Here commercial providers of derby and regatta related goods and services can show off their wares, announce new products and/or advertise their website. Members can also discuss derby and regatta products/services here as well.
- Site Admin
- Posts: 4700
- Joined: Fri Jun 20, 2003 12:46 am
- Location: Highlands Ranch, CO
That looks like a good option for those timers and for a reasonable price. Would that work with other timers that don't have built-in IR illumination or would it really depend on the wavelength for the sensors used in those other timers?
Awana Grand Prix and Pinewood Derby racing - Where a child, an adult and a small block of wood combine for a lot of fun and memories.
- Posts: 14
- Joined: Thu Nov 10, 2005 9:03 pm
- Location: Roswell, GA
Yes, it would depend on a number of variables. One factor is the particular sensor and its peak wavelength and sensitivity (current produced for a given amount of light). Would also depend on the input circuitry on the timer - for example the resistance used and what voltage it is connected to. We pull-up to 3.3V, others may pull up to 5V. The pullup resistor is likely 1K up to 10K or more, I doubt anyone is below 1K Ohm. The sensor would have to produce enough current to work in the particular circuit topology.
Long answer to say yes, it depends.