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# School Store Information
Welcome to the ENES100 School Store, your one-stop shop for commonly-used OTV hardware! The School Store is open during normal staffed ENES100 hours (i.e., your section’s time and open lab hours) and will be located in JMP 1201. The School Store was created to make the OTV project more sustainable while saving you money. The Keystone department has collected and saved hundreds of OTV parts from past ENES100 teams that are now available for you to “purchase”. At the end of the semester, you will return the parts to the School Store for future teams to use.
## For Instructors
Click [here](https://enes100.umd.edu/labs/store/checkout) to facilitate sales.
## Budget, Available Products, and Pricing
Each mission team has a budget of 50 Shells. Shells are shown with the shell logo below. Wood sheets and Arduino Uno R4 WiFi boards are paid for separately in US dollars. The base stock list and their respective prices can be found below:
**NOTE:** On the first day of the build phase, each team may spend a maximum of 30 Shells. This helps ensure all teams have a fair opportunity to obtain the resources they need.
| Product | Price | Per-team limit |
| :---------------------------| :-------------- | :------------- |
| Arduino Uno R3 | 
8 | 3 |
| Arduino Uno R4 WiFi | $14* | — |
| Arduino Mega/Romeo | 20 | 1 |
| Breadboard | 1 | None |
| Motor Hubs | 4 | None |
| Motor Driver | 3 | None |
| HC-SR04 Ultrasonic Sensor | 1 | None |
| Servos | 3 | None |
| Motor | 5 per motor | None |
| KY-036 Metal Touch Sensor | 2 | None |
| Transistor | 2 | None |
| Water Sensor | 2 | None |
| KY-026 Flame Sensor | 2 | None |
| Color Sensor | 2 | None |
| Pressure Sensor | 2 | None |
| Potentiometer | 2 | None |
| Relays | 2 | None |
| Limit Switches | 2 | None |
| Voltage Regulator | 2 | None |
| Spacers/Risers | 2 | None |
| Springs/Balloons | 2 | None |
| Tubing/Pipes | 2 | None |
| Pumps/Fans | 2 | None |
| Safety Switches | 3 | None |
| Tamiya Connectors | 4 | None |
| 6V - 12V NiMh Batteries | 15 | 1 |
| Wheels | 4 per wheel | None |
| Small Wheels | 3 per wheel | None |
| Wheels Caster | 3 per wheel | 2 |
| Omni Wheels | 5 per wheel | None |
| Wood Sheet | $3* | None |
| PLA Sheet | 2 | None |
*Wood sheets and Arduino Uno R4 WiFi boards are purchased with real cash (US dollars), not Shells. Both can be purchased in JMP2108 from Mrs. Nelpe Wachsman, Monday–Friday, 9am–4pm.
Since the parts here have been used by previous ENES100 teams, there are no guarantees that School Store Batteries or Arduinos work. After purchasing, try to get soldered/wired as soon as possible to test them. If they are faulty or fried, please return to the School Store to replace them within 5 calendar days. If your team fries an Arduino, you can buy another one, but remember, your team may only buy up to 3 Arduino Uno R3 boards from the School Store for the semester. An arduino that is faulty or fried upon purchasing from the School Store does not count toward the 3 Arduino Uno R3 and/or 1 arduino mega limit.
Other mission specific and less common parts such as sensors, voltage regulators, and miscellaneous hardware will be available for less than 3, and prices for these items can be checked on the School Store Cart each semester.
## Procedure
When you would like to purchase a part from the school store, please talk to a UTF or an LTF on duty. Students may not use the school store application. (check out / purchase).
8 | 3 |
| Arduino Uno R4 WiFi | $14* | — |
| Arduino Mega/Romeo | 20 | 1 |
| Breadboard | 1 | None |
| Motor Hubs | 4 | None |
| Motor Driver | 3 | None |
| HC-SR04 Ultrasonic Sensor | 1 | None |
| Servos | 3 | None |
| Motor | 5 per motor | None |
| KY-036 Metal Touch Sensor | 2 | None |
| Transistor | 2 | None |
| Water Sensor | 2 | None |
| KY-026 Flame Sensor | 2 | None |
| Color Sensor | 2 | None |
| Pressure Sensor | 2 | None |
| Potentiometer | 2 | None |
| Relays | 2 | None |
| Limit Switches | 2 | None |
| Voltage Regulator | 2 | None |
| Spacers/Risers | 2 | None |
| Springs/Balloons | 2 | None |
| Tubing/Pipes | 2 | None |
| Pumps/Fans | 2 | None |
| Safety Switches | 3 | None |
| Tamiya Connectors | 4 | None |
| 6V - 12V NiMh Batteries | 15 | 1 |
| Wheels | 4 per wheel | None |
| Small Wheels | 3 per wheel | None |
| Wheels Caster | 3 per wheel | 2 |
| Omni Wheels | 5 per wheel | None |
| Wood Sheet | $3* | None |
| PLA Sheet | 2 | None |
*Wood sheets and Arduino Uno R4 WiFi boards are purchased with real cash (US dollars), not Shells. Both can be purchased in JMP2108 from Mrs. Nelpe Wachsman, Monday–Friday, 9am–4pm.
Since the parts here have been used by previous ENES100 teams, there are no guarantees that School Store Batteries or Arduinos work. After purchasing, try to get soldered/wired as soon as possible to test them. If they are faulty or fried, please return to the School Store to replace them within 5 calendar days. If your team fries an Arduino, you can buy another one, but remember, your team may only buy up to 3 Arduino Uno R3 boards from the School Store for the semester. An arduino that is faulty or fried upon purchasing from the School Store does not count toward the 3 Arduino Uno R3 and/or 1 arduino mega limit.
Other mission specific and less common parts such as sensors, voltage regulators, and miscellaneous hardware will be available for less than 3, and prices for these items can be checked on the School Store Cart each semester.
## Procedure
When you would like to purchase a part from the school store, please talk to a UTF or an LTF on duty. Students may not use the school store application. (check out / purchase).