Electronic circuits cannot function without a proper power supply and a good power supply ensures stable and reliable circuit performance. Power supply is one of the most important sections in any electronic system and many electronic circuits need both positive and negative voltage, for example, operational amplifier circuits, audio circuits and analog circuits need dual […]
±15V Dual Power Supply Circuit using 7815 and 7915 ICs
Like our previous post on dual power supply, here we learn more about a 15V dual power supply circuit for a preamplifier; many electronic circuits need dual voltage supply, for example: operational amplifier circuits, audio circuits and other analog circuits. These circuits need both positive and negative voltage that is +15V and −15V; so, this […]
Pre Amplifier Power Supply Circuit using IC 7818 Voltage Regulator
In many audio circuits, clean power supply is very important, especially pre-amplifier circuits need stable and noise free voltage and if supply voltage is not stable then hum and distortion may appear in audio output. Therefore, a regulated power supply used in this post, as this circuit uses transformer, bridge rectifier, filter capacitors and 7818 […]
Dual ±18V Regulated Power Supply Circuit
Power supply is important part of electronic circuits and many analog circuits need positive and negative voltage, for example audio amplifier, operational amplifier circuit and signal processing circuit. This Dual ±18V Regulated Power Supply Circuit produces +18V and -18V DC output from AC mains, which uses transformer, rectifier diodes, filter capacitors and voltage regulator ICs. […]
Transformerless LED Display Circuit using Capacitor Dropper
Many small electronic devices use LED displays, although a transformer based power supply is common, it increases the size and cost of the circuit and therefore, a capacitor power supply provides a small, low-cost, and easy to build alternative to a transformer based power supply. This circuit uses a capacitor dropper power supply to convert […]
9V DC Transformerless Power Supply Circuit
Many electronic circuits require a power supply and operate on low DC voltages such as 5V, 9V, or 12V., a transformer normally steps down the high AC voltage; however, it increases the cost and size of the power supply. Therefore, many small circuits use transformerless power supply and this type of supply directly converts high […]