Simple rectangular oscillator using CD4011 (Nand gates)

Posted by Ilias-Man On Saturday, February 11, 2012 4 comments
This circuit is a rectangular oscillator, that generates a square wave form, the circuit uses NAND logic gates, using  CD4011 (contain 4 nand gates), the generated signal can be used as an audio alarm (by connecting a speaker directly to the output), or amplified and used as an inverter...

rectangular oscillator simple cd4011

rectangular oscillator simple cd4011The enable input should be (+V) so that the circuit oscillates, if it's low, the output will remain at High (+V), If you do not need a controlled input, you can connect the two inputs of the two gates together and remove the connection between the first and the second gate. (like the picture)

rectangular oscillator simple cd4011

This may simplify the wiring.
Caution: the common point of the resistors and the capacitor is not grounded.



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Helios Alpha said...

Very interesting and helpfull. Dident know this was possible. is there perhaphs a way to modulate frequency by chaning resistor values ?

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