How Battery-free Flashlights Works.

It sound too good to be true. Let's see how these battery-free flashlights works. (5/20/2006)
Category: light circuits electronics - Updated: 2009/07/23
PSP model PSP-1001

How To Repair Sony PSP

For some reason, my PSP wasn't working ok. It had some sticky keys. Here is a "quick reference" how to repair the PSP keys. (09/20/07)
Category: howto diy electronics - Updated: 2009/07/23
DELL E172Fbp display

How To Repair Dell E172Fbp Display

Here are the instructions, and photos, how I did fix my DELL display E172Fbp LCD with a "flashing power light". This repair also works for model E171Fbp and E173Fbp. It may solve the "black screen" problem. An $8.00 USD repair. (5/12/2007)
Category: diy electronics computer howto - Updated: 2009/07/23
Hard Disk

Inside a Hard Disk.

Let's find how looks like inside a Hard Disk. (1/15/2008)
Category: computer interesting electronics - Updated: 2009/07/23
In-Circuit Debugger


In-Circuit debugger, created by E.E. Atanasios Melimopoulos. Updated Ver 1r1 (3/20/2009)
Category: microcontroller hacks electronics from_readers - Updated: 2009/07/24

LCD GD-1505 AP

Technical information about this LCD display. (4/22/2006)
Category: electronics circuits - Updated: 2009/07/23
LED chaser 4017B 4017 NE555

LED Chaser.

A LED chaser using a CMOS 4017 and a 555. (5/28/2006)
Category: electronics circuits automobile light - Updated: 2009/07/23

"Lens Error" on Kodak cameras.

According to some websites, "lens error" on Kodak Digital cameras is a common problem, the solution? pretty simple. (So simple that, actually, you will be surprised). Let's find what's wrong with those cameras, specially the EasyShare models. (5/10/2007)
Category: diy electronics howto - Updated: 2009/07/23
Logic probe easy to build homemade home made pulse injector

Logic Probe.

An useful and easy to build Logic Probe with Pulse injector. An schematic of a "digital version" is included.
Category: electronics circuits homemade - Updated: 2009/10/03
Schematic for the Matrix Display

Matrix Led Display.

A mini display using an array de 5x24 LEDs using Microchip PIC 16F628. (10/14/2004)
Category: microcontroller diy electronics - Updated: 2009/07/24

Mini Amplifier with LM386.

The LM386 is a low voltage audio power amplifier, simple and easy to build a mini amplifier with only a few components. (7/3/2006)
Category: electronics circuits homemade audio - Updated: 2009/07/23
ni-cad battery charger.

Ni-Cad Battery Charger with LM317

A simple circuit used to charge old Ni-Cad cells for your electronic project. A solar version of the battery charger included. (3/3/2008)
Category: electronics circuits homemade - Updated: 2009/07/23
quartz clock

One Second Timebase.

Here are the instructions how to get one-second (1hz) pulses from a broken quartz clock. This is a precision timebase generator that can be used in any project that needs exactly one-second pulses. (6/11/2006) Updated!
Category: electronics circuits diy projects - Updated: 2014/03/02
A PMW using a 555 oscillator.

PWM using 555.

A simple oscilator with PWM that can be used to control speed of motors or light intensity. (4/29/2006)
Category: electronics circuits - Updated: 2009/07/23
Apple iPod frozen

Reset a frozen iPod.

It happens sometimes. With no apparently reason the iPod freezes and needs to be reset. Here is how to do that. (July 30, 2009)
Category: howto audio electronics - Updated: 2009/07/29

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