Join devRant
Do all the things like
++ or -- rants, post your own rants, comment on others' rants and build your customized dev avatar
Sign Up
Pipeless API
From the creators of devRant, Pipeless lets you power real-time personalized recommendations and activity feeds using a simple API
Learn More
Search - "h bridge"
-
!rant
Four hours of work.
You think you write spaghetti code? I write spaghetti wires.
H-Bridge dual motor tester for stepper motors.
Speed is controled by pot.
H-bride are L293D.
My third board, and the first that won't go to the trash.
Question. With the baterry off the motor continues spinning with the 5v from arduino.
My question is, is the L293D suposed to do that? Or do I have a short circuit somewhere that is giving power to the motor? Meaning it can burn the arduino.
Runs a 12v stepper from a CD-Rom driver perfectly at 5v from the arduino and actually starts to act strange when I turn the 12v on. (maby the circuit it's adding 12v + 5v?)
24 -
Hey guys.
Arduino + Bluetooth + L293D + car Chacis and 4 DC motors.
Finaly finished my second bot/Drone.
Actually finished it yesterday but had lots of problems with hardware bugs (learned so fucking much in a day).
Tought I fucked two unos with bad soldering... No they are fine, just won't turn on in the circuit that was already working (was fine running the code).
Redone everything from scratch with a arduino uno, it's perfect now.
Funniest part is how I got my hands on a 50€ car kit for almost free... So some Chinese store sended this kit instead of some cheap stuff. Saved another arduino with the chip rack (that one that you can trade the atmega chip), I'll save it to program single chips. Plus a h bridge and lot lot more cool stuff.
Used only the Chacis.
Next: esp8266 and camera... And maby a gun? Would be cool
32 -
Thanks guys for the help in the last weeks.
This is what I was so hard trying to print.
Btw... reminder to self, plastic expands. That's why the stepper has duck tape instead of screws lol
33 -
What's the most efficient motor driver for a small DC motor that I want to run off a 5V source for aurdino?
I previously had a L293D and it was inefficient as fuck, it got so hot that almost burnt my finger, (ran it from a 12V supply) and it dropped a good 2 volts from power supply to motor.
Is there a good enough off the shelf driver or do I have to make a H-bridge myself using MOFSETs?6 -
I subscribe to many copywriting newsletters. Here's an article that shows how it's like on "the other side", marketers struggle, too.
How Kevin's Massive Mistake
Completely Changed His Life
Kevin H. made a huge mistake.
The biggest, he would say, if he could tell you himself.
And he knew it immediately.
It was, he said, "instant regret."
Within milliseconds, he was asking himself "What have I done..."
Kevin, see, had just jumped the rail of the single most popular suicide spot in the world, the Golden Gate Bridge.
On average, the site gets another distraught jumper every two weeks. Kevin was one of them.
It wasn't like he hadn't tried to quiet the voices in his head. Therapy, drugs, hospitalization.
Time to die, those voices still said.
And yet, in the minutes his bus dropped him off at the bridge, he hesitated and paced with tears in his eyes.
"I told myself if just one person comes up to me and asks if I'm okay... if one person asks if they can help... I won't do it. I'll stop and tell them my whole story..."
But nobody did, so he jumped.
It was in those next milliseconds, he would later say, he knew it was the biggest mistake of his life.
He didn't want to die.
But now, he was sure, it was too late.
From its highest point, it's a 245-foot plummet into the icy bay waters below.
Out of the 1,700 people that have jumped from the bridge since it first opened in 1937, only 25 have survived.
Kevin, against all odds, would be one of them.
He slammed into the water like hitting concrete. Three of his vertebrae instantly shattered.
When he surfaced, he couldn't hold his own head above water. But, incredibly, a sea lion kept pushing him up.
The Coast Guard soon arrived and pulled him out.
From there, he began a long recovery that required intense surgery, physical therapy, and psychiatric care.
While still under treatment, a priest urged him to give a talk to a bunch of seventh and eighth graders.
Afterward, they sent him a pile of letters, both encouraging and full of their own pained thoughts.
He also met a woman.
Today, Kevin lives in Atlanta and he's been happily married for the last 12 years.
And he tours the country, sharing his story.
So why re-tell it here?
Obviously -- I hope -- you don't get lots of copywriters looking to snuff it after a flopped headline test.
Just the same...
We've talked a lot in this space about the things one needs to get by in this biz.
My friend and colleague Joe, over at the publishing powerhouse Agora Financial, likes to list requirements.
You need intense curiosity...
You need a killer work ethic...
And you must, MUST have... resilience.
Meaning, you must have or find the capacity to bounce back from failure and flops, even huge ones.
Now, again, Kevin's story is an extreme and in this context -- I hope -- a hyperbolic example of somebody giving up. In the worst way possible.
It is also, though, a metaphor.
See, I get a lot of notes from some of you guys... and at conferences, I get to talk to a lot of people...
And I often get the sense, from some folks, that they're feeling a little more overwhelmed than they let on.
Some are just starting out, and they've got a lot on the line. For some, it's everything. And some are desperate to make it work.
Because they have to, because their pride or livelihoods or a family business is at stake, because it's a dream.
And yet, they're overwhelmed by all the tips and secrets... or by piles of confusing research or ideas...
For others, even had some success, but they're burned out, feel antiquated, or feel like "imposters" that know less than they let on, in an industry that's evolving.
To all those folks... and to you... I can only say, I've been there. And frankly, go back there now and again.
Flops happen, failures happen. And you can and will -- even years and decades into doing this -- make the wrong choices, pick the wrong projects, or botch the right ones.
The legendary Gene Schwartz put it this way, according to a quote spotted recently in fellow writer Ben Settle's e-letter...
" A very good copywriter is going to fail. If the guy doesn't fail, he's no good. He's got to fail. It hurts. But it's the only way to get the home runs the next time."
Once more, nobody -- I hope -- is taking the trials of this profession hard enough to make Kevin's choice.
And believe me, I don't mean to make light of the latter. I just want to make sure we hit this anvil with a big hammer. To drive home the point that, whatever your struggle, be it with this biz or something bigger, that you don't want to give up. Press on.
As Churchill put it, "Success, is the ability to go from failure to failure without losing your enthusiasm."
Or even more succinctly when he said, "If you're going through hell, keep going."
Because it's worth it.
.
John Forde -
Hey guys
question for the hardware guys.
How can I run a brushless motor without a ESC ? like a CD-Rom brushless motor.
Can I do it with an arduino + h-bridge or maybe an ULN2003A??
Thanks32 -
FOR SCAM/FAKE INVESTMENT, HIRE SOLACE CYBER WORKSTATIONS FOR RECOVERY
I was tricked by a fake cross-chain crypto bridge scam that cost me a huge loss of 87 ETH. I first came across the bridge through Twitter, where it was heavily promoted as a trustworthy service for converting assets into wrapped tokens across different blockchains. The advertisements seemed convincing, so I trusted them and decided to deposit my ETH. At first, everything looked normal. I expected to receive the wrapped tokens shortly after my deposit, but those tokens never arrived. After waiting and checking multiple times, I realized I had been scammed. The funds I sent were stolen by the scammers, who never intended to provide any legitimate tokens. It was devastating to see such a large portion of my investment disappear with no way to reverse the transaction. I reached out to Solace Cyber Workstations, a company known for helping victims of crypto theft recover their funds. Solace Cyber Workstations immediately began investigating the fraudulent smart contract behind the fake bridge. Using their expertise, Solace Cyber Workstations traced my stolen ETH through the blockchain and discovered the funds had been transferred to a deposit address on Binance, one of the largest cryptocurrency exchanges in the world. Solace Cyber Workstations worked closely with Binance and legal authorities to apply pressure and successfully freeze the stolen funds. I was cautiously hopeful because I knew recovering crypto after a scam is often complicated. Thanks to the relentless efforts of Solace Cyber Workstations, they managed to recover all 87 ETH that were stolen from me. Getting back everything I lost was a huge relief in the crypto space. The whole ordeal was overwhelming, but knowing that Solace Cyber Workstations was on my side made all the difference. If you ever fall victim to a crypto scam, don’t give up. Solace Cyber Workstations can help you track down and recover your stolen funds. Reach out to them with the information.
Website: h t t p s : / / s o l a c e c y b e r w o r k s t a t i o n s . c o m
Email: S o l a c e . c y b e r . w o r k s t a t i o n s @ m a i l . c o m
WhatsApp: + 1 2 4 0 7 4 3 7 6 8 915 -
RECOVERING FUNDS FROM FRAUDULENT INVESTMENT WEBSITE HIRE ADWARE RECOVERY SPECIALIST
The future was mine to shape. I had $675,000 in Bitcoin tucked away—fuel for my regulatory tech startup, designed to bridge the chasm between crypto’s anarchy and the rigid grip of government oversight. For once, I thought I had everything lined up. But then came MiCA—the EU’s Markets in Crypto-Assets regulation—dropping like a divine gavel. Overnight, my exchange account was frozen tighter than a tax audit, and my dreams of “simple compliance” were buried under an avalanche of bureaucracy.
For a week, I flailed in a purgatory of legal jargon and sleepless nights. Terms like “AML Directives” and “KYC enforcement” blurred together as I battled to stay hopeful. My startup was stillborn, a sandcastle erased before the tide had even turned. WhatsApp info:+12 (72332)—8343
I clung to the Bhagavad Gita: “It is better to live your own destiny imperfectly than to live an imitation of someone else’s life with perfection.” But what was I living now? Not destiny—just defeat.
Then fate arrived—wearing a name badge. At a Europol cybersecurity summit, over stale pastries and lukewarm coffee, a compliance officer leaned in and whispered a name: ADWARE RECOVERY SPECIALIST. Her voice lowered with reverence. “They don’t just recover lost crypto,” she said, “they navigate regulations like Krishna on the battlefield.”
I reached out that day. Website info: h t t p s:// adware recovery specialist. com
From the first call, their team exuded both technical brilliance and legal fluency. They didn’t just understand blockchain—they understood bureaucracy. They worked directly with my exchange, leveraging my compliance documents and crafting arguments laced with regulatory nuance. No brute force—just legal kung fu. Email info: Adware recovery specialist (@) auctioneer. net
Every day brought updates, each one a balm. “Patience is bitter, but its fruit is sweet,” one advisor told me, as I counted the hours. On day 14, the fruit ripened. My funds were released, glinting in my digital wallet like a blessing from Lakshmi. Telegram info: h t t p s:// t. me/ adware recovery specialist1
But ADWARE RECOVERY SPECIALIST didn’t stop there. They secured my accounts with fortress-grade protection, brought me up to speed on evolving regulations, and helped lay a foundation that no wave could wash away.
Now, my startup is alive. Our platform helps others navigate the MiCA labyrinth. When people ask how I survived my first encounter with regulation, I smile and say, “There are ADWARE RECOVERY SPECIALIST among us. They just wear suits.”
So if you’re caught between red tape and a hard place, call ADWARE RECOVERY SPECIALIST . Sometimes, salvation isn’t a miracle—it’s just a well-written email.
1 -
RELIABLE TRUSTED CRYPTO RECOVERY SERVICES CONTACT FUNDS RECLIAMER COMPANY
Farming is iffy at the best of times, but I could have never foreseen the day that a lightning strike landed on the metal side of my hardware shack and incinerated the hardware wallet that held the key to all of my Bitcoin savings that had a grand total of $160,000. I stood out in the rain with the burnt-out shell of warped metal and wood, feeling that I had lost a lifetime of financial stability with it. I shivered with trepidation as I rummaged within the ashes to seek out the melted shreds of the digital savings bridge that I had put into the care of it. Panic gripped me with a fierceness that no famine had ever triggered. Money was the insurance policy fund, cushion fund, plan to enlarge the farm larger, the destiny of the family of mine. I had failed them somehow. I tossed about all night with visions of debt and of the loss of the house spinning round the head of me. The next afternoon at the ag conference (more out of habit than hopes), I stood next to a speaker while I was eavesdropping on him say the name of FUNDS RECLIAMER COMPANY carelessly while talking to someone between talks. I was interested and desperate so I followed him later to introduce himself with a quavering voice. I contacted the FUNDS RECLIAMER COMPANY that afternoon. From the very beginning of the call, their staff treated my case with the professionalism of seasoned experts aware of the personal and the technical worth of the loss I had experienced. They were not merely examining a burnt wallet; they were examining a farmer with his means of support by a thread. Their experts treated the broken hardware with the tenderness of a priceless germ sample. With the skill of meticulous techniques, they recovered my personal keys out of to me a junk pile of useless electronics. With each update they made, they were a lifeline that kept me afloat away from financial destitution. Ten tense days had passed when I got the call: the wallet had been recovered. I was about to drop the phone in the barn with the news. I was overcome with relief that I knew that the savings were intact. The farm could carry on, and the future of the family was secured.
FUNDS RECLIAMER COMPANY recovered not just information but also hope. They turned disaster into resilience, something I will forever be thankful to them for.
Email: fundsreclaimercompany@ z o h o m a i l . c o m
WhatsApp:+1 (361) 2 5 0- 4 1 1 01
