This is new device I have build for my wife for her to complete her physiotherapy. She wanted a device that provided fixed interval timing, a visual alert and a sound alert.
During the design phase the requirement was changed as follows:
- Fixed interval timing,
- Visual alert, Sound alert,
- Volume control,
- Vibrate alert,
- Ability to select alert type,
- Ability to mute sound and buzzer.
The solution uses a 08m in an existing case with a modified housing for the action button. I replaced the original pcb mounting the on/off switch and volume control in the same place as the original pcb. The solution is essentially:
- Power supply,
- Voltage regulator,
- Picaxe and the required resistors, Transistors and caps as appropiate,
- Switch with an appropiate mounting,
- Reuse of the speaker, on/off switch and volume control,
- Reuse of the high intensity LED and
- Reuse of a mobile phone vibrator