Wednesday, May 10, 2006

S/PDIF - TOSLINK interface

Circuit & Information on TOSLINK interface





So you want to get a high quality audio for minidisc recording but when
using red and white RCA, the quality drop drastically. Here a my cheap solution for you.
Actually you can find a lot of references of this type of simple project in the internet.



REF


* S/PDIF = Sony/Philips Digital Interface

* TOSLINK = (

TOSLINK Interconnect History & Basics

)

* Another web offering the same information


* SPDIF at epanorama.net







Meet my version of cheap, 2 components TOSLINK @ S/PDIF.
Try to find a cable with connector from old PC casing for this.
(HDD led,reset switch or power button connector)






Assemble it using your own creativity. Use the pen tube for the light transmission.






Connect it to the back of your CDROM drive. Since (D, the signal should go to anode and G should go to the ground/cathode)






Test it out. you should see the light come out from the tip/tube.







Connect to your MD or other device such as power amp that support optical in.






Actually, I have one of this (USB to SPDIF converter) for my minidisc but just to share with you on how to find a supercheap
solution before start buying. :-)


Even my new MSI mainboard do have built-in TOSLINK :-)

Friday, May 5, 2006

PC IrDA interface

DIY IR interface





This circuit is also from www.electronics-lab.com.
Since it is very hard for me to get the infrared interface (TFDU4100), I start to look in the old/damage handphones.
It looks something like this.






Now, you need to remove it using the hot air blower perhaps.




Connecting to motherboard


Please refer to www.electronics-lab.com
on how connect this irda module to your motherboard.

My IrDA







Infrared Transceiver Modules


Here are the pin layout and picture of the device.







Pin Description of TFDU4100


































































Pin Number Function Description I/O Active
1 IRED Anode
IRED anode, should be externally connected
to VCC2 through a current control
resistor
2 IRED Cathode
IRED cathode, internally connected to
driver transistor
3 Txd Transmit Data Input 1 High
4 Rxd
Received Data Output, open collector.
No external pull–up or pull–down resistor
is required (20 k. resistor internal to device).
Pin is inactive during transmission.
0 Low
5 NC Do not connect
6 VCC1/SD Supply Voltage / Shutdown
7 SC Sensitivity control 1 High
8 GND Ground