Senin, 26 Oktober 2009

USB Keyboard by Microcontroller with Embedded Hub Circuit

The Atmel sample version of the AT43USB326 contains firmware
that supports customization of the Vendor ID, Product ID,
String Descriptor and the keyboard matrix. This information
is stored in an external AT24C02A serial EEPROM.

The Atmel AT43USB326 is an 8-bit microcontroller based on the
AVR RISC architecture. By executing powerful instructions in
a single clock cycle, the AT43USB326 achieves throughputs
approaching 12 MIPS. The AVR core combines a rich instruction
set with 32 general-purpose working registers. All 32 registers
are directly connected to the ALU allowing two independent
registers to be accessed in one single instruction executed in
one clock cycle. The resulting architecture is more code efficient
while achieving throughputs up to ten times faster than
conventional CISC microcontrollers.

• AVR® 8-bit RISC Microcontroller with 83 ns Instruction Cycle Time
• USB Hub with One Attached and Two External Ports
• USB Keyboard Function with Three Programmable Endpoints
• 16 KB Program Memory, 512 Bytes Data SRAM
• 32 x 8 General-purpose Working Registers
• 32 Programmable I/O Port Pins
• Support for 18 x 8 Keyboard Matrix
• Keyboard Scan Inputs with Pull-up Resistor
• Four LED Driver Outputs
• One 8-bit Timer/Counter with Separate Pre-scaler
• External and Internal Interrupt Sources
• Programmable Watchdog Timer
• 6 MHz Oscillator with On-chip PLL
• 5V Operation with On-chip 3.3V Power Supply
• 48-lead LQFP Package

Rabu, 08 April 2009

4 Digit Counter

This is a simple schematic 4 digit counter, we can develop it to any other counter

Senin, 04 Agustus 2008

Bass Amplifier

This Schematics is very siple bass amplifier, it only used one gate operation amplifier (OP-AMP). if you to make it more high gain bass amplifier you can used one gate op-amp again.

Minggu, 04 Mei 2008

Minggu, 11 November 2007

10 Watt Amplifier

10 Watt Amplifier is a schematics for build a Amplifier, this schematics used push pull amplifier with two Transistor MJ480 as power.

This amplifier can used for simple audio car, Tape recorder , FM Radio Etc. For download this Schematics please Right Click and Save image As!.

8 Watt Amplifier

This Schematics is 8 watt amplifier that used IC TDA2030, this circuit is very simple but can make a sound very nice, to download this schematic right click and save image as!.

3 Line Mixer