So this is a circuit what I need:
1. Takes signal from a small microphone
2. Gives an output of +[url removed, login to view] when signal from mic breaks threshold
3. Output drops to 0 when signal returns under the threshold
4. I supply +[url removed, login to view]
5. Frequency up to 100KHz
6. Threshold to be adjusted by some resistor or capacitor etc.
7. Please also specify components. All components should come from UK supplier. For example DigiKey has good range.
I just need a circuit diagram with specified components.