99 hour 59 minutes Countdown/Up Timer Module with LED Back-light
This is a 99 hours 59 minutes countdown/up timer, with 1 second resolution, and one minute minimum setting interval. Due to the available of count up feature, it can be used as a chronometer.
As well as amber color, yellow, green, and white colors are available for the back-light too. 2 pieces of AAA (UM4) battery holder is mounted on the back for testing purpose only. Due to LED consuming power to high, suggest to connect power source externally. Requested power is 3.3 VDC. Audible or pulse output poles are available. This is an ideal module for full function evaluation.
Audible endless alert method is so called PSEA (Power Saving Endless Alert ): Beep 6 times, then wait for 10 seconds, and repeat again. Never stop alert, unless "STOP" button is depressed.
The module also provides open collector output pole to allow people use it to control other power operated device.