Welcome to a new InTheMail, the series that will touch both your passion for electronics and your bank account at the same time. Before I get started I’m gonna take a second to remind you to subscribe to the channel and hit the bell notification icon because that’s the only way you will know for sure when I upload new videos. I’m gonna start with an item that’s actually disappointing, this is a mini portable vacuum cleaner but I only realized this after receiving the item, because the seller of this item was advertising this as a dust blower vacuum cleaner, it’s the usual keyword stuffing that aliexpress sellers do.
Tag: Amber Led
Voltlog #217 – Constant Current LED Driver Boards Assembly & Testing
Welcome to a new voltlog, today we’re going to assemble some prototype PCBs for different constant current LED Drivers. I’ve designed and ordered these pcb’s a while ago, the goal is to test different constant current led drivers I have ones that are switch mode and ones that are linear and I wanted to see if I can get away with using the linear ones, because there is a significantly lower part count at the expense of burning energy away and generating more heat.
I haven’t ordered a steel stencil for these pcbs, I’m gonna hand assemble them, I’m gonna use some of this mechanic leaded solder paste which comes in a syringe and then I’m gonna reflow the boards over a hot plate. One hint here about the paste, if the syringe is very old, the paste might get dry which will make it unsuitable for the job and not to mention hard to push out of the syringe so try to keep the paste fresh by storing it in a fridge and replacing it when it starts to dry up or separate inside the syringe.
These two boards will be powered from 12V current through LEDs will be 25 mA and the total string voltage is 10 V calculated with a typical led forward voltage of 2V. That means the difference of voltage will be dissipated on our regulator and that can be calculated 12V-10V we have 2V dropping on the regulator times our current 25mA and is equal to 50 mW.
Voltlog #203 – InTheMail With Cheap Electronic Components
So LCSC seem to be trying to be like the Digikey or Farnell of china and I think they are succeeding. Yes they have many problems regarding their website, which doesn’t exactly make it easy for us to filter and find the required part as we will see in a moment, but it might be worth the trouble because you get access to a whole new set of chips coming from Asia that you wouldn’t normally find and all of this at very affordable prices.
Another advantage is that you can bundle together your PCB order with your Component order and have them delivered in the same package. That’s a pretty neat idea, considering that you find anything you could need in their inventory. You could practically build an entire project with just a single order placed online.
Voltlog #51- InTheMail
Here is a list of the items shown in this video:
- Led 1w amber
- 3W cool/warm white LED
- 6W COB LED
- 16×2 LCD HD44780
- CREE XPE-R3 LED Mini Penlight Flashlight AAA
- Green High Power Burning Laser Pointer
- Green Laser 473nm Protection Glasses
- HT7333 LDO Regulator
- 2xAAA Battery holder
- AAA 1.2V NiMH Rechargeable Battery
- Terminal Block Connectors
- 20 Pcs Gold Plated 4mm Banana Plug
- Silicone Rubber Fan Mounts
- 16mm Rotary Knobs
- Neodymium Countersunk Hole Magnets
- Dental Mirror
- New T-Handle Tap Wrench Capacity M3-M6
You can find links to all these products in the video description.