Friday, December 12, 2014
Stereo Audio Power Amplifier 20 Watt
Here is a reliably high sound quality audio power amplifier project based on the National Semiconductor’s LM1875 IC.The circuit that we give is a similar form of the application circuit in the datasheet that NS provides. It is really easy to build and low cost.
Servo Amplifier current negative feedback
In the field of consumer reports electronics products reviews, product size, weight is toward smaller, lighter direction, high-power single-chip audio power amplifier needs of increasingly prominent, TDA7294 is currently the best performance, the biggest single-chip audio power amplifier One.
Audio power amplifier circuit 140 W
This simple schematic shows a 140W Audio power amplifier circuit by using 2N3569, 2N3055, MPS6533, 2N4355
Car Battery Charger
This circuit shows car battery charger that will easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA.At this time, a lower voltage is applied to finish off and keep from over charging. When the battery is fully charged, the circuit switches off and lights a LED, telling you that the cycle has finished.
Thursday, December 11, 2014
Ultrasonic
- Ultrasonic Transmitter - This is the schematics for an Ultrasonic Transmitter which will send a signal out into its surrounding area.
- Ultrasonic Receiver - The photo depicts the schematics for an Ultrasonic Receiver which will detect the signal from the Ultrasonic Transmitter once it bounces off from an object.
- A Cheap Ultrasonic Range Finder - Here we use an ultrasonic piezzo transmitter with its receiver, they are very efficient, easy to find and quite cheap.
- Ultrasonic Range & Imager - This is the electronic schematic of the homebuilt Sonar.
Lithium Poly Charger
The above circuit will charge any 2-cell * Li-Ion battery pack.Maximum current is about 650 milliamps.The circuit is designed for batteries of 900mah or higher. Note this circuit is NOT for Li-Metal batts (i.e. Duralites).
Power source can be a 12v Gell cell (Power panel), or can be powered by a car’s cigarette lighter. I use an old 12v DC wall transformer (800ma or more.) Radio shack sells a 12v/1amp wall DC adapter #273-1776 that will work. Supply does not need to be regulated. In fact my cheap supply outputs 17 volts with no load.
Source: http://www.shdesigns.org
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