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id2:bom:start [2020/05/04 16:02] piumarta |
id2:bom:start [2020/05/06 09:58] (current) piumarta |
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| Should not be connected directly to the microcontroller. | Should not be connected directly to the microcontroller. | ||
| Use at least a 150Ω series resistor on one of the loudspeaker leads to limit the current. | Use at least a 150Ω series resistor on one of the loudspeaker leads to limit the current. | ||
| + | <WRAP>{{ :id2:bom:sp36mm.png?direct&100|}}</WRAP> | ||
| <WRAP clear></WRAP> | <WRAP clear></WRAP> | ||
| {{ :id2:bom:03-p1350494.jpg?direct&200|}} | {{ :id2:bom:03-p1350494.jpg?direct&200|}} | ||
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| **23.** 2 × 74HC164 octal serial-in parallel-out shift register. | **23.** 2 × 74HC164 octal serial-in parallel-out shift register. | ||
| {{ :id2:bom:74hc164-p1350532.jpg?direct&100|}} | {{ :id2:bom:74hc164-p1350532.jpg?direct&100|}} | ||
| - | With the U-shaped notch on the left, pin 1 is bottom-left, pin 7 is bottom-right, pin 8 is top-right and pin 14 is top-left. | + | With the U-shaped notch on the left, pin 1 is bottom-left, pin 7 is bottom-right, pin 8 is top-right and pin 14 is top-left.\\ \\ |
| **24.** 2 × 74HC595 octal serial-in parallel-out shift register with tri-state output register. | **24.** 2 × 74HC595 octal serial-in parallel-out shift register with tri-state output register. | ||
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| **25.** MCP3204 4-channel 12-bit analogue-to-digital converter with SPI interface. | **25.** MCP3204 4-channel 12-bit analogue-to-digital converter with SPI interface. | ||
| {{ :id2:bom:mcp3204-p1350532.jpg?direct&100|}} | {{ :id2:bom:mcp3204-p1350532.jpg?direct&100|}} | ||
| - | The dot indicates pin 1. Pins are numbered anti-clockwise. | + | The dot indicates pin 1. Pins are numbered anti-clockwise.\\ \\ |
| **26.** MCP4822 2-channel 12-bit digital-to-analogue converter with SPI interface. | **26.** MCP4822 2-channel 12-bit digital-to-analogue converter with SPI interface. | ||