Need Help LOW frequency square wave oscillator circuit needed

[supermuble]

555 timer is the easiest, with two transistors. Very very easy.

You can produce a square wave positive going pulse waveform by removing the PNP transistor. Put the load between the collector on the NPN transistor (top side of it) and the positive lead. You can produce a square AC pulse by removing the transformer.

[dankie]

Hi

Use the cd4047 in free running mode , a guaranteed 50/50

Hookup the resistor and capacitor as shown in the datasheet .

Everything is self explanatory .

here is a nice circuit if you need this to work as an inverter .

http://www.circuitstoday.com/wp-content/uploads/2008/02/simple-12-to-220-v-inverter.JPG

[MileHigh]

Just use a standard 555 timer circuit with a larger capacitor and appropriate resistor.

MileHigh

[supermuble]

Here are the basic square wave DC pulse 555 timer circuits. For driving a load, just place a transistor on the output and feed it to the base of a transistor.