Microcontroller CircuitProblems and SolutionsSlide 3SoftwareTesting DevicesActivation/ResponseRelaysMicrocontroller Circuit▪ Flash Digital to Analog CircuitAnalog Devices 7224▪ MicrocontrollerPic18F242▪ Storage DevicesM24LC515(2)▪ CommunicationMAX232Problems and Solutions•DAC▪ Nyquist Theorem▪ Serial DAC MAX517▪ Solution: ▪ Flash DACProblems and Solutions•Connection Issues–RS232 Initial Connection–DIP Sockets–Relays–Changing Pin-outs for Flash DAC•Software Issues–CCP1 pin–Interrupt FlagSoftware•Technician Test MenuTesting Devices•Tests:–Communication–I2C Bus–DAC–Amplifier/CCP1 Pin–Lights (RA1 Pin)–Submenu:•Red = User input•Black = Pic outputActivation/Response•Rising edge activates a interrupt•ISR or Interrupt Service Routine will▪ Set a pin high (5V) ▪ Activates Photo-electric Relay▪ Random CCP1 value ▪ Set Interrupt Flag ▪ Writes to I2C bus ▪ Starts Play_Music FunctionRelays•Relays will go
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