Physio Therapy Timer

• A timer for physiotherapy exercises.
• This project was built to automate the timing of exercises that I help my wife with to keep her back in shape.
• The timer counts about 30 seconds for each leg and must be repeated 5 times.
• The unit contains a mercury level-switch and is started by turning the unit upside down.
• The beeper sounds once per second to indicate that the unit is running. The beeper sounds for a whole second when it is time to change legs.
• 3 seconds are allowed to change legs therefore the timer counts 33 seconds per leg.

Exercise Description:

• Consult your physician or physiotherapist before doing such exercises.
• Lay on your back. Lift one leg in the air 90 degrees to your back for 30 seconds. Switch to the other leg. Repeat for a total of 5 times.

Design:

• The schematic is drawn using xcircuit
• The program was assembled using gpasm
  • gpasm ptimer.asm
• The PIC16F84 was programmed using picp
  • picp /dev/ttyS1 16F84 -wp ptimer.hex
• Three AAA batteries are used for the power supply.
• A mercury level-switch (similar to those found in many thermostats) is used for the power switch.
• The unit does go to sleep when the timer is finished but it still consumes power, it is best to shut the unit off when done by tipping upright.

• entire project, PIC code and schematic (.tar.gz file).
• entire project, PIC code and schematic (.zip file).

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