Simple Universal PIC Programmer circuit

This simple programmer will accept any device that`s supported by software. The circuit is based in part on the ISP header described in the SILICON CHIP `PIC Testbed` project but also features an external programming voltage supply for laptops and for other situations where the voltage present on the RS232 port is insufficient. This is done using 3-terminal regulators REG1 & REG2. The PIC to be programmed can be mounted on a protoboard. This makes complex socket wiring to support multiple devices unnecessary. 16F84A, 12C509, 16C765 and other devices have all been used successfully with this device..
Simple Universal PIC Programmer circuit - schematic

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