After a long pause it is time for something new in my simple web site. At some point in time I decided to build a pair of good speakers, which will be pleasant for listening and at the same time cheaper than a small car like many of those you can buy in audio store. I chose the notorious JX92s by Jordan. This small driver is widely used in DIY builds as well as in commercial speakers. After half a year of thinking over countless enclosure designs, I ended my search at Jordan’s website and the second generation 35″ MLTL.
Category: Projects
All of my personal project
Headphone Amplifier With TPA6120A
The following article is devoted to a HiFi headphone amplifier project of mine based on BurrBrown’s (Texas Instruments company now) integrated circuit TPA6120A . This IC consists of two high power operational amplifiers in one package. Both amplifiers have separate power supply pins, placed symmetrically on both sides of the package so developing a high density PCB will be easy. TPA6120 has impressive parameters, which make it fit the usage mentioned in its datasheet. The main parameters as follows:
- 80 mW into 600 Ω From a ±12V Supply at 0.00014% THD + N
- Current-Feedback Architecture
- Greater than 120 dB of Dynamic Range
- SNR of 120 dB
- Output Voltage Noise of 5 μVrms at Gain = 2 V/V
- Power Supply Range: ±5 V to ±15 V
- 1300 V/μs Slew Rate
- Differential Inputs
- Independent Power Supplies for Low Crosstalk
- Short Circuit and Thermal Protection
LED PWM dimmer with PIC12F629
The following article describes LED light dimmer, based on software PWM (Pulse Width Modulation) generator with variable duty ratio. The microcontroller used for this project is PIC12F629 by Microchip. Continue reading “LED PWM dimmer with PIC12F629”
LED RGB light effects with PIC12F629
This project represents a small schematic for controlling a group of RGB LEDs with common anode or grouped single color LEDs (as the ones used in this case) using a PWM controller. And for the schematic to be very simple a minimal amount of components is used and also a low end microcontroller by Microchip. That’s why I think this schematic could be built even by a beginner. In addition there is no hard to find components used.
Infrared (IR) web camera
The following article will show you one of the easiest ways for making Infrared camera out of a standard web camera. First I will try to explain the difference between what a standard and infrared camera can “see”. The graphic below shows two light bands. The left is what a human being can see or Visible Light. The right is the infrared spectrum. Most of the objects around us emit or reflect significant amount of visible light as well as infrared light. When you you low power light bulb (incandescent) to bring light in you room and you try to use standard web camera, you will see that it hardly can show you what is in front of it. Using an infrared camera the picture of the same room will be about five times brighter. That’s because only 20% of the light emitted from a standard incandescent bulb is in the visible spectrum and the other is infrared.
Now it is time to show you how to modify a standard web camera and turn it into infrared camera.
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