So this time I decided to make pretty simple but powerful enough audio amplifier. For this I’ve chosen quad bridge car audio amplifier TDA7384 which has four input and four output channels with power capability 4×35W(4Ω).

 
If connect to car battery where operating voltage is about 13.2V, then each channel can give 22W(4Ω) – what is [...]

Firmware for AduC70xx ARM microcontrollers can be uploaded using built in boot-loader. To work with boot-loader Analog Devices offer to use small free program ARMWSD working under windows system. Program doesn’t require installation. ARMWSD communicates with AduC70xx via COM-port. Simple programming steps looks like this:

Connect target board to PC COM port;

Go to Configure->Parts and select [...]

Hall sensors are common sensors of many types measuring devices including linear or angular motion, magnetic field, current, etc. main convenience of hall sensors is that they don’t have to be mechanically connected to object. Also they are simple, cheap that makes them attractive in many industries like automotive, manufacturing, aviation. There are manu manufacturers [...]

In specifications of operational amplifiers there are maximum limits of allowed voltages on pins. Maximum currents are limited as well. So voltage and current they both limit allowed dissipated power Pmax=Umax*Imax.
In well designed circuits Op Amps should have protection circuits from various overloads like short circuit, high common phase voltage level in differential inputs, electrostatic [...]

All regular voltage regulators (like 7805) have several disadvantages like output voltage is always lower than input and some power is dissipated in control element. Dissipated power is approximately equal to I(Vin-Vout).
There is another way to generate regulated voltage. Method is different from previous. In switching regulator a transistor operates as a saturated switch which [...]

Most of op-amp circuits run from symmetrical bipolar supply source lets say ±15V. The simplest way to generate symmetrical split supplies is to use a pair of 3 terminal voltage regulators. For instance lets take two voltage regulators: 7815 and 7915.

 
If you need an adjustable variant of dual polarity regulated voltage source you can [...]