Circuits of audio pre-Amp mic

A microphone preamp is a preamplifier used to amplify

Battery indicator

In this part of the investigation in a circuit of battery

Rankaian Charge HP Menggunakan battery AA (3 volt)

Rankaia Charge hp Menggunakan battery AA (3 volt)
With this tiny thing you can almost charge all the devices which are charged via the USB, like iPod or cellphones, with only two Aa-Cells!

Rangkaian Charging battery Mobil

This is a simple circuit that can be used for charging (mengisi) car battery. In this circuit there is facility for monitoring the charging current and voltage.

Rangkaian Monitor status battery 12 volt

This circuit can be used for monitoring the voltage level of an automobile battery. When battery voltage is 11.5V or less transistor Q1 will be On

Pengisi Battery Li-On Menggunakan USB

USB port it is one of the most useful port. Besides being used as an interface port for the device I / O computer, this port was also used

Rangkaian Charge Monitor for 12V battery

This circuit project is a function for monitoring the charge level of 12 volt batteries continuously. The circuit possesses two vital features:

1. reduces the requirement of human attention by about 85%.
2. highly accurate and sophisticated methods.

A battery is a vital element of any battery-backed system. In many cases the battery is more expensive than the systems it is backing up.

Mobile Phone Battery Charger Circuit

This Mobile phone chargers circuit presented here comes as a low-cost alternative to charge mobile telephones/battery packs.

LTC4060 - NiMH/NiCd Battery Charger Circuit

Skema Rangkaian NiMH/NiCd Battery Charger

Linear Technology Corporation introduces the LTC4060, an autonomous 1- to 4-cell, 0.4A to 2A linear NiMH and NiCd battery charger.

Rangkaian Charger Accu 6 Volt

Here is the circuit diagram of a low cost charger for 6 volt batteries. This circuit requires a regulated 10V-DC front end capable of supplying 2 Amps.