wife and i have an idea but are stumped on the electronic part. we are looking to find or build a small timer. this time will have the ability to sound an alarm every 15, 30, 45, or 60 minutes. we thought of a stop watch but we don't need all the extra functions. can you built something like this for cheap? can you purchase a "blank" digital watch and program it for your needs. any help would be great. thanks.