Today i created pcb for Lithium Ion / Lithium Polymer USB Battery Charger with MAX1811, and designed with eagle pcb software.  About Max1811 The MAX1811 is a single-cell lithium-ion (Li+) battery charger that can be powered directly from a USB port or from an external supply up to 6.5V. It has a 0.5% overall battery [...]

Today we made a new project SPI Flash Programmer. I needed this programmer to read  the contents of 25L1005 on a LCD Monitor. The circuit is connected to the PC via parallel port and he have external power supply. This circuit contains a few components listed below. IC1 : 8 Pin Machine Tooled IC Socket [...]

I needed this adapter to read the contents of EPROM on a Panasonic phone, and so I found this link here and built this adapter. Download PCB Board in PDF:  SOIC to Dil 8 Adapter

Today we did an project amplifier with LM386. This amplifier is very easy to make and very compact, works with a single power source whose value can be between 4V and 12V.It is based on the use of a type LM386 amplifier, capable alone to issue a power of several hundreds of milliwatts to a [...]

Today we make a new project Fastest Finger with microcontroller PIC16F628 from this link. This simple circuit has five buttons and five LEDs. Four keys are linked with players, the fifth provides manual reset. After switching on or after reset (reset, manual or automatic), all the LED off and the system is ready. One of [...]

Finally I found some time to create a project, I explored the google and I found one page with an interesting scheme on VGA interface.   So I made the pcb with eagle and I made it with the toner transfer method.   This project uses few parts, one microcontroller PIC16F84, one capacitor 100pf, one [...]

This ESR Meter I made it somewhere in 2007, and now I have only made the box still miss him to make him a mask. A lot of it is accurate and now for now is doing great. I made it from magazine Emiter 6nr 2004 year, the PCB can be bought from the magazine [...]

This project is a floor lamp that can take the color and brightness as desired. Adjusting the brightness of each group is provided by a generator whose frequency is fixed but whose duty cycle (temporal relationship between high and low) is variable, much more efficient than setting current variation in LEDs. It consists of a [...]

This project  allows instant start sequentially but a dozen low-voltage lamps 12 V / 60 W, and makes them fade and always sequentially (but slower). This system has been designed to meet the demand of a visitor who wanted ten recessed low voltage spot in a driveway to his house, with the following function:  – [...]

This circuit allows switching on a LED when the battery voltage (12V) drops below a certain threshold. The operating system is based on a comparison of tension, which comes in a zener diode. If the supply voltage is 12V and the zener diode is a 10V model (this is the case in the diagram), we [...]

This is a good looking and practical device that can be useful in many areas where countdown timer is needed. This project is based on the PIC16F84A microcontroller. The time range can be adjusted between 1 and 999 seconds.   This project  has 3 buttons and one of them is named Set Button. In order to [...]