This low cost prototyping board for 40-pin AT89S5x and AVR microcontrollers comes mounted with an AT89S52 microcontroller in a 40-pin DIP socket and minimum support components, like a reset switch, crystal and power-on LED. All microcontroller port pins are each routed to two adjacent through-hole solder pads. Dedicated solder rows for Vcc & GND help to simplify connections of your own components. A generous prototyping area allows you to add your own circuitry. This board works at 3.3V or 5V DC for AVR and only at 5V DC for 89S51 / 89S52 / 89S8253. Use this board for your quick experiments and prototypes. Note: This board has no on-board voltage regulator. You must use this board with a regulated DC power supply. Exceeding 5.5VDC will damage the components on this board. The universal supplies shown in the options below do not have a 5V setting. You can use them, however, in combination with one of the 5V regulator boards found in the Voltage Regulators Category. That category also has some USB-sourced options. Programming This board has a single row, male ISP header for in-circuit programming of the microcontoller. Most AVR ISP programmer have a 2x10 or 2x6 pin ISP connector. To use such a programmer with this board, you will need an AVRISP adapter together with some prototyping wires to interface between your programmer and this board. (see add-on options below). Alternatively you could make your own ISP adapter cable. We also offer a low cost serial port AVR ISP programmer that has the matching 6-pin single row ISP connector (see add-on options below).       AT89S52 & AVR Board Downloads
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