1. Ding Dong: A Doorbell System! 8 Points
Save on your W: drive and submit to Canvas when completed.

2. Wired (wireless goes on the next slide):
1) Doorbell systems come in two basic configurations: Wired and wireless. Find one of each at and copy and paste their pictures, costs, descriptions (10 lines max), and specifications (10 lines max) below.
Make sure you’re looking at a doorbell system and not just a part of a doorbell system (like the transformer or plastic cover).
Wired (wireless goes on the next slide):

3. and specification (10 lines max) below:
2) Wireless
(remember to copy and paste the picture, cost, description (10 lines max),
and specification (10 lines max) below:

4. INSTALLING A SINGLE-BUTTON DOORBELL
Read the information below for a basic doorbell system and answer the following questions (#3-8). You’ll notice questions #3-8 refer to some of the terms from your Big Ideas page.
Hint: In addition to the other elements, consider the power source and people when answering the questions #3-8 below.
INSTALLING A SINGLE-BUTTON DOORBELL
The simplest doorbell or buzzer installation is the one illustrated below. In this instance, a button is mounted on one door only to operate the buzzer or bell.
One wire runs unbroken from the terminal screw on the button of the bell or buzzer to the terminal screw on the transformer. The second wire runs from the button to one of the terminal screws on the bell, then from the second terminal screw back to the other screw on the transformer.
The button can be mounted on any door–as far away from the bell as you'd like–and the bell and transformer can be mounted in any concealed location.

5. 3) Resources – “Things needed to get a job done
3) Resources – “Things needed to get a job done.” List the resources needed for this system to operate. Hint: As mentioned on the previous slide, some resources may not be visible in the picture.

6. Circle one: Optimization Trade-off Processes Control
4) Which term from the Big Ideas page best describes the parts of the system you see in the picture below?
Circle one:
Optimization
Trade-off
Processes
Control

7. 5 and 6) Identify the following in this doorbell system:
Input:
Processes:
Output:

8. From Unit 2 Lesson 2:
An open-loop system has no feedback path and requires human intervention to keep it going after the process of starting it is initiated. A closed-loop system uses feedback and does not require human intervention to keep it running after it is started.
Is this doorbell circuit an “open-loop” or “closed-loop” system? Explain your answer.

9. 8) Explain what this diagram is showing (this is a different doorbell system than the one discussed up until now):