Doorbell Control (Home Automation) Notification Hardware Unit
Sunday, May 8th, 2011
In an addition to my original Doorbell Control project, along with software based notification of events I put together a portable, battery operated unit as well.
The unit operates from two AA batteries and features:
- 1 Red LED
- 2 Green LEDs
- 1 Buzzer
- 2 Push switches
- 2 Toggle switches
Apart from the toggle power switch all LEDs/switches are software controllable via GPIO pins.
If the doorbell is rung, the bell sends a multicast RPC call which is picked up by the unit. One of the green LEDs is then turned on. Depending on the status of the (non power) toggle switch the buzzer is then turned on as well (the non power toggle switch is used to enable/disable the buzzer). One push button is used to reset the unit (turn back off the LED/buzzer). The red LED is used to indicate the power on/off status. The remaining extra push switch/LED are currently not used but built in for possible future functionality.
Parts List
| x2 | Green LED | UK49D |
| x1 | Red LED | CK48 |
| x2 | Push Switch | NK91Y |
| x2 | Toggle Switch | FH00A |
| x1 | ABS Box MB1 | LH20W |
| x3 | LED Holder | N89AX |
| x1 | PP3 Battery Clip | HF28F |
| x1 | 2AA Battery Box | YR60Q |
| x1 | Buzzer | CR34M |
| x1 | Synapse RF Engine | RF100 |
Note: The DC plug/socket shown in one of the photos was later removed due to lack of space inside the box.
Download: Python Software
