418 Results for "《〈 문의 OIO↗5793↗7458 》〉 셔츠룸후기た《〈 문의 OIO↗5793↗7458 》〉 ⑷plenty㎋셔츠룸후기셔츠룸후기んteeth 셔츠룸후기선릉셔츠룸 강남셔츠룸￦셔츠룸ⓤsilverⓞ"

AUX power supply PCB modifications
Log from DIY programmable (SCPI) bench power supply
New Auxiliary power supply board (r5B6) required for the revised Arduino shield board is finalized. It includes few minor changes as follows: 4-pin "power" connector is replaced with 6-pin IDC connector for power (+5V) and signal lines (PWR_DIRECT, PWR_SSTART,...

New PCBs, cooling, customized enclosure...
Log from DIY programmable (SCPI) bench power supply
A lot of things have happened recently so I'll mention some that could be interesting for people who follows this project.First, one follower of this project decided not to wait anymore and ordered his batch of PCBs based on preliminary design of the...

New power board is assembled
Log from DIY programmable (SCPI) bench power supply
new power board is assembled and so far no surprises was found. Only correction on the PCB was one capacitor in pre-regulator's tracking circuit. I used one THT and solder it over SMD component.I borrowed one channel from existing PSU for digital control....

Testing "low ripple" mode of operation
Log from DIY programmable (SCPI) bench power supply
Since the Low ripple functionality is now also implemented on the firmware side we can test it on the real equipment. When "Low ripple" mode of operation is selected the power pre-regulator is bypassed by setting so-called Duty cycle of the SMPS controller...

Hot summer day update...
Log from DIY programmable (SCPI) bench power supply
Many things happened since my latest post so I'll try to cover it chronologically.1. Playing with bias power supplyFrom the beginning I was entertained with the idea to employ only one power input for power and bias. That simplify selection of main transformer...

Improving the Power module cooling
Log from DIY programmable (SCPI) bench power supply
My initial intention was to additionally lower temperature of power pre-regulator by adding "thermal bridge" between bottom PCB side and post-regulator heatsink (for Q4 power mosfet). That will affect cooling fan operation since it could work with lower...

Network switch with 5-12V input and a 5V/2A USB out
Log from Tool hacks
Sometimes I need to set up a little network infrastructure to connect a multitude of devices to a network. I also can't be picky about PSUs, as I can get either a barrel jack one or a simple USB socket from my computer. Also, I need something to power...

Making circuits
Log from Powerful Portable Speaker
Charging circuitMeanwhile I've managed to fully assembled the charging circuit I described in the previous log. I backpacked it on top of the four LiPo cells.I also added an external board with four common anode RGB LEDs to display the status of each...

Speed Controller Hax - Place your FETs!
Log from The Razor E300 Overvolt!
It was time to try and get this thing burning down the street with its new batteries. We got to burning, at least. We definitely got to burning. Check out the video for the full story. Details below.Okay, so after great success with the lithium trial...

Audio and Power Fix
Log from From Trash to TV
Power Section:I was working on TV this weekend to iron out the remaining issues. The cheap ebay LM2596 DC-DC switching converters arrived and would not work out of the box! Output voltage seemed fixed at 11.2V. I ended up spending quite sometime to debug...

Heater redesign
Log from Dad, let's recycle the bag! Can I recycle the bag?
Sorry It has been a few weeks. I've been struggling with other projects, but I'm getting back to work now. Last test I had a problem with things overheating. First it was the power mosfets and rectifier. I stuck them on a nice heatsink with a fan, and...

Tearing down the base vehicle!
Log from SOLARBOI - A 4G Solar Rover!
In this video, I introduce the TKIRV project and what we're looking to achieve. Then I set about tearing down our base vehicle, a Radio Shack RC car from the early 2000s. It's got 4WD, front and rear suspension, and is pretty much the perfect size for...

TKIRV - Steering and Drive
Log from SOLARBOI - A 4G Solar Rover!
I enlisted the help of my friendly local Alex (TM) and we got to work tracing the PCB and figuring out how the car controls steering and drive. Initially we had a lot of luck and I quickly found a way to control steering and drive; these early gains...

v1.0 shake down
Log from I2C TEC controller
Finally received the last op-amp from mouser, which has allowed me to run tests on the board. After a number of air-wires to sort silly mistakes the board is working as expected. I will post the TINA model of the op-amp circuit that is useful for checking...

Test with real power supply but no pico logger yet.
Log from Desktop Cooler
I grabbed my bench supply some ice and water and hooked the Peltier device up again. This time I took more thermal images (still downloading the Fluke app) As promised this device pulls 5 amp @ 12 volts (~60 watts). As the temperature differential gets...

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