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Re: LED conversion Astra IIIB
From: John D. Howard
Date: 2016 Aug 25, 08:56 -0700
From: John D. Howard
Date: 2016 Aug 25, 08:56 -0700
Paul,
Next time, if you want to use a LED instead of a regular bulb, a method called Pulse Width Modulation is the best way to vary the intensity of a LED. It just turns the LED on and off very fast but at the same voltage ( 3 V. ). Very easy to build with a 555 timer chip and a few capasitors and resistors - or buy one. Use a pot to adjust the amount of time the LED is on vers off and the light goes from dim to bright. Use same battery for both lights.
Many DIY web sites show how it is done - look for Pulse Width Modulation :)
I like the way you made your bulb dimmer. Always more than one way to break an egg.
John H.
