Sensors and Other Components
| Type | Model | Purchased From | Unit Cost | Approximate Number on Hand | Comments |
| thermistor | KC006E-ND | Digi-Key | $2.05 | 150 | R25° 10 K; Dissipation Constant 1.0 mW/°C; Time Constant 10 seconds |
| photoresistor | PR-01 | Images Company | $2.00 | 125 | 1 K light; 500 K dark |
| flex sensor | flex sensor | Images Company | $10.00 | 75 | 10 K (0°) to 35 K (90°) |
| battery holder | BH4CL-ND | Digi-Key | $1.36 | 110 | 4 C-cells, horizontal |
| connectors & pins (Molex) |
03-06-1022 03-06-2024 02-06-2103 |
Digi-Key | $0.16 $0.15 $0.11 |
500 500 1500 |
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