SecondLaw
SecondLaw
@secondlaw
Eminent Member
Joined: 2021-01-25 11:57 am
Last seen: 2022-01-01 11:50 pm
Topics: 2 / Replies: 17
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RE: Power supply, etc.

Amazon has a 12V 15Ah Lifepo4 battery for $67 USD with good balancing electronics. Operating range 3.0–4.2V/cell (x4). It has low self-discharge rate...

1 year ago
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RE: Need help to dampen PCBs/components in rowdy robot

@robotbuilder Sounds like you get my issue. No bumpers, but that would probably be smart. I should get the repaired motor controller soon and I'll try...

2 years ago
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RE: Need help to dampen PCBs/components in rowdy robot

@robotbuilder Thanks for the response. I assume the jarring is the robot stopping and stopping quickly, or just generally while it is mobile. I need t...

2 years ago
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RE: ATX Bench Power Supply - Convert a Computer Power Supply

Simple Alternative if you already have your PS built. FYI: Add an inexpensive buck 12v to 9v converter (I used a variable and set to 9v). Only cost a ...

2 years ago
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RE: New member - Phil

Hello and welcome, Phil, can you be more specific about your difficulty? Seems this happens most often when the user does not properly connect via the...

2 years ago
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RE: Is DroneBot Workshop's teaching enough for becoming a Robotics Designer or is there more to learn ?

First of all, I find it very cool that you are here and asking questions. Stick with it. Try to think of learning as a never-ending journey with two p...

2 years ago
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RE: ATX Bench Power Supply - Convert a Computer Power Supply

@derek Not sure I get it completely. Seems the ATX PS would be overkill vs a simple step-down converter powering the 180081. Maybe I am missing someth...

2 years ago
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RE: ATX Bench Power Supply - Convert a Computer Power Supply

@theoutlander. That’s great. Have fun. If I ever do another one, I’d have two 12v and two 5v since that need does periodically arise. The -12v hasn’t ...

2 years ago
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RE: PCB Design

I'd like that. My oscilloscope IQ is lacking. Making the logical connection between working on a real project with PWM and actually knowing how to lev...

2 years ago
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RE: ATX Bench Power Supply - Convert a Computer Power Supply

While my wife rarely comes into my workshop, anything LED and she quotes an article she read about eye damage looking directly into bright LEDs. I had...

2 years ago
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RE: ATX Bench Power Supply - Convert a Computer Power Supply

Thanks! I used what I had for LEDs and they were way too bright. So instead of swapping them out, I added the pot to adjust intensity. Yes, an overkil...

2 years ago
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RE: ATX Bench Power Supply - Convert a Computer Power Supply

@hstaamThank you! So far, it has been useful, not having to set my main power supply for voltage on different types of needs. The grounds are all atta...

2 years ago
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RE: ATX Bench Power Supply - Convert a Computer Power Supply

Hey Bill, Your power supply video was the first one of yours I watched. Your calm demeanor and non-judgmental approach encouraged me to not only bui...

2 years ago
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RE: Hello, I'm Don (SecondLaw) from LA area, California

@robotbuilder Wow, excellent. Right when I think I know something, I realize how much there is to learn. So fun talking with people who don't start ev...

2 years ago
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