remote control circuit

This is a universal remote control I built. The entire thing was programmed with just 1KBof memory, and works with TV`s using the RC 5, RC 80, and NEC protocols (most TV`s). Its effective range is about 40m, and is effective at angles up to 60 degrees. I began by using ExpressSCH to lay out a schematic of the circuit required to power the micropro

cessor and LEDs. I used I then usedGoogleSketchUpto create amocked up3D model of the remotes appearance. Using ExpressPCB, I then arranged the parts in a real world design that would fit the mock up. I calculated all the required values for parts, such as resistance for the resistors, and current for the LEDs, thenorderedthem from Digikey. com. I then used circuit board coated with photosensitive chemicals to print my circuit onto the board, through a multi-step chemical process. After cutting the board down to size, I soldered all the parts in. The process of programming and debugging required the largest majority of time. I programmed in MPLAB, and used, a multimeter, digitaloscilloscope, CHRP board (see here ), and MPLAB SIM to debug.

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