This is a highly efficient voltage converter power supply. Provides you with the precise voltage that you need for your project and testing purpose.
Providing you with your desired output voltage power from any DC voltage source for exmple, battery, power supply, power bank.
Small and light weight. Suitable for portable on-site or indoor desktop use.
Adjustable output voltage from 0Vdc to 50Vdc (up to 5A, 250W)
Can set current limit output.
Precision output settings.
DC barrel socket or pluggable terminal connection for input/output source.
Accept input from 6Vdc to 55Vdc.
Multiple display mode for voltage, current, power, energy and real time graphical graph.
Step down, step up Converter
This voltage converter allows a wide range of input voltage power supply from 6Vdc to 55Vdc.
You can adjust the output voltage with the user turn-knob. This voltage converter power supply will step-down or step-up to your desired output.
Power Supply Input/Output
Accept wide input voltage from 6Vdc to 55Vdc.
Adjustable output voltage 0Vdc to 50Vdc, and current limit up to 5A.
High power supply with total power output up to 250W.
It is easy to connect to this converter.
You can power up this unit (Vin) through a DC barrel jack connector (OD 5.5, ID 2.1mm), or bare wire through the pluggable screw terminal connector. (the connector on the left side)
You can tap the converted voltage power (Vout) from the same connector type. (the connector on the right side)
Power Display Mode
You can access the display mode by turning the user turn-knob.
Display mode available
Voltage and current display
Power and wattage display
Real time voltage/current graph display
Power up the voltage converter with external DC power supply.
Set the output voltage. Select the button <V>. Press down the knob click to select the number position that you want to change. Turn the knob to adjust the voltage value.
Set the output current limit. Select the button <A>. Similar to step 2, use the knob to adjust the current limit. Setting current limit ensure that the output current will not be more than what you have set.
Press the On/off button (below the turn-knob) to switched on the output supply.
There are many types of rechargeable battery. The common battery selection in Singapore are listed here. Here we will not bore you with the details of how each type of rechargeable battery works. We will only provide enough information to allow you to pick the most suitable battery for your application.
This is a reference page which summarises the common battery sizes available on the market. It helps you choose the most suitable battery and sizes for your design application. Feel free to bookmark this page for your future references.
The battery is considered dangerous goods in the transportation industry. It is important to package it with care. Any short circuit on the battery or dent damage can result in a fire. If you are shipping batteries, it is important to read more regarding the transport rules and regulation.
The following sections introduce some of the common rechargeable battery that can be found in Singapore.
Nickel Cadmium Battery (NiCd)
This NiCd battery used to be one of the most common batteries in the market. Due to the varies disadvantage it has over the newer type of rechargeable, it is slowly disappearing from the market. The capacity is lower and it is known to have the memory effect problem which will reduce its efficiency to store energy over a limited number of the charge cycle.
This battery is often used to power up portable hand-drill and other equipment.
Nickel Metal Hydride Battery (NiMH)
NiMH battery took over NiCd battery over time. NiMH is commonly available in the form of AA, AAA battery in Singapore.
Lithium-ion Battery (Li-ion)
This is the latest rechargeable market on the market. A typical cylinder shape, similar to AA battery. The batteries are now used in a lot of electronic devices (portable drill, laptop battery, etc…).
It comes with many form factor nowadays with popular brands like UltraFire,
ø16 x 34mm
ø18 x 35mm
ø18 x 50mm
ø18.3 x 64.8mm
ø26 x 65mm
ø32 x 65mm
ø10 x 43.5mm
ø14.5 x 50.5mm
CR2450 or LIR2450 (rechargeable coin battery)
ø24 x 5.2mm
CR2032 (rechargeable coin battery)
ø20 x 3.2mm
CR1225 (rechargeable coin battery)
ø12.5 x 2.5mm
Charging IC for Li-ion battery – MAX1555 (2x power input switching) – MCP73831 (SOT-23-5) – MCP73833 (MSOP-10, with temperature monitoring) – MCP73871 (QFN-20)
Lithium Polymer Battery (LiPo)
The most significant advantage of a LiPo is that the battery can be customised into a rectangular block. It is very popular for use in portable electronic devices where there is limited space available. Most of the time it comes in a flat thin rectangular bar. This is unlike the Li-ion battery.
The LiPo battery usually comes with a protective battery circuit. The protective circuit helps to prevent over-charging and over-discharge. It is usually attached to one end of the battery and is secured by the yellow translucent thermal adhesive tape, followed by a pair of red/black wire to attached to your electronic circuit. You can see and feel the circuit at the end of the battery.
The following presents the commonly Single Cell Li-Po sizes and battery capacity.
Lithium Iron Phosphate Batteries (LiFePO4) is known to be a safer battery. It is about 3V for each cell.
Sealed Lead Acid Battery (SLA)
SLA Sealed Lead Acid Battery has been around for a very very long time. It is commonly used in automotive and UPS application. The battery is the most suitable battery if your load requires high initial draw of current. This SLA battery has that capacity to support high surge without damaging itself.
The follow are some of the common SLA battery capacity and sizes
Hitachi HV7-12 VRLA Battery (12V, 7Ah), High Power
Valve Regulated Lead Acid Battery (also known as Sealed Lead Acid Battery), from Hitachi, Japan.
Model no. : HV7-12
Rating 12V, 7Ah
Constant Voltage Charge (20°C)
Standby Use: 13.6 ~ 13.8V
Initial Current: 2.1A (MAX)
Reference guide for charging
SLA Battery (Charging Guide)
A Full Charge SLA battery measure about 12.65V. Charging voltage at 13.4V -> Continuous float charging (recommended chrage voltage if you intend to continuous charge SLA 24 hours per day.) Charging voltage at 13.8V -> Slow charging Charging voltage at 14.7V -> Fast charging
Voltage Level (at rest, room temperature)
Battery Charge Status
100% (Fully Charged)
11.89V or less
Discharged (Not Desirable, will damage battery)
A SLA battery contains 6 cells. Ideally, each cell is about 2.15V. Six cells will form up a maximum voltage of 12.9V.