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Description
DPS digital input adjustable DC power supply 0-30V 0-5A 110V 220VDPS series digital input adjustable DC power supply, LED display mobile phone repair power test regulated power supply is designed for car, laboratory, school, production lines and electronic repair designed for use. Voltage stability is high, small ripple factor, has improved the short circuit protection and overcurrent protection. Due to the voltage value is a digital keyboard input, shorten the voltage setting time, completely overcome the
DPS series digital input adjustable DC power supply, LED display mobile phone repair power test regulated power supply is designed for car, laboratory, school, production lines and electronic repair designed for use. Voltage stability is high, small ripple factor, has improved the short circuit protection and overcurrent protection.Due to the voltage value is a digital keyboard input, shorten the voltage setting time, completely overcome the traditional potentiometer adjustment poor contact caused by voltage instability phenomenon. The internal power supply containing electronic switch, can conveniently open the output load.
Input voltage: 110V/220V ±10%50/60Hz
Output power: DPS-305BF 0 to 30V 0-5A
DPS-305BM 0 to 30V 0-5A
Option:
Option 1: DPS-305BM: BM: Four-digit display accuracy ±0.001A (1mA)
Option 2: DPS-305BF added function: BF: Five digit display，accuracy±0.0001A (0.1mA)
Power sound alarm function.
Mobile phone signal test.
More curren digit display.
Option 3: DPS-305CF added function: Five-digit display, newer version more than DPS-305BF, added Memory storage and password Memory lock function.
Added DC power Cable: 44 pcs power convert cables.
Value added function: a quick call 10 groups of voltage and current data and storing the user required 10 groups of voltage and current data, password lock keyboard, prevent misuse or vandalism operation.
Specification:
1: rated working conditions and dimensions:
Power supply voltage 220V + 10%50 / 60Hz ( 110V need to order )
Working conditions: 0-40 temperature relative humidity 80%
Storage temperature: - 10-70 C 70% relative humidity
Dimensions: 265 x 128 x 150mm ( D * W * H )
2: Regulated state parameters:
The voltage output from 0 to 30V can be continuously adjusted ( to distinguish the value of 0.1V )
The precision of output voltage: + 0.1V
Voltage stability: < 0.01%+3mv
Load stability: < 0.01%+3mv
Recovery time: 100uS
Ripple noise voltage: < 1mVRMS ( 5Hz-1MHz )
Temperature coefficient: < 300PPM / C
3: A constant current state parameters:
Constant current value: 305 CM 5A Ma constant current maximum 500 mA
303CM 3A Ma constant current maximum 500 mA
Constant current output current from 0 to the nominal value of continuous adjustable ( to distinguish the value of 0.01A )
Constant current output accuracy: + 0.01A ( MA constant current precision: + 1mA)
The current stability of the < 0.1%+3mA
Load stability < 0.1%+3mA
Ripple noise current < 3mARMS
4: Current and voltage display accuracy:
Voltage display accuracy: + 0.1V ( constant current state )
Current display accuracy: + 0.01A ( constant pressure )
Ma current display accuracy: + 1mA ( constant pressure )
5: Storage capacity:
Storage and call ten current, voltage data ( 305 / CM )
Initial has been deposited in the data: 1 keys ( 3V ) 2 ( 5V ) button button 3 ( 9V ) 4 ( 12V ) 5 button button button ( 13.8V ) 6 ( 15V ) 7 ( 18V ) 8 button button button ( 19V ) 9 ( 20V ) 0 ( 24V ) current key value is 5A, the user can arbitrarily settings change the desired voltage and current.
6: A voltage step range:
10V / 1V / 0.1V lifting voltage step
Three panel features
In 1, the front panel
Current display window
Voltage display window
Data entry keyboard ( double function keys are: 0 / mA decimal point / latch / ENT / password 4 / stepper
7 / 8 / 9 step step / step / step 2 / 1 step 3 / step )
Constant voltage / ENT indicating lamp
Constant current lamp
Output indicator
Ma status indicator
Power switch
Output ports:" -" negative polarity ( black )
GND: ground earthing terminal ( green )
Output ports:" +" the positive ( red )
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.6 ★★★★★
Based on 1005 reviews
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Product Reviews
★★★★★ 5
Great book for learning about startup culture.
Format: Paperback, Format: Paperback
I had this book for a while did not have the chance to read as soon as I got it. Recently finished reading it and learned a lot of great things about startup terminology and how to be fast and how to iterate things in a right way, how to go deep in the problem. Identify pain points for the problem etc. Overall great teacher for anybody who wants to get grasp of a being in startup world.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
★★★★★ 5
Solid advice
Format: Paperback
Nice foundational advice to help one stay motivated and not so overwhelmed.
Good read!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026
★★★★★ 5
Learning Faster, Failing Smarter
Format: Paperback
This book is truly amazing. Each chapter offers so much to learn. It helped me review what I’ve missed so far, anticipate future challenges, and prepare ways to reduce the chances of failure.
It reminded me that failure is inevitable, but the speed of learning, adapting, and retrying makes all the difference. I learned that luck comes through action, ownership is everything, and true success lies in persistence and focus. The book also emphasizes solving real problems with humility, data, and continuous iteration. I’m truly grateful to have found this book — it changed the way I think about challenges and growth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 13, 2025
★★★★★ 5
You NEED this book!!
Format: Kindle
If you are involved in a startup, or thinking about getting involved this is a must read. Jame's doesn't just rely on his own experience, he has been advising founders for years and does this with close relationships, not boardroom pontification. His blunt approach is balanced with his caring critiques. You can read dozens of books on startups and find out, when you actually are in one, how little applies to you. This is not that. Must read!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 1, 2025
★★★★★ 4
Excellent book with a lot of solid advice
Format: Kindle
I thought this was an excellent book. It gave great advice that I found really helpful in thinking about and planning my startup, as many of the other comments have noted. The key ideas as far as I remember are that a) you should talk to as many potential users as you can and find out what their problems are, and b) be laser-focused on solving those problems instead of building what it is you want to build, because the thing you want to create might not be the thing that they want to buy. In fact I did just that; I talked with just one potential user and found that what I had thought would be their big problem wasn't a problem at all for them, and looking at some hard numbers as he advises, it isn't a problem for the industry as a whole, either. I had to go back and reformulate my approach. I now have a 100% better value proposition for them.
Just two words of caution:
1) The book assumes that your startup is an app of some sort. Much of what he's talking about is therefore specific to the tech business. Mine isn't. Mine is a real product that people can hold in their hands. That wasn't a deal breaker by any means as most of the lessons in the book are still applicable to my product and what I'm doing. Still, it would've been nice of him to acknowledge that someone's start-up may be a lemonade stand or something material and concrete like that.
2) Is the vulger language necessary? I mean, English isn't like some other languages where there's an enormous difference between the way a language is written and the way it's spoken, but still, do we need so many obscenities in a book on business? It reads in some places like you're in a bar with a tech bro who's had a few drinks and is lambasting your approach to your business. I could've done without all the four-letter-words. But maybe that's just my generation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 2, 2025
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