This project is a broadband field strength sensing probe that has a 15cm antenna. It is able to detect radio energy and read the output on a common multimeter millivolts scale. It can be used to test 4MHz, 35 MHz, 55 MHz, 100 MHz, 384 MHz, 900 MHz, cell phone, and microwave oven. The meter is […]
Are you being spied – A Simple Field Strength Indicator (field strength meter) Read More »
What is Stun Gun An electroshock weapon is an incapacitant weapon used for incapacitating a person by administering electric shock aimed at disrupting superficial muscle functions. One type is a conductive energy device (CED) fires projectiles that administer the shock through a thin, flexible wire. Other electroshock weapons such as stun guns, stun batons, and electroshock belts administer an electric shock by direct contact.
What is a stun gun – How to Make Stun Gun Read More »
Bill details how a microwave oven heats food. He describes how the microwave vacuum tube, called a magnetron, generates radio frequencies that cause the water in food to rotate back and forth. He shows the standing wave inside the oven, and notes how you can measure the wavelength with melted cheese. He concludes by describing
How a Microwave oven works? Read More »
This 330 MHz remote control sends timed sequences of control pulses to accomplish complicated tasks. You can probably tell that I used a lot of solder flux on this board. Lots of flux not only helps the solder wet to the copper, but it also greatly reduces solder bridges. You can probably tell that I
Multifunction 330 MHz Remote Control With an ATTINY2313 Simulating the PT2264 Encoder Read More »
A serial interface and bias supply for the Seiko-Epson G1216N000 using an AT90S2313 because there just aren’t enough applications examples for this display on the web. Download Assembler source code I was looking for an LCD display that I could use to display waveforms on the workbench. The selection criteria for the display module itself
The 10k potentiometer, just above the ISP connector near the lower middle of the board,is used to adjust the display contrast according to your vertical viewing angle. DOWNLOADS ATTINY2313/AT90S2313 AVRStudio assembler source, LDCbutons040904Ca.htm ATTINY2313/AT90S2313 AVRStudio assembler source, UPDATED FOR COMPATIBILITY WITH NEWER VERSIONS OF THE ASSEMBLER, LDCbutons040904C_updated_a.htm Truly LCD driver include file, 2x16lcdinc.htm tlcd309Ba.htm AT90S8515/ATMega8515
A serial interface for the Truly MTC-C162DPLY-2N using ATmega8515 Read More »
As simple as it gets and still works This LED flasher occurred to me while reading about negative resistance in transistors. It was reported that Leona Esaki, who was at Sony at the time, had been surprised to see a negative resistance region while investigating production defects in transistors which lead to his thesis work
Simplest LED Flasher Circuit Read More »
A circuit that drives a red LED from a 1.5 volt battery and simulates an incandescent light. Duty cycle can be changed by selecting resistor values. Photo 1. This printed circuit board is 3 cm long. The first prototype was made with through hole parts. This is a single sided surface mount board with one
Finally, white LED’s are bright enough to use in a practical stroboscope. This circuit can operate as a bench-top stroboscope that, in conjunction with an oscilloscope or frequency meter and bench top power supply can accurately measure rotational speeds, or it can be operated hand-held from a single 9V battery, using a marked scale to
White LED Stroboscope Read More »
Overview Where I live most of the time, the AC power drops out upon occasion. This used to leave me groping around in the dark for a flashlight. I could have bought a battery-backed up “emergency light” for about US$35, but being basically metal boxes with floodlights attached, they would make my living room look
White LED Battery Powered Power Failure Light Read More »
