This module is not specific to the Arduino family, it can be used for any electronic system requiring a regulated power supply that is very precise, stable and completely free of interference.
It is therefore a DC-DC converter of the "Step-Down" type, ie a voltage step-down.
It is composed of an integrated circuit LM2596S which is the heart of the system, a potentiometer for adjusting the output voltage and filter capacitors.
The module is in fact a switching power supply operating at the frequency ( measured at no load ... ) of 26.631KHz with an input voltage of + 15V.
I performed a second measurement under the following conditions:
- Input voltage range up to +40 V
- Input current limitation: 1A
- Load: Platinum " Ready for PIC"equipped as follows:
- 1 x PIC18F4620 processor
- 1 x DS1307 RTC clock with AT24C32 EEPROM memory
- 1 x 4x20 character I2C LCD display
- 1 x MCP23017 I2C Port Expander
- 1 x FT232RL USB TTL Serial module
- Regulated output voltage: + 5.0V( there is barely 160mV of residual wave ... very good )
- Current actually drawn by the stabilized laboratory power supply: 66.9mA
- Switching frequency: 53.476Kz
It goes without saying that with this type of converter it is obviously possible to supply a 3.3V assembly such as the BlueTooth HC06 module for example. described briefly in one of my other articles, or any other system requiring a specific power supply.
→ I bought this module here in September 2014 for € 1.79 ( free shipping ).