Walter Wing's Discussions (27)

Discussions Replied To (18) Replies Latest Activity

"Circuit design is always a question of trade offs.  If the output impedance of the p…"

Walter Wing replied Sep 15, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"Did you try the original resistor values without the LED ? If you want to use the LE…"

Walter Wing replied Sep 5, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"You should see almost 5V at the USB connection. You don't need to connect the camera…"

Walter Wing replied Sep 5, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"That's pretty much what I would have expected to see based on basic transistor theor…"

Walter Wing replied Sep 5, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"If you want to add an LED, change R2 to 1K ohms and put the LED in series with it.…"

Walter Wing replied Sep 4, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"I don't believe that will work as your have drawn it.   All of the circuits publishe…"

Walter Wing replied Sep 4, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"The circuit that uses two transistors ( BC547 &  BC557 ) is needed when the came…"

Walter Wing replied Sep 4, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"At the low voltages involved ( 5V or less ) either transistor will work fine.  If yo…"

Walter Wing replied Sep 3, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"Thanks for that note.  That means the total cost to someone on the west side of the…"

Walter Wing replied Aug 17, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

"Nice looking solution. But at $75 US$ (plus international shipping) it's going to be…"

Walter Wing replied Aug 17, 2015 to Using AUX pins as relays for CHDK

455 Jul 10, 2017
Reply by rupesh chandrawanshi

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