Use a Microchip 12F675 to generate a one-off random on time delay between 30 seconds and 5 mins when started each time. Hardware has been designed and ready to go. Copy Send on Request
I am (my team) currently working on number of PIC microcontroller based projects. Have the required resources and experience to implement your requirement Kindly share more details Thanks
I checked my solution in proteus 8 simulation. First 30 seconds delay is approx 0.1s. Up to 5 minutes delay is max to 294 seconds. Randomization is taken from ADC from one of pins.