Giving the choice between searching one of those out (which would require, like, excess Thought...not my strong point) and buying a charger, here's my debit card, Mr. Nearby Toolman. Don't wrap it up. I'll eat it here.
Many thanks.
Many thanks.
Just wondering...does anyone know if there's a way to charge 12V cordless tools (circ saw & drill) directly from the 12V RV system, or does it have to go through an inverter to the charger and be converted back again?
All right...many thanks to you all...but let's go a little further here if I may. As someone whose knowledge of electricity is basically "ow. that hurt. I'm going to lay here on the floor for a bit until that tingling feeling goes away and I don't feel like barfing anymore," my question was based on simplicity of moving electrons. I figured (okay, you're right, Guessed) that going straight to the battery to do the charging was less drain on it than going through an inverter to do the same thing. Michael Faraday I ain't, obviously. Does the inverter cause any drain in the equation?
The typical voltage regulator is a linear device and the most inefficient approach. For instance, if you need 9 volts at 5 amps you would be consuming 60 watts from the 12 volt source to generate 45 watts for the 9 volt device. The excess 15 watts is dissipated in heat.I'm currently working on making regulated power adapters for my portable music gear that runs off DC. I've a lot of devices that are 9V and 12V DC.
So basically I just need to make little boards with a couple capacitors and a voltage regulator.
I looked into those, but on the audio electronics message board I frequent all the old guys warned me off.The typical voltage regulator is a linear device and the most inefficient approach. For instance, if you need 9 volts at 5 amps you would be consuming 60 watts from the 12 volt source to generate 45 watts for the 9 volt device. The excess 15 watts is dissipated in heat.
You would be much better off using a DC-to-DC converter which converts DC to high frequency AC then rectifies and filters that back to DC. Here's an example of the type available on Amazon:
https://www.amazon.com/HiLetgo-Lithium-Battery-Charging-Converter/dp/B01EQT63SS/ref=sr_1_42?crid=SGDQU7HE5LWB&keywords=dc-to-dc+converter+5+amp&qid=1648034736&sprefix=dc-to-dc+converter+5+amp,aps,421&sr=8-42
Your use is a good example where a linear regulator is best, but when higher current is required or when the output voltage needs to be higher than the input voltage the only option is a DC-to-DC converter. Here's a link to an article that explains the differences:I looked into those, but on the audio electronics message board I frequent all the old guys warned me off.
I'm powering guitar pedals and drum machines that draw less than an amp. So the inefficiency isn't significant.
Certainly not enough to get me into switchmode power devices and the whole debate over whether the HF carrier is sufficiently filtered.
Also there are low loss linear regulators, and they are much cheaper than DC DC converters.
Enter your email address to join: