![[Photo of prototype]](upp.jpg) |
The photo shows the prototype of my PIC16C5X/XX
programmer. It doesn't correspond exactly to the
schematic; the main differences are that the prototype
uses 100mA regulators rather than 500mA ones, a 24-pin
header rather than a DB25 for the printer port
connections and links rather than a switch for 18/28-pin
configuration. It is fitted with a 32-pin ZIF because I
didn't have a 28-pin ZIF handy. Top left is the regulator area; bottom left the VPP circuitry; top right the ISP header; and bottom right is the 18/28 pin "switch", activity LEDs and VDD control. The three chips and ZIF (shown with a PIC16C55 inserted) occupy the rest of the board. |