TASK 13 : 555 IC astable multivibrator with 60% duty cycle
Objective:
Design a 555 IC astable multivibrator with 60% duty cycle
Components required:
| Component | Name | Quantity |
|---|---|---|
| 555 IC Timer | U1 | 1 |
| 0.033 uF | C1, C2 | 2 |
| k | R1 | 1 |
| k | R2 | 1 |
| VRPS – 5V | V1 | 1 |
The connections are made on the bread board as shown in the circuit diagram below:-
Learnings and outcome:
- I learnt the working of 555 IC timer
- The formula used to calculate the ratio of the resistors to be used while designing an astable multivibrator with given duty cycle is:
where the required duty cycle is 60% i.e. 0.6, thus 2 R1 = R2 is the required relation b/w R1 and R2.
3. The expected duty cycle was 60% but the result I got was just 40.71%.
TASK 14 : Karnaugh Maps and Deriving the logic circuit
Objective:
For 4 cases, based on door lock/open and key pressed/not pressed, determine the Karnaugh map and make a burglar alarm using simple logic circuits. The buzzer or led blinks when certain conditions are met, you can use push buttons for the door and key. (Tip: use logic gates, use k-maps to figure out the working conditions)
Learnings and outcome:
Reference for truth table:
| Component | Short form | Value | Meaning |
|---|---|---|---|
| Door | D | 0 | Closed |
| Door | D | 1 | Open |
| Key | K | 0 | Not pressed |
| Key | K | 1 | Pressed |
| Alarm | A | 0 | Off |
| Alarm | A | 1 | On |
Truth Table:
| D | K | A |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
K-Map based on the truth table:
Logic circuit of the K-Map:
Result:
When the door is opened (D=1) without pressing the key (K=0), the alarm will ring (A=1)…because that’s the case when an anonymous person enters our house(for instance)…thereby fulfilling the conditions of a burglar alarm.
TASK 16 : Datasheets Report Writing
Objective:
Study the datasheet of L293D motor driver and write a report on it. Specify about the ICs used in it, PWM, H-bridge etc.
View my work here- Jitha's report on L293D motor driver
TASK 17 : Introduction to VR
Objective:
Familiarise yourself with what Virtual Reality is. Make a detailed study about what's the difference between VR and AR. Mention about the trends in the space and technology stack being developed. Mention about Indian companies in this space. Make the report with detail.
View my work here- Jitha's report on VR
TASK 18: Sad servers - "Like LeetCode for Linux"
Objective:
Here is a troubleshooting scenario: Command Line Murders. Troubleshoot and Make Sad Servers Happy! Command line murder
Outcome:
