Power Supply



3 volt car adapter by LT1074

This 3 volts Car Adapter circuit is based on a standard LT1074CT switching regulator IC. The schematic shows the LT1074CT used as a positive step-down or ‘buck’ converter. The ‘switcher’ is used to convert a +12-volt car battery voltage down to +3 volts for use with the personal hi-fi’s and handheld games for the author’s […]



2009 Nissan Sentra Wiring Diagram Power Supply and Ground

The Nissan Sentra is a compact car made by automaker Nissan Motors and is generally a rebadged export version of the Japanese Nissan Sunny. The following article discuss the 2009 Nissan Sentra wiring diagram, power supply, ground distribution and circuit elements which also cover power supply routing circuit, fuse, fusible link, circuit breaker, intelligent power […]


Nissan X-trail Wiring Diagram and Electrical System Schematics (2006)

The Nissan X-Trail is a compact crossover SUV produced by the Japanese automaker Nissan since 2001. The first-generation X-Trail uses the Nissan FF-S platform, shared with the Nissan Almera and the Nissan Primera. The following wiring diagram and electrical system schematics provide detail explanation about the 2006 Nissan X-trail electrical system which covers discussion on […]


Balanced Microphone Preamplifier

The preamplifier is intended for use with dynamic (moving coil–MC) microphones with an impedance up to 200 Ω and balanced terminals. It is a fairly simple design, which may also be considered as a single stage instrument amplifier based on a Type NE5534 op amp. To achieve maximum common-mode rejection (CMR) with a balanced signal, […]


Supply Voltage Monitor

A circuit for monitoring supply voltages of ±5 V and ±12 V is readily constructed as shown in the diagram. It is appreciably simpler than the usual monitors that use comparators, and AND gates. The circuit is not intended to indicate the level of the inputs. In normal operation, transistors T1 and T3 must be […]


Supply Voltage Monitor

A circuit for monitoring supply voltages of ±5 V and ±12 V is readily constructed as shown in the diagram. It is appreciably simpler than the usual monitors that use comparators, and AND gates. The circuit is not intended to indicate the level of the inputs. In normal operation, transistors T1 and T3 must be […]


Low Power 12V Transformerless Power Supply

Many circuits can be powered directly from the mains with the aid of a series capacitor (C1). The disadvantage of this approach is that usually only one half cycle of the mains wave-form can be used to produce a DC voltage. An obvious solution is to use a bridge rectifier to perform full-wave rectification, which […]


Dual Supply From Single Battery Source

Dual-voltage power supply is required especially for powering the op-amps and some of the instrumentation amplifiers. A few low-power audio pre-amplifiers also use dual-voltage supply. This circuit provides both +9V as well as -9V supply from a single 9V battery. It consists of timer IC NE555 (IC1), negative-voltage regulator IC 7909 (IC2) and a few […]