Oiyagai 5pcs MB102 Breadboard Power Supply Module for Arduino, 3.3V/5V DC USB Regulated Power, 700mA Output for Solderless Prototype Projects

First of all, it works. Comparing with a similar product (also 5 per package), this one has separate package on every power supply. The distance of the two set of pins, which are used to plug in the standard breadboard is close to specification and can be plugged in without too much effort. Based on my experience, new learner is very easy to make mistake. One short circuit instance will break it. The consequence is that the output voltage will be much higher than 5V. With 5 per package, it will last for a while.

The simplicity of the device for teaching modern electronics is unbelievable. Easy instructions and get interactive device.

These are a good price, decent quality, and so far, no failures.

The power interfaces are well built. You have two ways to supply power to the board, USB and DC-in plug. has power on switch.very happy with this product.

I love the idea of these boards and what really stops you buying them when they are this cheap? Well one consideration might be build quality. I received my boards yesterday and plugged one in powered by a 12v DC supply. I checked the voltage output and they read 5.1v and 3.3v. After about a minute (with no load) I could smell something burning and quickly unplugged the power. I checked the board and managed to burn my finger on one of the two AMS1117 voltage regulator chips. A close inspection of the board showed at least 4 badly or partial solder joints and I suspect either a solder bridge or joint issue might have caused that dangerous overheat. I'm no expert but I am worried about plugging this in again now. I guess I'll check the other boards and proceed carefully.

I checked the output of both 3.3 and 5v and the 5v rail was 10.3v. Changed the jumper on other side and it also measured 10.3v. Be careful and measure the voltage before using them. Tested the 2nd board and the power switch is not functional. Third board has 3.2v and 5.1v output.

BE WARNED BEFORE YOU BUY THIS! PLEASE READ! I just got these in and realized that the USB port on the PCB (pc board) is the wrong type! it is a USB Type A female and it should be a Type B Female like what is on the Arduino boards themselves! I checked the wiring using a meter and it is in fact wired to the 5V pins on the USB port, there is no data connections. SO in short if you were planning on using a USB cord and a power bank to power this as you build your projects you CAN NOT, unless you make a custom cord with a USB Type A male on each end! For the price I'm not going to return it and just power it thru the barrel plug connector on this board, at least they got that part right!

These modules are a bargain and, at the price, can be used for many projects

I use these small power modules on 400 and larger pin solderless breadboards. These were five pieces for ten bucks, and delivered within 3 days. I had several different boards set up, so I needed a couple of extra power modules. These are working fine, so far - voltages are correct and they seem reasonably well made. I would buy again if i needed more modules, but with a package of five, I probably have enough to last for a while. No complaints.

The boards do what the ad says, to make this a killer putting in a usb to uart would be unbelievable!

tres satisfait

a nice small power supply for stand alone projects and a great price.thanks

Work as advertised