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Electronic Kit & Parts for Educators, Researchers & Hobbyists

Switching Diode 1N914
$.25 each Add to Cart

Because the 555 CMOS Timer can burn out if the 9-Volt battery is touched backwards on the battery clip, it is wise to add a 1N914 Switching Diode to the circuit. This diode allows a current to flow in only one direction. If the battery is ever touched backwards when changing a battery, the circuit will be protected by the switching diode. The diode has a positive and ground end (which is marked by the black band on the diode). The photo below shows the black band near the right side, meaning that the right lead wire in the photo below is the ground. If you intend to use the switching diode with our breadboard kit you simply replace the small red jump wire from J8 - (+) with the diode. The black ground end of the diode is placed near pin 8 of the 555 CMOS Timer (J8), and the positive end is placed into the (+) row of the breadboard.

Switching Diode 1N914
$.25 each Add to Cart

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