With this interval timer it is possible to close a switch for a short time after a delay time continiously. This is useful to release the shutter for a camera or to control a slide show automatically.

Functional Description
The interval timer works with an integrated ciruit NE555 or for reduced energy with the TLC555. During the ON time of about 850ms the relays closes the switch contacts. The OFF time is adjustable from 23 to 95 seconds. The voltage of the power supply should be between 4.8V and 9V.

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©2015 Harald Prinzler