No steps this time. A specification, your kit, and everything you have learned. Build the guardian. Earn the certificate.
Enter the access code from the card inside your Beginner Kit (or from your GAMERIFT order email). Your name appears on every page and printout as the licensee.
Don't have a kit yet? Get the Beginner Kit, the code ships inside. Lost your code? Contact us with your order number.
Nobody hands a working engineer a step-by-step wiring table. They get a specification, what the machine must do, and it is their job to figure out how. That is what graduation means here: eleven lessons gave you every skill this build needs. Buttons, sensors, state, thresholds, alarms, displays, error handling. Now you put them together, alone, into one machine: The Sentinel, a desk guardian that watches, counts and raises the alarm.
Time: plan a weekend, take longer if you need it · Difficulty: earned · You need: Lessons 01 to 11 done.
Any lesson may be reread. Your own remixes may be reused, that is why you logged them. What you may not do is have someone else wire or write it for you. Reviewers chat with you about your build, and it shows immediately when the builder is not the author. Be the author.
| # | Requirement | You learned this in |
|---|---|---|
| 1 | Watch. Detect when something comes within about a hand-span of the guard post, using the IR eye. | Lesson 11 |
| 2 | Alarm. On detection, sound an urgent alarm pattern (buzzer) and flash a warning light (LED) until the intruder leaves. | Lessons 08, 11 |
| 3 | Count. Show the number of intrusions so far on the 7-segment display (0 to 9 is fine, wrap or hold at 9, your choice, defend it). | Lesson 07 |
| 4 | Report. Print the room temperature and each intrusion event to the Serial Monitor, with readable words, not just numbers. | Lessons 04, 09 |
| 5 | Arm and disarm. A button (or the tilt switch, braver) switches the Sentinel between ARMED and OFF DUTY. Off duty, it must stay silent no matter what the eye sees. | Lessons 03, 10 |
Suggested pin map (yours may differ, just say so in your video): DHT11 on 2, display bars on 3 to 9 with its resistor to GND, IR eye OUT on 10, buzzer on 11, warning LED on 12, arm button on A1 used as a digital pin, it can do that. Running low on wires? Requirement 4's temperature may be read at startup only, and say so. Engineering is trade-offs, stated out loud.
Do not wire everything and pray. Get the eye alone triggering serial prints. Add the alarm. Add the counter. Add arming last. Every professional system you have ever used was built exactly this way: one working layer at a time. If layer four breaks, the bug is in layer four.
| Check | Pass looks like |
|---|---|
| It works | All five spec requirements happen on camera |
| It is yours | You can name a decision you made and give a reason |
| It is tidy enough | Wiring follows the one rule (resistors in every LED loop) and would not shame Lesson 01 you |
| It recovers | Disarm truly silences it; re-arm truly restores it, state handled properly |
Look at what is on your desk: a machine that senses, decides, remembers, counts and reports. That is, honestly, most of what industrial automation is. When you are ready for motors and wheels, the Robot Builder Kit takes these exact skills and puts them on wheels. Either way: you built this. Nobody can un-teach you that.
