atMega8L -- any external components required at all?

pico:

fungus:
and a 4.7k pullup resistor on RESET.

The internal pullup by itself isn't reliable? Surprising.

It's "weak". 30K to 60K ohms. In some situations that makes it unreliable.

And, the cost of a single 4.7K to 10K resistor is how much?