Table of Contents
Circuit dual power supply with voltage regulator 7812, 7912 for preamplifier, can have another voltage with Cis 7805 and 7905 or 7815 and 7915. A simple linear power supply, composed of 78xx and 79xx, can provide power for applications such as preamplifier stages, headphone amplifiers, and other devices that require positive and negative voltages.
Schematic Circuit dual power supply with voltage regulator 7812 7912
There are many manufacturers of these integrated circuits, so you can find KA7812, MC7812, LM7812, L7812, CW7812, LR7812, AT7812, NCP7812, PJ7812, NCV7812, HX7812, KIA7812, SK7812, 7812, AS7812, WD7812, SC7812, NJM7812, LR7812, SCD7812, HT7812, TCM7812, BA7812, UA7812, ICW7812, UPC7812, UA7812. The prefix depends on the manufacturer, so each one uses their own. You can use any suffix in this assembly or in any maintenance you do. The only difference is that parts from a certain manufacturer may be more reliable than those from another.
List of chips with negative voltage: KA7912, MC7912, LM7912, L7912, CW7912, LR7912, AT7912, NCP7912, PJ7912, NCV7912, HX7912, KIA7912, SK7912, 7912, AS7912, WD7912, SC7912, NJM7912, LR7912, SCD7912, HT7912, TCM7912, BA7912, UA7912, ICW7912, UPC7912, UA7912.
The suffix is important, as it can indicate the type of operation suitable for the chip, as well as the maximum current supported. Some voltage regulators, even in the TO-220 package, can support currents of 500mA, 1A, 1.2A, and 1.5A. So you should pay attention to which one is suitable for your application.
Bom Circuit dual power supply with voltage regulator 7812 7912
|VPOS||LED1||LED 3 mm||1|
|VNEG||LED2||LED 3 mm||1|
|LM7812||U1||TO-220-3 — Positive linear voltage regulator||1|
|LM7912||U2||TO-220-3 — Negative linear voltage regulator||1|
|HEATSINK-TH_L15.5-W10.5-XSD1226-005||HS1,HS2||15×5×10.5×24 mm heat sink||2|
|DB301V-5.0-3P||CN1,CN2||Kre 3 pin Borne Connector (KF301, KR301) 5.08 mm,||2|
Download files and notes
Download files for PCB in Gerber, PNG, SVG, and PDF
- Datasheet PDF IC UA7812 — Texas Instruments
- Datasheet PDF IC L7812 — ST Microelectronics
- Datasheet PDF IC Lm7812 — Fairchild Semi
- Datasheet PDF IC NCV7812 — On Semi
- Datasheet PDF IC LM7912 — Texas Instruments
- Datasheet PDF IC L7912 — ST Microelectronics
- Datasheet PDF IC — Fairchild Semi
- Datasheet PDF IC — On Semi
- Technical Review of Low Dropout Voltage Regulator Operation and Performance
License: Public Domain
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