TRXCharger is a small however very efficient battery charger for nickel cadmium and nickel metal hydride Akkus. To be able to load it developed over with high rivers to the reflex load procedure individual Akku cells with good efficiency. The charging current can be given by means of in button operation in 15 steps (typically: [...]
The purpose of this project is to realize a Solar panel controller. Initially developed for a sailing boat, the target to reach was to control the level of charge and discharge and to protect a 12 volts lead battery connected to a 32 watts solar panel.
The project is based on a 12F675 and uses HEXFETs [...]
Fix any broken LCD backlight with an ordinary light bulb and a dead CRT monitor.
Broken LCD monitors basically come in three categories:
1) Cracked LCD panel, rendering the unit completely worthless
2) Backlight problem
3) Power supply problem
If it’s a backlight or power supply problem, it can be fixed.
Usually, the problem stems from the high voltage inverter circuitry, [...]
Panasonic have been making some kick ass digicams recently, with ludicrously good features and optics for the prices. However, this comes somewhat at the expense of build quality.
A commonly reported problem with the FZ5 is the lens becoming stuck in one position. This is because the cogs that drive it are made of plastic and [...]
No programming or microchips!
Robots, the most awesome thing there is, especially when allot of people can build it!
Source: dunnos
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 [...]
A VU meter is often included in audio equipment to display a signal level in Volume Units; the device is sometimes also called volume indicator (VI). In this project we are building a basic and low cost LED VU Metre circuit . The extent (range) display is -18 dBu to +3 dBu, spread over [...]
Today we have a new category “Projects” and a new electronic project 12 Channel LED Chaser with PIC16F84A.
This project is based on the popular PIC16f84A micro-controller.The heart of this project LED chaser is the PIC16F84A PIC microcontroller.A 4MHz crystal and capacitors C1 and C2 22pf is used for providing clock pulses to the micro-controller. The [...]
