Replacement: None. There is no direct replacement for this board. This page is for reference only.

A nice prototype board for 20 pin AVR microcontrollers with with power supply circuit, crystal oscillator circuit, RS232 port, reset IC, status LED, 10 pin STK ICSP port.

Board does not come with AVR installed. Please see a list of related ICs below.

Note: You must remove the LED jumper before attempting to program a socketed AVR.

• FR-4, 1.5 mm (0.062"), green solder mask, white silkscreen component print
• Four mounting holes 3.3 mm (0.13")
• ICSP 5x2 pin connector for in-circuit programming with AVR Programmers
• Voltage regulator +5V, 7805 and filtering capacitors
• Quartz crystal oscillator circuit - 10MHz
• Reset IC ZM33064
• Status LED connected to PB7 via removable jumper
• Power plug-in jack
• AGND-GND AVCC-VCC jumpers
• DIL28 microcontroller socket
• RS232 DB9 female connector
• RS232 MAX232 interface circuit with Tx, Rx, CTS, DTR/RTS signals
• Extension slot on every uC pin
• Grid 100 mils
• GND bus
• VCC bus
• 100x80 mm (3.9x3.15")

• avr-p20b.pdf
• Schematic
• AVR ICSP connector