![Please explain the purpose of the marked resistors and diode in this transistor relay driver circuit - Electrical Engineering Stack Exchange Please explain the purpose of the marked resistors and diode in this transistor relay driver circuit - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/7l9cC.png)
Please explain the purpose of the marked resistors and diode in this transistor relay driver circuit - Electrical Engineering Stack Exchange
![How to Build a Relay Driver Circuit | Relay driver circuit using transistor | Relay circuit diagram - YouTube How to Build a Relay Driver Circuit | Relay driver circuit using transistor | Relay circuit diagram - YouTube](https://i.ytimg.com/vi/YuF31gixqH0/maxresdefault.jpg)
How to Build a Relay Driver Circuit | Relay driver circuit using transistor | Relay circuit diagram - YouTube
![One Channel Relay Driver Using BC547 Transistor | Circuit Ideas I Electronic DIY Projects I Robotics One Channel Relay Driver Using BC547 Transistor | Circuit Ideas I Electronic DIY Projects I Robotics](https://www.twovolt.com/wp-content/uploads/2016/08/One-Channel-Relay-Board-Using-BC547-2.png)