| No | Part number | Description ( Function ) | Manufacturers | |
| 2 | QSD722 | PLASTIC SILICON PHOTOTRANSISTOR |
 QT Optoelectronics |
|
| 1 | QSD722 | PLASTIC SILICON INFRARED PHOTOTRANSISTOR PLASTIC SILICON INFRARED PHOTOTRANSISTOR QSD722 PACKAGE DIMENSIONS 0.190 (4.83) 0.178 (4.52) QSD723 QSD724 45° REFERENCE SURFACE 0.235 (5.97) 0.218 (5.54) 0.030 (0.76) 0.800 (20.3) MIN EMITTER 0.050 (1.27) 0.100 (2.54) NOM 0.215 (5.46) NOM 0.020 (0.51) SQ 2PLCS COLLECTOR SCHEMATIC COLLECTOR 45° 0.020 (0.51) RADIUS NOTES: 1. Dimensions for all drawings are in inches (m |
 Fairchild Semiconductor |
|
[1]
List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
|
| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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