Child phone

The main goal of this device is a simple use. It is suitable for children or old people. Only lifting the handset is needed to make outgoing call or to accept the ingoing call. The number for outgoing calls must be programmed by parents. The ring volume is 10 times more louder then ordinary phone ring volume.
This phone based on a value line microcontroller MSP430G2452 and cheap Nokia C42 cell phone.