Electronics Cookbook. Unique collection of free electronics and microcontroller projects with clear step-by-step instructions, detailed drawings, CAD files, source codes and videos. Electronics tips and tricks.

Microcontroller projects.

GPS GSM Tracker. Tracker utilizes the GPS satellites to determine precise location and GSM communacations for connect to owner. Tracks objects worldwide via SMS. Open hardware and free source code.

GSM Security system. The GSM Security System supports two SIM communication, 3 alarm zones, 2 output relays, built-in battery. iButton, SMS and Voice calls control.

Microcontroller based digital counter. Can be used as a basis for microcontroller based visitor counter or another events counter.

GPS/GSM/GPRS modem Watchdog monitor. GSM modem watchdog timer, the application to watch the status of the satellite modem. Based on ATtiny13V microcontroller. Also contains power supply and battery charger circuits.

Combined MEMS sensor for robots and inertial navigation systems. Three axis gyroscope and three axis accelerometer. The high precision and low cost sensor based on ADXL203 accelerometers, ADXRS300 gyroscopes, AD7718 DAC IC and ATmega8 microcontroller.

AT91SAM7S256 Development Board for AT91SAM7S256 ARM7-TDMI microcontroller. USB connector, 2 RS232 interface, 4 buttons, 5 programmable LED, on board voltage regulator 3.3 V with up to 1 A current and 18.432 MHz crystal

Interface projects.

Ethernet to SPI converter. Low component count, save space and time-to-market solution for adding high-throughput Ethernet connectivity to traditional embedded systems.

Power electronics.

30 W AC/DC switch mode power supply. 85 VAC – 265 VAC Input, 24 V, 1.25 A output.

Ultra low cost 30 W AC/DC switch mode power supply. 180 VAC – 265 VAC Input, 24 V, 1.25 A output.

Powerful transformerless AC/DC power supply. Simple, low cost, easy to assemble, not isolated power supply, 12 V, 100 mA.

12V 5A DC/DC Power Supply based on TPS5450 IC. 12 V, 5 A (6 A peak) output, 14 - 36 V input.

Analog electronics.

4 channel precision current loop receiver. 4 - 20 mA input, 0.1 % nonlinearity, individual galvanic isolation, 50 ksps 12-bit resolution, SPI interface.

Precision 4-20 ma Current Loop Transmitter. Up to 12 bit PWM, low total error with PWM freq 1...4 kHz: < 0.1 %.