# Accurate 1 kilohertz square wave frequency generator schematic

This is a simple, accurate 1 kHz square wave crystal oscillator circuit using frequency divider IC and crystal.

 PARTS LIST C1 22pF  ceramic C2 22pF ceramic C3 0.1µF mylar R1 10MΩ ¼W R2 220Ω 100Ω ¼W (R2 change to 100Ω because sometime circuit fail to oscillate) XTAL 8.192MHz crystal IC1 CD4060

Our circuit uses a CD4060 ripple carry binary counter to divide the crystal frequency. In this circuit pulses at IC1 pin 2 (Q13) divide by 213=8192. When we use 8.192MHz crystal we can get 1kHz square wave frequency output.

8.192MHz/8192=1kHz

R1 acts as bias resistor. R2 acts as a current limiting resistor.

1 kHz oscillator circuit output waveform

CD4060 pin configuration

CD4060 contains oscillator or astable  stage followed by a 14 stage binary counter/divider.

Above circuit works between 5v to 15v.

###### 10 comments on “Accurate 1 kHz Square Wave Crystal Oscillator Circuit”
1. hassan mwachuo says:

Its a good circuit, I have tried it and its working very well.

2. oscar says:

Great tiny cc! works well.A bit difficult to find xtal but ok in the end (radio ham fete…)

3. Marvellous says:

I Need A Mixer Digram Possibly Build With Jrc45508

4. Ger says:

If I change XTAL = 27Mhz , I will have 26367Hz in pin 14 ??, thank you.

• Floren says:

In theory yes, but some versions of the chip can not go higher as 10 Mhz. This one can reach 30 Mhz if using 15 volts. I have also seen diagrams without the current limiting resistor R2. Not tested it myself however.

5. Ger says:

PIN = 15 , sorry.

6. Kit Bates says:

Can someone please help me produce a circuit that can be produced en masse that generates an accurate frequency of 528Hz ± 0.1Hz.

7. sathya says:

require circuits to convert square to sine wave

8. sheekh says:

EXELLENT CIRCUIT , can you please give us how to divide32.768khz by five
thanks