Tag Archives: regulator


Revised dual power supply boards are back in stock

Posted on by Leave a comment

We have added a 500mA PTC fuse to our dual (5.0V/3.3V) power supply regular board in the new version. This power supply regulator board provides constant 3.3V and 5.0V outputs from an unregulated DC input (6.5-10V). The DC outputs are accessible through a 3-pin terminal block. It is small in size (1.9″X1.0″) and can be easily enclosed inside a project box along with the project circuit board.

New version has PTC fuse

New version has PTC fuse

The board doesn’t have any ON/OFF switch, because it may not be useful if this board is enclosed inside the project box. We have included two through-hole pads on the board if you want to add an ON/OFF switch externally. There are two surface mount pads which are shorted by default with solder to close the circuit permanently. They must be de-soldered if an external ON/OFF switch has to be added.

Buy Dual Power Supply Board for only $6.99

Multi-purpose dual power supply (5.0V and 3.3V) regulator board

Posted on by 19 comments

All embedded systems require electric power to operate. Most of the electronic components inside them, including the processors, can operate at a wide range of supply voltage. For example, the operating voltage range for the PIC16F1847 microcontroller is 2 to 5.5 V. But there are certain applications where you need a regulated constant voltage to avoid malfunctioning of the circuit or getting erroneous results. For instance, any application that involves analog-to-digital conversion (ADC) requires a fixed reference voltage to provide accurate digital count for input analog signal. If the reference voltage is not stable, the ADC output is meaningless. Here is my latest dual power supply regulator board that provides constant 3.3V and 5.0V outputs from an unregulated DC input (6.5-10V). It is small in size and can be easily enclosed inside the project box along with a project circuit board. It can also be used to power test circuits on breadboard. The board uses two AMS1117 series fixed voltage regulators and receives input power through a DC wall wart or an external 9V battery.

Dual power supply regulator board

Read more