Mutchus

Circuit diagram and PWB Click on the pictures to zoom in

Used ICs: L6562DTR, DAS01A, DLA001DTR PCB Top and foil side

This really a work that so cool if you like modif PC. So this is a USB interface for alphanumeric LCD display like 4 × 20 which can be controlled with LCD Smartie program. USB interface is implemented by using PIC18F2550 microcontroller, Using USB LCD modules. Below is a project of the USB LCD controller. Schematic circuit and PCB design source  | link

Generally for connecting an LCD display to an Arduino using 7 strands, it usually breaks the leg that has any projects that remain few ports to be used. But there is a way, using an IC 74LS164 (8-bit serial shift register), a resistor and a diode, but it's not just hardware, you have to use a library. This Arduino library for connection of 2-wire or 3-wire using HD44780 compatible LCD display via shiftregisters. This circuit is considered "deprecated", but it's worth testing. LCD Display on the Arduino Circuit 

Power Supply Unit For 32", 37", and 55" sets, power supply units should be repaired on component level.  All other power supplies are a black box for Service. When any of these power supplies is defective, a new board must be ordered and the defective one must be returned, unless the main fuse of the board is broken. Always replace a defective fuse with one with the correct specifications. This part is available in the regular market. Replace safety components, indicated by the symbol , only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard. PLDC-P109B (32" sets) and PLDD-P109A (37" sets) The output voltages to the chassis are: * V STB (+3.3 V; stand-by mode) * V SSB (+12.3 V; on-mode) * V SND (+12.3 V; audio circuit). Test instructions 32" & 37" * check fuse (F101) * standby check VSTB (C306), measure 3.3 V * PFC voltage check (C644), mea...

T'Con board Circuit Diagram – FB-03C – Part number 8204 000 92022 -  Philips 37" LCD TV   Tcon LVDS & Control  Tcon power  Tcon supply Tcon mini-LVDS  Click on the schematics to magnify

Video control and display data:  Video signal is received from TUNER, AV port(AV1,AV2,S-Video,Component) and goes to the one-chip video decoder (VCTI) which separate the R,G,B signal and passes on the signal to AD converter(AD9883) which converts 4:4:4 video format into digital and gives output to the Picture Enhancer(FLI2300).This picture enhancer improves the quality of the picture by changing the level of RGB signals. The output of this enhancer chip is fed to the deinterlacer ,which in turn goes to the Scalar (GM5221).The scalar gives the output on the LVDS cable which is connected to LCD module.  VCTi acts a micom and is responsible for video processing and audio signal processing. It accepts the RF signal and separates sound and picture from it.  Scaler is responsible for regulating the timing of signal to LCD panel and size and location of the signal. Graphic control accepts the PC(Analog RGB) and DVI-D (Digital ) signal, Scalar is responsible for regulating the t...

Circuit diagram and PWB Click on the pictures to zoom in

LCD Module in 4-bit Mode Circuit diagram. In many projects use is made of alphanumeric LCDs that are driven internally by Hitachi’s industry-standard HD44780 controller. These displays can be driven either in 4-bit or 8-bit mode. In the first case only the high nibble (D4 to D7) of the display’s data bus is used. The four unused connections still deserve some closer attention. The data lines can be used as either inputs or outputs for the display. It is well known that an unloaded output is fine, but that a floating high-impedance input can cause problems. So what should you do with the four unused data lines when the display is used in 4-bit mode? This question arose when a circuit was submitted to us where D0-D3 where tied directly to GND (the same applies if it was to +5 V) to stop the problem of floating inputs. The LCD module was driven directly by a microcontroller, which was on a development board for testing various programs and I/O functions. There was a switch present for turnin...