I am in need of a non surface mount 500khz square wave oscillator. I have searched my usual electronic supply websites, but have been unable to find it. A 555 timer is not suitable for my project.

 

Buy a 1MHZ oscillator and connect to a flip flop. It will be perfectly square and exactly 500 k Hz.

 

Ditto. I have some 1MHz crystal oscillators and a simple ÷2 would give 500kHz.

 

PIC 16F1503 + SMD adapter. So it has PDIP connections.

It can be programmed with a few lines assembler to output 500 KHz all the time + do nothing by itself. With a crystal or without...

Or some smaller PDIP8 PIC will even do.

 

Just curious, why will a 555 or a CMOS 555 not work, frequency stability?

 

I would use a CD4060 14 stage ripple counter, with a 8Mhz crystal clock, take the output from the first divider pin 7 @500Khz.


or a 16Mhz crystal and use pin 5 @500khz.

 

I recently tested a 1mhz oscillator connected to a jk flip flop. The circuit worked correctly with a push button, but when I connected the oscillator it would always output 0v. What could I be doing wrong? I checked the connections and they seemed alright.

 

Post your circuit. Photo of Actual circuit and a hand/computer draw schematic.

 

Here is my schematic http://i1070.photobucket.com/albums...F-AFB3-427F-B76F-064E2A4F4D88_zps2pptkzrt.jpg

 

You didn't label what your J-K flip-flop is. Is it a 4000 series, or a 74 series? We need the exact part number.

 

It is a CD4027BC. I have been noticing unusual behavior with it. It will toggle with a push button, but it outputs a constant voltage of 0 for about 7 seconds at startup.

 

I solved the issue. I moved the circuit to the opposite side of my breadboard and it worked properly. Either my breadboard has faulty connections or I wired it incorrectly the first time.