How to Play with SIM800L — Part 2/2

Because the SIM800L module is very flexible, a great GSM project design can be relatively […]

TEA1039 Datasheet

P. Marian - 06/23/2008

The TEA1039 is a bipolar integrated circuit intended for the control of a switched-mode power supply. Together with [...]

Sony Ericsson T630 T628 Service Guide Manual

P. Marian -

Here you can download the service guide manual for Sony Ericsson T628 and T630 mobile phone which include: [...]

LG 600 Service Guide Manual

P. Marian -

Here are the LG600 service guide gsm files: service manual, assembly, data kit and test method, pcb, schematic [...]
dc motor speed controller schematic

DC Motor Speed Controller Circuit

P. Marian - 06/19/2008

This motor speed controller uses a single IC LM1014 to control the speed of a DC motor. It [...]

Simple Cable TV Amplifier Circuit

P. Marian - 06/18/2008

This cable tv amplifier circuit is a rf amplifier designed to be quickly installed between two coaxial cables. Both input and output impedances are compatible with 75 Ω cables. The main amplifier si T1 transistor, [...]
speech processor circuit schematic

Speech Processor Circuit

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To obtain the best modulation result of a transmitter you can use 2 ways: clipping and dynamic compression. [...]
basic infrared transmitter circuit schematic

Basic Infrared Transmitter Circuit

Received by Email - 06/15/2008

This infrared tranmitter is intended for use with this infrared receiver. It works with 2 - 1.5V batteries [...]

Mobile Phone Sniffer – GSM Telephone Detector

P. Marian - 06/06/2008

This handy, pocket-size mobile transmission detector or sniffer can sense the presence of an activated mobile cellphone from [...]
preamplifier scanner circuit schematic

Audio Preamplifier Scanner Circuit

Received by Email - 06/05/2008

This circuit scan all the preamplifier entries to identify where is a audio signal and that entry remains [...]
short wave receiver preselector circuit schematic

SW Receiver Preselector Circuit

Received by Email - 05/29/2008

This is a Preselector for SW receivers (diy hf preselector) circuit. The entry low capacitance of MOSFET modern, with two gates, will create negative inverse reaction through a uncoupled source resistor. Applied right this technique [...]

Audio Amplifiers from Class A, B, D to T

P. Marian - 05/22/2008

The final amplifier is the power source of every audio installation. Its job is to convert a small [...]

VOX Circuit

Received by Email - 05/21/2008

VOX is a switch ordered by voice, often used at microphones instead of the classic switch button. The [...]