Circuit Diagram Knowledge: board

Showing posts with label board. Show all posts

Thursday, November 20, 2014

AT89Sxx Base Board

The board is based on the AT89S51, AT89S52, or AT89S53. This board uses STK200 for program loading and includes the serial port at the STK200 header. When I need to program the MCU and need a serial comunication, I do not need to plug and unplug the connector. Because I am using the USB to Serial ISP programmer. Then with the STK200, we must built the parallel programmer STK200. This parallel programmer STK200 can also be use for AVR programmer. This is the reason for the new design.

The PCB layout.

Here continue read..

Thursday, October 23, 2014

System circuit not Minimum Evaluation Board AT89C2051 and AT89C4051

Maybe we are more familiar with the term Minimum System AT89C2051 circuit, but this time I present a circuit which is not only a series of Minimum System AT89C2051 but more than that.

The circuit is more deserves to be called Evaluation Board AT89C2051 and AT89C4051. Some of the advantages of circuit Minimum System AT89C2051 / AT89C2051 and AT89C4051 Evaluation Board which I was present this time, hardware-hardware support below:

RS-232 interface, DB-9
Header for LCD display
I2C, PCF8574 I / O extender
AT24C04, I2C EEPROM

Here continue read..

Tuesday, September 2, 2014

System circuit not Minimum Evaluation Board AT89C2051 and AT89C4051

Maybe we are more familiar with the term Minimum System AT89C2051 circuit, but this time I present a circuit which is not only a series of Minimum System AT89C2051 but more than that.

RS-232 interface, DB-9
Header for LCD display
I2C, PCF8574 I / O extender
AT24C04, I2C EEPROM

Here continue read..