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Posts Tagged ‘pic-microcontroller’

Saving the OSCCAL value for PIC 12F629 – 12F675

The PIC 12F629 and 12F675 have a factory set oscillator calibration value written to the last program memory location during manufacture. When programming the PIC the programmer software should read this value out, merge it with the program data being written to the PIC, and then write it back.
Read More : http://picprojects.org.uk/projects/piccal.htm

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Categories: Microcontroller Tags: pic-microcontroller, pic12F

Sensing Air Flow with the PIC16C781

Programmable Switch Mode Controllers (PSMC) are not just for switching power supplies. This technical brief describes how to use the PIC16C781 PSMC in combination with the Integrated Operational Amplifier, Digital-to-Analog Converter (DAC), and gated timer to construct a thermally operated air flow sensor with minimum external components.

Manual Servo Control by PIC16F84

Our next program will allow you to control the direction of the servo manually via a SPDT switch (with a center-off position) connected to ports B1 and B2. Without a center-off position, you will have to use two switches. A schematic is shown in figure 3 (below).