Welcome to a new InTheMail, the series that will make your account balance go negative or so I’ve been told by my viewers. I admit it myself, when I watch these kind of episodes from other youtubers and i see something interesting, there is no going back, I have to order that stuff.
Today I’m going to be building a complete DIY analog bench power supply. The actual analog power supply kit (0-30V 0-3A) that I’m going to be using, is this one, it was shown and assembled in voltlog #8. Besides that I’m going to be using this plastic enclosure which I think is quite nice and perfect for such a project, this one can also be found on banggood and there will be links in the description for all the items used in this build.
Everybody knows this is a great scope for the money but as usual test equipment doesn’t use the best solutions in terms of cooling fans and associated hardware. They care mostly about keeping the unit cool and not about the noise the unit makes because usually these are used in environments where multiple equipment is run at the same time, the noise level is already high so it doesn’t matter much if a small 50mm fan is adding noise.
But it’s a totally different story for us hobbyists that are using these pieces of test equipment indoor, in our homes. We usually want units with passive cooling or with silent fans.
This episode will be taking a look at different dummy load models, these are all purchased either from ebay or from banggood so they’re easy to get and inexpensive. I just wanted to show them together and make a bit of a comparison just to help you understand the differences between these models so that you can choose the model that will fit your needs best. I have 5 dummy loads in total, starting from $5 a piece up to $20 a piece.
There might be slight variations of these available for purchase , some might come configured for different maximum power dissipation, some might have enclosure but those are all details that you can figure out on your own. Today I’m just going to point out the major differences and features of each one.
Welcome to a new InTheMail video where I show you everything I purchase electronics related.
A list of items appearing in this video:
- 0:10 Hakko A1321 ceramic heating element
- 4:30 Soldering iron soft metallic cleaning sponge
- 5:25 Alcohol plastic container 200ml
- 6:00 Antistatic ESD working gloves
- 7:21 Star shaped led aluminium pcb base
- 8:00 Cree XTE White LED
- 9:33 Pentalobe 0.8mm screwdriver
- 10:25 Excellway CH2 Quick Wire Connector
- 11:30 M3 x 25mm black countersunk hex screw
- 12:27 High voltage 3V to 7KV boost module
- 14:32 1W 350mA led driver with pwm control
- 16:38 DHT11 humidity and temperature sensor
- 17:23 Bi-directional 4 line level converter module
In this video I will be announcing the winners for the EasyEDA contest where five $50 coupons will be given away. The draw took place Saturday 13th August around 9 AM.
The guys from EasyEDA contacted me and asked if I could do this review I accepted and they’re also going to be offering some free coupon codes for my viewers which you can use to order PCBs but more on that towards the end of this video.
EasyEDA being a cloud app it’s supported on every platform / operating system. You get schematic capture, circuit simulation and pcb layout functionalities. You can import files or projects created with other design tools like Eagle, Kicad or Altium and i’m sure it does most of the things that every pcb design tools does.
You can share and collaborate with other people on your projects so that’s a big selling point for EasyEDA and they made sure to put that on their front page. And I’m sure a bunch of other features that are not mentioned on their homepage and best of all you always get to work with the latest version because the app is on the server not on your computer. Another good thing is that you have the whole process from design to finished PCB on one single app or service and you just click through until you get the PCBs at your door and that might be a big advantage for some people.
Now, ofcourse a big concern with these kind of web based apps is what happens if they decide to shutdown the service? Well the guys from EasyEDA say that if they ever decide to shutdown the service they will open source the code and allow people to download all their projects so in theory you are covered, you could host your own server if that ever happens.
For more info, you should watch the video below.
Another InTheMail video because I know you like seeing these electronics items from China.
I haven’t done any teardown for a while so today we’re going to take a look inside the Broadlink BlackBean, model RM Mini 3.