I have two 555 timer chips. The 1st is used to create a transition every .1 seconds while the 2nd is used in a monostable configuration to debounce a button. When using my DLA to look at the output of the debouncing 555 timer, I am seeing small spikes in the output that correspond exactly with the frequency of the output of the other oscillating 555 timer. I have attached my schematic showing my interconnections. Note the schematic shows connections to a terminal block. However, in my breadboarded version I have a 100K Ohm resistor tied to positions 7 and 8 of the block and a button tied to 5 and 6.
It is also the case that the LED's along with current limiting resistors or NOT in my current circuit when I am doing this recording.
I have also attached a screen shot of the trace from my DLA.
The 555 timer I am using is the SA555 chip.
Any thoughts on how to prevent this would be greatly appreciated.