22-07-13 433 MHz Power Amplifier 2W 20-12-23 Arduino Energy meter INA219 20-05-23 Arduino rf generator 20-01-10 Arduino Christmas Lights show 14-05-03 SIM900 GSM/GPRS 12-03-27 Black Spot II

Front end design of antenna Antenna filter impedance RF field meter How to make aircoils Air Coils (inductance measurement) How to calculate slug tuned inductor More test about slug tuned inductor IF-CAN (Intermediate Frequency CAN) How to calculate toroids TOKO-Variable & Molded Coils Quadrature FM Detectors Ceramic filter LC-meter Improved LC-meter Explore inside of a Radio How a radio receiver works 50 MHz FM receiver (for my 50 MHz crystall controlled transmitters) AM-Receiver for Aircraft communication Synthesizer controlled AM-Receiver for Aircraft communication Cordless phone BUG MC 13136 experiment (Narrow band FM receiver) SA602, SA612 Mixer 78-80 MHz Superfast Scanner 50MHz Receiver for the IR detector Automatic Frequency Control (AFC) Super improved AM-Receiver for Aircraft. 900MHz Cordless Phone Bugging. Mixer testing of FM-receiver DTMF Radio Receiver POCSAG. Post Office Code Standardization Advisory Group RC Receiver for airplane How to make a PCB How to solder smd components MC3362 FM Receiver Xenon Flash Indicator 50 MHz transmitter I (1 transistor, FM) 50 MHz transmitter II (3 transistor, FM) Crystal controlled bugg transmitter FM 50MHz Power Amplifier (transmitter) 50MHz Transmitter for the IR detector Power amplifier class-C Bugs and cockroach Digital Wattmeter for RF based on AD8307 Wife Replacer 500mW FM PLL transmitter 88-108MHz PLL bug transmitter Digitally controlled FM transmitter (Part I) FM PLL controlled VCO unit (Part II) 1.3W Power Amplifier Bird Transmitter RF Power Amplifier Module S-AV10H TOSHIBA 30W Digital Wattmeter for RF (0-500MHz) 1.5W Power Amplifier class-C (Part III) 250MHz RF Generator TR1001 868.35 MHz Hybrid Transceiver Ipod Stereo FM transmitter 1W GPS Jammer GPS Jammer Black Spot II Trinity RF Power Meter 433 MHz Power Amplifier 2W Audio amplifier with squelsh-control 45-860MHz Radio receiver based on UV916-tuner TV-tuner and Spectrum Analyzer Super Scanner 45-860MHz with 0.01Hz stepsize Superior TV-tuner receiver 45-860MHz in 2500Hz step Frequency Counter Introduction to Fundamental Crystal Oscillators VCO-Voltage Controlled Oscillator VCO tester and logger Wireless Frequency counter Poor man's counter 2.5 GHz Frequency counter Exclusive 2.5GHz Frequency Counter Transcendent Frequency Counter PIC16F84 programmer The Smart Switch AD9835 Direct Digital Synthesis (DDS) Vacuum Fluorescent Display (VFD) ISD4002-120 Recording Circuit Basic Introduction to PIC familly Boot Loader software for PIC16F870 Rotator experiment NE555 timer circuit IDE Hard Disk experiments Robot Voice SIM900 GSM/GPRS Arduino Christmas Lights show Arduino rf generator Arduino Energy meter INA219 Software download for all my projects

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