Ohh, yea most of the "copper paths" are on the bottom, but to avoid crossings a few of them are on the top, and there is pads on both the top and bottom..
I just created the layout in "ultiboard" then my engineering-school fabricated it with professinal gear, i dont know exactly how they did it..
I think you should measure the DC voltage at the collector of the first transistor to see if its incorrect biasing causes it to be saturated or cutoff.
I thought of someting else.. right when i plug the battery in, LED1 goes on.. so could the transistor is activated all the time? And then ofc there will be no effect from the microphone..
I thought of someting else.. right when i plug the battery in, LED1 goes on.. so could the transistor is activated all the time? And then ofc there will be no effect from the microphone..
Do you see R6 that normally pulls pin2 of both 555s up to 9VDC? Do you see C2 between the collector of the first transistor and pin2 of both 555s that blocks DC at the collector from pulling down the pin2 voltage of both 555s?
At rest pin2 of both 555s are at +9V by R6. The collector of the first transistor should be biased at about +6.2V to +8.8V because it must be able to swing down to 3V or lower in order to trigger the pin2 of both 555s.
You should measure the collector voltage of the first transistor because it is not biased properly. Some transistors will be saturated and some transistors will be cutoff and will be affected by the temperature. It needs a bypassed emitter resistor and its base voltage divider adjusted to be biased correctly.
Did you add a "power-up reset circuit" to reset the counter?