Circuit controls intensity of reflex optical sights: 02/21/2002  EDN - Design Ideas / A popular category of aiming/pointing aids is the reflex, or "red-dot," sight. This system finds use in such diverse applications as astronomy, archery, and shooting. In the reflex sight, light from an internal source-typically a high-intensity red LED-reflects from a curved, transparent optical (reflex) element through which you view the target. .

Design a visible optical link for RS 232C communications: 01/09/03  EDN-Design Ideas /  The design in Figure 1 is a visible optical link for those who need to see the transmitted data. An isolation figure of more than 5000V is a bonus. Tests of the system used the COM input of a data-acquisition system, as well as a standard PC's COM port. The MC1489 converts the RS-232C data to TTL signals...

Experimental Data Transmitter for Fiber optics:

Experimental Fiber Optic Receiver:

Fibroptic transmitter :

LED Lamp Dimmer:

Optoelectronics Circuit Suite:

Point to Point Fiber Optic Links: National Semiconductor Application Notes,05-Aug-1995

Remote Switch uses No Power Fiber Optic Link: 10/10/96 EDN-Design Ideas

Sensor Derives Power From Laser over Fiber: 02/15/96 EDN-Design Ideas / PDF contains multiple circuits - scroll to find the one of interest

Simple CATV Upstream Fiber Optic Receiver Uses DC Pilot AGC: 01/20/03 Electronic Design - Ideas for Design / Upstream fiber links in a community antenna television (CATV) system are usually among the most difficult elements of the network to align properly. Set-top boxes and cable modems employ "long-loop" automatic gain control (AGC) (in other words,...

U Volt Sensitive Photodetector: