How to make low budget 12V battery charger - RS 1000

How to make a battery charger from a UPS transformer
ChatGPT
Making a battery charger from a UPS (Uninterruptible Power Supply) transformer can be a practical and cost-effective solution, especially if you have an old UPS unit lying around. Here’s a step-by-step guide to repurpose the transformer from a UPS into a battery charger:
Materials Needed:
UPS Transformer: Salvaged from an old UPS unit. This transformer typically steps down the AC mains voltage to a lower AC voltage suitable for charging batteries.
Bridge Rectifier: Converts AC voltage from the transformer to DC voltage. You can use a bridge rectifier module or assemble one using four diodes (e.g., 1N4007).
Filter Capacitor: Electrolytic capacitor (e.g., 1000 µF, 25V or higher) to smooth the rectified DC voltage.
Current Limiting Resistor: For charging indicator LEDs (optional).
Heat Sink (if necessary): For the rectifier diodes if they are expected to handle significant current.
Enclosure: To house and protect the circuit.
Miscellaneous: Wires, soldering iron, solder, connectors, multimeter, and basic tools.
Circuit Design and Assembly:
Identify Transformer Leads:
Locate the primary (input) and secondary (output) leads of the UPS transformer.
The secondary winding should provide a suitable AC voltage for charging your battery. Common secondary voltages are 12V, 24V, or 48V AC.
Bridge Rectifier Connection:
Connect the secondary winding leads of the transformer to the input of the bridge rectifier.
Ensure correct orientation of the diodes in the bridge rectifier: AC input leads to the AC terminals, DC output terminals to the filter capacitor.
Filter Capacitor:
Connect the output of the bridge rectifier to the input of the filter capacitor.
The capacitor helps smooth out the rectified DC voltage, reducing ripple.
Output Voltage Check:
After connecting the filter capacitor, measure the DC voltage across its terminals using a multimeter.
Ensure the voltage matches expectations (e.g., around 16V DC for a 12V battery charger, allowing for voltage drop under load).
Indicator LEDs (Optional):
Connect LEDs with appropriate current-limiting resistors across the output terminals to indicate power on and charging status.
Testing and Safety:
Before connecting a battery, ensure all connections are secure and insulated to prevent short circuits.
Consider adding a fuse or circuit breaker on the input side for additional safety.
Final Checks:
Double-check connections and insulation.
Verify the charger's output voltage and current capacity with a load (such as a resistor) before connecting a battery.
Notes:
Transformer Ratings: The transformer's current rating should match or exceed the charging current required by your battery. For example, if charging a 12V battery, the transformer should provide sufficient current at 12V AC to charge it effectively.
Battery Compatibility: Ensure the charger is suitable for the type of battery you intend to charge (e.g., lead-acid, gel-cell). Different battery chemistries require specific charging profiles for optimal performance and safety.
Safety Precautions: Always work with the circuit disconnected from mains power. Double-check connections and insulation to avoid short circuits. Use appropriate fuses or circuit protection devices.
By following these steps, you can effectively repurpose a UPS transformer into a battery charger, providing a low-cost solution for charging your batteries. If you have any doubts about the transformer's specifications or its suitability for your battery type, consult the transformer's datasheet or seek advice from someone experienced in electronics.

[@dineshherath723]

Supiri

[@Jselectronics734]

Thank you ayya❤

[@user-ee4mv3kw8v]

Led බට කණු හදන්න විඩියෝ එකක් කරන්න ❤

[@bgcharuka1400]

Sine wave inverter එකක් හදන විදිය කියලා දෙන්නකො

[@uranga-ob4jf]

Niymy

[@HareendraKumara]

capacitor ekak danna ona nadda. ?
awashya nam agaya kumakda .?

[@SDKDH665]

Dj light ekak hadana hati dannako

[@Kukul_chaminda44]

තම්මේල් එක බලාගෙන දාහේ කොලයකට වයර් හතරක් අමුනලා එක පැත්තක් AC220 දීලා අනික් පැත්ත බැටරියට දීපු මම 😪. (අපි පොතට කලින් හැමදාමත් පිට කවරෙම බැලුවේ)

[@gadgetwedda]

😁😁😁😍😍

[@niroshanajith6512]

12v bick battry charg karanna 14v vadi nadda

[@gadgetwedda]

Battery යෙ ගහලා ඇති උපරිම voltage එක කියද කියලා මල්ටි මිටරයක් තියෙනවනම් බලන්නකො බයික් එකෙන් voltage කියක් out වෙනවද කියලා

[@HirushanHasaranga]

මේකෙන් අම්පියර් කීයක් ගන්න පුළුවන්ද

[@athulanissanka2202]

Ayiye ups transformer valin inveter hadanna barida

[@gadgetwedda]

Puluwan