The Pololu Pushbutton Power Switch is a patented design
Isn't the "latching circuit" a microcontroller (running some firmware to read the button etc)?
Or, you could simply replace that microcontroller with a NC pushbutton "OFF" switch. That is how we did it back in the dark ages before whizzy micro-circuits.
There is no effective way of "patenting" an electronic circuit. As soon as you substitute one component or change a resistor value, it is a different circuit.
If you look closely at the photos, you will likely see the part numbers of the ICs, and the circuit is probably "borrowed" from one of the reference designs or application notes for the ICs.
Quote from: KE7GKP on June 21, 2011, 06:55:31 PMThere is no effective way of "patenting" an electronic circuit. As soon as you substitute one component or change a resistor value, it is a different circuit.I don't think this is true. For example, you can change the resistor value in a low-pass filter and the circuit is still functionally a low-pass filter. If you want to make a different circuit, I think you need to significantly change the way the circuit functions and/or accomplish something the original design does not. I'm not an expert on patents, though, so I could be wrong. All I know is I'm skeptical of your claim that patenting circuits is entirely ineffective.