12volt to 1.5volt.
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=59249
Printed Date: May 14, 2024 at 3:36 AM
Topic: 12volt to 1.5volt.
Posted By: Audioman013
Subject: 12volt to 1.5volt.
Date Posted: July 11, 2005 at 8:50 PM
What size resistors do I need to achieve this? Do you think this is possible? Thanks for your help in advance.
Replies:
Posted By: geepherder
Date Posted: July 12, 2005 at 6:56 AM
Yes you can do this with resistors, but it's not as simple as you may think. Any resistor can drop any voltage any given amount. It depends on the total resistance of the circuit, and a few other variables such as current and power demands. If you tell us what you're trying to do, I'm sure someone here can help you out much more. I pop my head in here when I can, but you'll find plenty of more helpful/knowledgeable members here.
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My ex once told me I have a perfect face for radio.
Posted By: Audioman013
Date Posted: July 13, 2005 at 7:15 PM
I'm trying to hard wire an MP3 player on my buddys street bike. It uses only 1 AAA battery. If I can do this than we will use it or if not then he will get an iPOD. Thanks again.
Posted By: geepherder
Date Posted: July 13, 2005 at 8:19 PM
A simple bleeder resistor in series, with the mp3 player, and a zener diode rated at 1.5 volts will do it. I'm not great at explaining these things, so do a search on google for zener diodes.
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My ex once told me I have a perfect face for radio.
Posted By: Audioman013
Date Posted: July 13, 2005 at 9:34 PM
Thanks.
Posted By: Ween
Date Posted: July 13, 2005 at 10:54 PM
hi, you might not find a zener rated at that low of a voltage. might be able to use a few 1A diodes in series instead. you'll need to know the current draw of the player also to set up the regulator circuit properly. hope this helps, mark
Posted By: Mad Scientists
Date Posted: July 16, 2005 at 11:57 AM
Use a standard voltage regulator instead.. the problem with using a resistor bridge is that your input voltage does change; a zener diode is better, but uses more power. Jim
Posted By: Evolution-UK
Date Posted: September 18, 2005 at 6:26 PM
or buy a 12v multi-voltage adapter from your local electrics store.
https://www.maplin.co.uk/Module.aspx?ModuleNo=45348&doy=19m9D
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