Unfortunatately this only provides 1. 8v signals and still needs a converter to interface to the 3. 3v signals most raw LCD use. The main components is the TFP101A. I got mine as a free sample from TI. Also visible in this picture is the fact that only the upper 6 of the 8 color bits available on the dvi2par are being used. It`s important to make sure that the upper bits are being used if the display supports less than 24 bit
Click here to download the full size of the above Circuit.
color depth. Also visible in the image is the fact that a tiny wire goes from pin 8 of the TFP101A to some other parts on the board is mounted on. Pin 8 carries the SCDT signal which indicates that a valid signal has been detected in the input. In this example the signal is routed to the backlight inverter and makes sure that the backlight is only switched on if a valid HDMI signal is being received. EDID/DDC support The dvi2par also includes an optional i2c eeprom which is meant to allow to use the dvi2par on hosts other than the beagleboard which support to use a displays ddc/edid configuration. However, this part has only been verified to be operational and to be usable on a standard linux desktop PC. But since this part is not necessary on a beagleboard, it isn`t tested to all detail. In order to use it, you need to build an EDID description for your particular display using e. g. the Phoenix EDID designer 1. 3 (A windows software which runs fine in wine). The output of this editor needs then to be programmed into the dvi2par ddc eeprom. The jumper JP1 has to be set to enable writing the eeprom. The i2c port of the hdmi connector then needs to be connected to some linux controlled i2c hardware like e. g. my i2c-tiny-usb. Below is an image of my i2c-tiny-usb based adptor used to write the ddc eeprom on the dvi2par. All remaining parts have been bought in germany from Reichelt and Conrad. The part numbers are: Part Qty...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: