Public Lab Research note

This is an attempt to replicate an activity.

Idea for<$5 analog thermal fishing bob

by warren | June 07, 2014 20:18 | 90 views | 1 comments | #10538 | 90 views | 1 comments | #10538 07 Jun 20:18

Read more: i.publiclab.org/n/10538

Using 555 timers and no Arduino... Only red/blue LEDs!

1 Comments

  
mathew commented almost 5 years ago

I take it the idea is to get the red/blue flashing really fast, making a gradient red-->magenta--->blue depending on the resistance of the thermistor in the 555 control circuit?

I like this a lot. Thermistors are non-linear in their response, so tuning this to different temperature ranges is going to require some thinking, but its a really excellent idea.

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