Name: DIY Kit LM2596 Adjustable Voltage Stabilizer
Price: 200
Availability: OutOfStock

DIY Kit LM2596 Adjustable Voltage Stabilizer

⚡ Adjustable Output Voltage – Converts unstable AC input to stable DC output from 1.23V to 35V, up to 3A current.
🔁 High Efficiency – Built-in 150 kHz oscillator and 1.23 V reference ensure low heat and excellent power conversion.
🔧 Smart Circuit Design – Includes rectifier, filter capacitors, Schottky diode, and indicator LED for reliable performance.
🔋 Wide Input Range – Accepts 3.2V to 40V input; ideal for DIY power supplies using idle transformers.
🔐 Built-in Protections – Features current limiting, thermal shutdown, and voltage regulation for safe operation.
📐 Voltage Formula – Output voltage calculated as Vo = 1.23 × (1 + W1/R1) for precise tuning.

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1. Function:

It can input non-stable alternating current and output adjustable voltage. Its minimum output voltage is 1.23V and the maximum output current is 3A. LM2596 contains fixed frequency oscillator (150KHz) and benchmark voltage stabilizer (1.23 V), and has perfect protection circuit, current limit, heat cut-off circuit and so on. This circuit has the advantages of high efficiency and low heat. It can make full use of the various idle transformers around you to make the stable voltage stable power supply.

2. Working voltage:

LM2596 is the switch of voltage stabilizer and step down circuit. Please ensure that the input voltage is higher than the output voltage. The general input is 3.2V – 40V, and output is 1.23V-35V.

3. Circuit principle：

The non-stationary AC voltage input of J1 was rectified by d1-d4, C1 and C2 filtered as the input voltage of LM2596 output the stable DC voltage from J2 through the LM2596. C3, C4 is the output filter capacitance. R2 and LED2 constitute the indicator circuit. LED1 is 8mm white LED. Its brightness can roughly indicate the output voltage. If the brightness is too bright, you can increase the resistance of R2 properly. L1 is a special inductance, which acts as an energy conversion. D5 is the Schottky diode, which plays a continuous role in the circuit. C5 interferes the circuit. The output voltage of R1 and W1 can be calculated by the following formula: Vo=1.23(1+W1/R1)

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