An optoisolator replacement for 2n2222 - Electronic Circuits Projects Diagrams Free

William At MyBlueRoom · 12th May 2006, 05:36 PM

I'd like to find a suitable optoisolator to replace the 2n2222 transistor in this schematic.

It has to pass 120kHz (X10) a 6N135 might work not sure how to bias the base base on the output transistor.

**Nigel Goodwin** · 12th May 2006, 05:48 PM

Quote:

Originally Posted by William At MyBlueRoom

I'd like to find a suitable optoisolator to replace the 2n2222 transistor in this schematic.

It has to pass 120kHz (X10) a 6N135 might work not sure how to bias the base base on the output transistor.

Why do you want to do this?, the 0.1uF already isolates it from the mains.

William At MyBlueRoom · 14th May 2006, 05:51 AM

I wanted to isolate the circuit, turns out to be cheaper to buy a TW523 from X10. It's a TTL to X10 adapter with optoisolation and generates the 120KHz on its own. I've modified my Ladybug schematic (rev K) to accomodate it.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

14th May 2006, 05:51 AM	(permalink)
William At MyBlueRoom	I wanted to isolate the circuit, turns out to be cheaper to buy a TW523 from X10. It's a TTL to X10 adapter with optoisolation and generates the 120KHz on its own. I've modified my Ladybug schematic (rev K) to accomodate it. __________________ Bill Home of the Firefly PIC Tutor Inchworm ICD2 http://www.blueroomelectronics.com