. This amp is rated at 100W into a 4 Ohms load, as this is typical of a "combo" type amp with two 8 Ohm speakers in parallel. Hits : 7419
86. The Leach SuperAmp - 270 watt Double Barreled Amplifier published in Audio magazine Hits : 7379
87. A Better Volume Control - use linear potentiometer and one tran resistor to make almost logarithmic response curve Hits : 7356
88. IR Control — The Invisible Frontier - Today both IR (Infrared) signals are used throughout the A/V industry for communications and control Hits : 7339
89. Electronic Design Software - Pspice, PADS, autocad PCB extensions, and other software Hits : 7335
90. Do-it-Yourself VGA to YPrPb Cable - This circuit is designed to convert 60Hz VGA (480p) from a computer's VGA port and drive progressive-component outputs to an HDTV (or similar display device). This circuit converts the RGB colorspace into YUV and translates the HV syncs to the Y signal. Hits : 7321
91. Stepper motor controlling using PC parallel port - and links to stepper motor documents Hits : 7289
92. WinCircuit 2002 - shareware program for drawing of a printed circuit in simple or double-sided in manual or automatic routing Hits : 7063
93. PC power supply connectors - AT power supply connector pinout and information Hits : 6988
94. Decoding IR remote controls - There are at least two international standards which are used by remote controls to encode the commands, the RC5 and RECS 80 code. This documenent has informtion on them and how to receive IR remote controller signals. Hits : 6979
95. ATX Power/Cooling - ATX power supply is different from AT power supply. It depends a logic circuit on the motherboard to turn it on. Hits : 6947
96. 101 Science Software Links - links to simple programs for different electronics calculation tasks Hits : 6813
97. A Basic Introduction to Filters - application note on active, passive and switched capacitor filters, document in PDF format Hits : 6749
98. SCR Oscillator - Silicon controlled rectifiers (SCR) can easily oscillate if there is an inductor (a speaker coil in this case) which gives just enough extra voltage to completely switch off the sustain current. In this way a new cycle may start and oscillations set in. It operates over a wide range of supply voltage and components values are not critical at all. Operational frequency in this circuit goes from 100Hz at 11V to 10KHz at 100V. Hits : 6710
99. 0-30 VDC Stabilized Power Supply With Current Control 0.002-3A - This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The circuit also incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of three amperes that the circuit can deliver. This feature makes this power supply indispensable in the experimenters laboratory as it is possible to limit the current to the typical maximum that a circuit under test may require, and power it up then, without any fear that it may be damaged if something goes wrong. There is also a visual indication that the current limiter is in operation so that you can see at a glance that your circuit is exceeding or not its preset limits. Hits : 6671
100. Recycling Obsolete Computer Power Supplies: Computer Power Supplies Contain Useful Parts - There are many parts in old computer power supplies that are useful in electronics projects. Hits : 6666
101. 200W ATX PC Power Supply Circuit - This is a wiring diagram of PCs power supply of DTK company. This power supply has ATX design and 200W performance. This power supply circuit uses chip TL494. Similar circuit is used in the most power supplies with output power about 200W.Device use push-pull transistor circuit with regulation of output voltage. This circuit is designed to be switchable between 230V and 115V input voltages. Hits : 6663
102. The PC's Parallel Port - FAQ, IEEE1284, software, chips Hits : 6660
103. Serial Infrared Controller - zipper demo file from Hits : 6638
104. How to use your RS232 or IRDA port for Remote Control Hits : 6616
105. H-Bridge - This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first. Using bigger parts could make it more powerful. Hits : 6435
106. Basic Stepping Motor Control Circuits Hits : 6382
107. Sam's Schematic Collection - various schematics and diagrams Hits : 6380
108. QSC Audio - PA amplifier, signal processing, controlling Hits : 6378
109. Simple PC smartcard reader Hits : 6364
110. Control of Stepping Motors, a tutorial - what you neet to know about stepper motors, also at Hits : 6363
111. Electric - free electrical CAD system from Hits : 6338
112. Robot Building Lessons Hits : 6324
113. Build A Video Switcher - Automatically or manually switch the outputs from up to four cameras into one video monitor, pdf file Hits : 6263
114. MiscEl - program to handle many different simple electronic calculations. This includes: ohms law, dB, charge curves, Wires, Fan cooling, PCB, color codes, thermo sensors, leds circuit, Fo, Serial/Paralle of R/C/L, and some more. The program is free to download and use, but the program is timelocked. A new version will have to be downloaded after about 1/2 year. Hits : 6151
115. Electronics Workbench Hits : 6141
116. Low distortion audio amplifier - ultra-low distortion 30W power amp Hits : 6091
117. Chip Directory - IC info database Hits : 6036
118. IR Remote Control Tester - measures the relative intensities of different Infra red light sources Hits : 5991
119. The Leach Amp - 120W power amplifier, latest update of the "Low TIM Amplifier", claimed to be a very good sounding design Hits : 5898
120. CircuitMaker - free limited version of a commercial circuit design package available Hits : 5840
121. Three-phase power regulator - This three-phase linear power regulator can control resistive loads or induction motors. Drive outputs are optoisolated and regulation from zero to full load is via a single potentiometer so interfacing to a PC should be easy, assuming all mains isolation is properly implemented. Hits : 5837
122. Musical Instrument Tube Amp Building, Maintaining and Modifying FAQ Hits : 5777
123. El-Cheapo - A Really Simple 60W Power Amplifier Hits : 5768
124. Cheap 100 to 150 Watt Amp - Here is a simple and cheap amp to make Hits : 5768
125. Audio compressor - A circuit for a single-channel audio compressor using a JFET to control the gain of a vitual earth amplifier. Hits : 5684
126. Remote Control Extender Mk1 - Originally published in Electronics in Action, January 1994 Hits : 5633
127. Davshomepage - Information about Infrared codes, I2C bus, pic16F84 kits, and other electronic stuff. Hits : 5631
128. eCircuit Center - A free source of SPICE circuit files and tutorials for the hands-on learning of electronic circuits. Circuits you can design, test and modify using the SPICE simulator: Opamps, filters, sensors, PID controllers, etc. Hits : 5627
129. Power Good Signal - how AT power supply "power good"-signal works Hits : 5601
130. Educational Resources for Electronics Technology - Educational software for learning electronics basics. Trial software can be downloaded. Hits : 5572
131. Transistor Cross Reference Database - database currently has over 40,000 transistors in it which can be cross-referenced to other parts, you can also Hits : 5557
132. 0 - 300V Adjustable Power suppy for safe experimenting - This simple circuit which can provide an adjustable voltage source of 0 to 330 Volt. This supply is short-ciruit proof: the current is limited to about 100mA. Hits : 5550
133. Dimmer with AC motor? - Normal light dimmers may have some problems with an inductive load, such as a motor. Essentially, the dimmer works by chopping bits out of the AC waveform. Inductors, like the coils in a motor, dislike having the current through them changed abruptly, and produce large voltage spikes which can cause the triac to self-trigger or burn if not properly taken care of. This article tells how to do this. Hits : 5547
134. A DIY Headphone-Amplifier with Natural Crossfeed - The in-head localization phenomenon of the headphones does not please many people. A "natural" crossfeed from the right (left) audio signal to the left (right) transducer, with an appropriate attenuation and delay, will reduce most of the adverse symptoms of headphone listening considerably. Hits : 5540
135. Simple audio mixer for mixing signal from two soundcards Hits : 5516
136. High-Performance Audio Applications of The LM833 - RIAA phono preamplifier stages and active crossover networks Hits : 5441
137. PC Remote Control - This software that lets you remotely control your computer from the serial port (RS-232). This software works with many IR receivers, including commercial and homebuilt design. This software works also with IrDA-compliant transceiver module with ASK/TV Remote compatibility. Hits : 5438
138. PIC Microcontroller Projects - collection of projects and tutorials Hits : 5363
139. 8 Watt Audio Amp - based on LM383 Hits : 5322
140. Background on the ATX power supply Hits : 5295
141. 2.4 GHz FM ATV - a project concept - This article describes how to modify consumer wireless video link devices for ATV use. Hits : 5280
142. Single Chip 50 Watt / 8 Ohm Power Amplifier - uses LM3876 hifi amplifier IC from National Semiconductor Hits : 5279
143. First PICMicro Project Hits : 5277
144. Home Made 3 Phase - one way to generate 3 phase power from single phase supply to run three phase electrical motor Hits : 5266
145. Motherboard Power Connector - AT power supply pinout Hits : 5259
146. AirBorn Electronics Circuit Design Library - microcontroller circuits Hits : 5254
147. EPROM emulator - data loading usign PC parallel port Hits : 5217