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Topic: bad design? (Read 3414 times) previous topic - next topic

polymorph

What MarkT said. And AnalysIR.

Don Lancaster ( www.tinaja.com ) won a patent lawsuit against Bell Labs over the use of an LED as both a transmitter and a receiver for use in fiber optic lines.

Phototransistors are bad news with fast signals. A PIN photodiode or an IR LED work much better.

Again, your simulated circuit isn't even similar.
Steve Greenfield AE7HD
Drawing Schematics: tinyurl.com/23mo9pf - tinyurl.com/o97ysyx - https://tinyurl.com/Technote8
Multitasking: forum.arduino.cc/index.php?topic=223286.0
gammon.com.au/blink - gammon.com.au/serial - gammon.com.au/interrupts

cjdelphi

Similar?  It's not supposed to be...

If I created a 10mv peak to peak, the first circuit fails!  (Back to working out how much voltage /can/ be produced from say a remote control .


Speed is not an issue, amplifying it without an opamp was hence my circuit (2nd circuit)

polymorph

Maybe you should tell us what you are trying to accomplish.
Steve Greenfield AE7HD
Drawing Schematics: tinyurl.com/23mo9pf - tinyurl.com/o97ysyx - https://tinyurl.com/Technote8
Multitasking: forum.arduino.cc/index.php?topic=223286.0
gammon.com.au/blink - gammon.com.au/serial - gammon.com.au/interrupts

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