| Manufacturer | Part # | Datasheet | Description |
 Adafruit Industries |
4042
|
1Mb/2P |
Diffused Red and Green Indicator LED - 18mm Round
2-8-19 |
 New Jersey Semi-Conduct... |
40421
|
91Kb/1P |
GERMANIUM POWER TRANSISTORS
|
 Extech Instruments Corp... |
404216
|
185Kb/1P |
pH Controller 1/16 DIN
|
 Pentair plc. All rights... |
40422
|
4Mb/56P |
A minimum of 20 pounds (1.4 bar) of water pressure is required for regeneration valve to operate effectively
|
 New Jersey Semi-Conduct... |
40429
|
140Kb/1P |
Thyrlstors
|
 NXP Semiconductors |
4042B
|
60Kb/6P |
Quadruple D-latch
January 1995 |