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id2:bom:start [2020/05/04 10:51] 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|}} | ||
| Line 81: | Line 82: | ||
| **16.** LM35 centigrade temperature sensor. | **16.** LM35 centigrade temperature sensor. | ||
| + | <WRAP> | ||
| + | {{ :id2:bom:lm35-dsc03363.jpg?direct&50|}} | ||
| **WARNING:** These devices are completely different to the BC548 transistors (27) even though they look identical. | **WARNING:** These devices are completely different to the BC548 transistors (27) even though they look identical. | ||
| Before using either in a circuit, verify the code printed on the device to make sure it is the one you intend to use. | Before using either in a circuit, verify the code printed on the device to make sure it is the one you intend to use. | ||
| Using the wrong device in the circuit could destroy it. | Using the wrong device in the circuit could destroy it. | ||
| - | <WRAP clear></WRAP> | + | </WRAP><WRAP clear></WRAP> |
| {{ :id2:bom:17-p1350490.jpg?direct&200|}} | {{ :id2:bom:17-p1350490.jpg?direct&200|}} | ||
| **17.** 5 × momentary-action push-button switches. | **17.** 5 × momentary-action push-button switches. | ||
| Line 110: | Line 113: | ||
| **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. | ||
| Line 120: | Line 123: | ||
| **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. | ||
| Line 137: | Line 140: | ||
| Note: there are extra markings on these integrated circuits. | Note: there are extra markings on these integrated circuits. | ||
| The maker is shown in front of the device number (SN = Texas Instruments, MCP = Microchip) | The maker is shown in front of the device number (SN = Texas Instruments, MCP = Microchip) | ||
| - | and the package may be shown after the device number (N = plastic). | + | and the package type is sometimes shown after the device number (N = plastic). |
| <WRAP clear></WRAP> | <WRAP clear></WRAP> | ||
| {{ :id2:bom:27-p1350492.jpg?direct&200|}} | {{ :id2:bom:27-p1350492.jpg?direct&200|}} | ||
| **27.** BC548 general-purpose NPN silicon bipolar junction transistor. | **27.** BC548 general-purpose NPN silicon bipolar junction transistor. | ||
| + | <WRAP> | ||
| + | {{ :id2:bom:bc548-dsc03366.jpg?direct&50|}} | ||
| **WARNING:** These devices are completely different to the LM35 temperature sensors (16) even though they look identical. | **WARNING:** These devices are completely different to the LM35 temperature sensors (16) even though they look identical. | ||
| Before using either in a circuit, verify the code printed on the device to make sure it is the one you intend to use. | Before using either in a circuit, verify the code printed on the device to make sure it is the one you intend to use. | ||
| Using the wrong device in the circuit could destroy it. | Using the wrong device in the circuit could destroy it. | ||
| - | <WRAP clear></WRAP> | + | </WRAP><WRAP clear></WRAP> |
| {{ :id2:bom:28-30-p1350487.jpg?direct&200|}} | {{ :id2:bom:28-30-p1350487.jpg?direct&200|}} | ||
| **28.** USB cable type A to type B. | **28.** USB cable type A to type B. | ||