Breadboard Power Supply Module MB102 MB-102 3.3V/5V

100% Brand New And High Quality

For MB102 bread board

compatible with 5V, 3.3V

Input Voltage :6.5-12V (DC) or USB power

Output voltage: 3.3V, 5V switchable

Maximum Output Current: <700ma

Two way independent control

Can be switched to 0V, 3.3V, 5V

On-board Two sets of 3.3V, 5V DC output pins, Facilitate the external leads

Barrel Socket Power Input

There is a green LED to indicate the presence of power, and an ON / OFF latching switch to control the power to the board. On this particular model and version, the centre pin of the barrel socket is positive; however, please double check with the manufacturer’s instructions, in case they have made any changes. You have to push the switch IN to use this device.

The operating instructions state that the input voltage through the barrel socket must be between 6.5 V and 12 V. Hence, if you wish to use it to its maximum capability you will need to remain in that range. This is a non-adjustable fixed power supply model, which is good enough for most applications. The manual states maximum output current to be 700 mA. However, it is probably better to use much lower voltages and current to be on the safe side in case you make a mistake on your breadboard circuit.

Jumper Pins and Headers

Jumper pins are utilised for selecting the voltage levels on each side of the breadboard power rails. You can choose between 5 V, OFF, and 3.3 V. There are two sets of jumper selectors for each side of the breadboard power rails; hence, you can have any combination of voltages on either rail. There are also header pins for tapping off voltages, using a cable or jumper wires.

Voltage Regulator AMS1117 Spec

The AMS1117 is a voltage regulator manufactured by Advanced Monolithic Systems. There are two regulators where one regulator establishes a 3.3 V rail, whilst another establishes the 5 V rail. These are a good make of components found in a SOT-223 package. Their documentation states that this series can provide a maximum output current of 1 A, and the absolute maximum input voltage rating is 15 V.

The documentation indicates that these regulators have built-in protection against short-circuit through power limiting circuitry. There is also thermal overload protection circuitry, which will shut-down the regulator should its junction temperature reach 165 °C.

These regulators also have internal diode protection and can handle transient surge currents from 50 A to 100 A.

This is a high efficiency low dropout regulator, which can operate down to 1 V. It has a 1 V input-to-output differential and therefore useful for battery powered applications. Line regulation is 1.2 % and maximum load regulation 0.4 %.

The AMS1117 series is an excellent choice for creating adjustable power supplies as well. The package provides a 1.25 V reference voltage from the adjust pin, and with a pair of resistors in a voltage divider network the regulated output can be adjusted. The documentation is also very clear and comprehensive in its use.

PCB

The PCB manufacturing is of good standard, and the markings indicate the model MB V2, known as MB102. This is obviously a double-sided board that is machine assembled to a good quality standard. There are two sets of mounting header pins, and the ones on the front are if you want to use the holes on the outermost edge of the breadboard thereby using a least number of tie points.