need minature circuit board design that uses a recorded sound chip (like for greeting cards), plays short track every 5 to 10 minutes on a small flat piezo speaker using solar power and a small battery for a 6 month life. need on-off switch and LED indicator
13 freelancere byder i gennemsnit $170 på dette job
Please go through our profile fully to know about our line of activity and experience. We have more than 15 years of experience in designing and manufacturing custom built electrical and electronics devices.