The circuit can also be powered by a 12V battery. The transformer output is rectified by full-wave bridge rectifier BR1, filtered by capacitor C1 and regulated by IC1. The 230V AC mains supply is stepped down by transformer X1 to deliver the secondary output of 12V, 250 mA. The power supply is built around transformer X1, bridge rectifier BR1, capacitor C1 and 12V voltage regulator IC LM7812 (IC1). The circuit can be divided into two sections-power supply and timer. The circuit provides selectable time settings of 1, 2, 5, 10, 15 and 30 minutes, and can be used for domestic as well as industrial applications. To exit the EXTENDED ON state at any time, press any timer button or OFF button.Using this 30 minute timer circuit you can switch on an appliance for a desired time. The timer will automatically turn OFF after 24 hours. Yes, press and hold the top button for 5 seconds to override and keep the timer in an EXTENDED ON state. Is there a way I can keep the fan or light on longer than the set times? Yes, the DT230 can replace a standard wall switch, however, it requires a neutral wire for installation. However, do not use to control lighting if it is the only light source in the area.Ĭan the DT230 countdown timer replace a standard wall switch? Note that using a countdown timer will only turn fan on and off, not variate the speed.Ĭan I use a countdown timer switch for lighting?Ī countdown timer can be used to control lights. Yes, press to turn the fan on for the specified time and it will turn off automatically. The DT230 can be used in multi-location applications with the DD0SR switch companion or used with another DT230 countdown timer.Ĭan a countdown timer switch be used for a ceiling fan? The second is if you need to control the same light or fan from multiple locations. The first is if you have a fan or light fixture that has a larger load capacity. There are two main reasons to use a 20A countdown timer. Do not use to control lights if there is no other light source in the spaceĬountdown Timer Switch Frequently Asked Questions Why would I need a 20A countdown timer?.Ideal to use for porch and landscape lighting, interior lights, bathroom exhaust fans, heat lamps, pool pumps, hot tubs, saunas, attic fans, and more.Change color with DTKIT faceplates available in white, ivory, light almond, gray, black and brown (sold separately).Override can be disabled by pressing one of the timer option buttons or off button Manual override keeps load on for 24 hours.Zero Cross turn-on technology to extend the life of the switch.Single pole, multi-way using DD0SR Switch Companion or multi-timer using two DT230 countdown timers.
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