This is the circuit board plus all parts needed for you to assemble the Dual Counter. This board primarily uses surface mount components. Please see the product description of the fully assembled Dual Counter for more information.

The Dual Counter board contains 2 independent active low external trigger inputs and each counter can be used for anything that has a switch closure like a rain gauge, water meter, etc. It uses the DS2423P 1-wire chip and it has a lithium battery that maintains the counters even when power is removed from the device. This battery should last many years.