M
Michael Kennedy
Guest
May be wasting my time if everyone still killfiles Google but here we go.
I need to make a DTDP analog switch work with a few second delay after receiving input.
I was thinking about a 555 and some kind of analog switch.
For example, I have a usb cable I will plug into a tablet. It needs to short the D+ and D- pins (on the cable going to the tablet) together for a couple of seconds then connect the the D+ and D- (from a usb hub).
You can read my description below or look at the circuit I drew here.
http://tinypic.com/r/3326wpf/8
The hub will provide power to charge the tablet, but to put the tablet into charge mode you need to short the pins first. After that you can disconnect the short and it will continue charging. Switch in the USB hub's data lines and everything is working. Charging and connected to a hub all on one USB port.
I need to make a DTDP analog switch work with a few second delay after receiving input.
I was thinking about a 555 and some kind of analog switch.
For example, I have a usb cable I will plug into a tablet. It needs to short the D+ and D- pins (on the cable going to the tablet) together for a couple of seconds then connect the the D+ and D- (from a usb hub).
You can read my description below or look at the circuit I drew here.
http://tinypic.com/r/3326wpf/8
The hub will provide power to charge the tablet, but to put the tablet into charge mode you need to short the pins first. After that you can disconnect the short and it will continue charging. Switch in the USB hub's data lines and everything is working. Charging and connected to a hub all on one USB port.