Sferic Detector
No description available.
Radio remote control circuit
The receiver circuit depicted in the figure requires the insertion of a plug into the radio headphone jack. When the radio receiver detects a signal from the transmitter, an audio signal is output from the jack. This signal is then...
Gate automatic lamp circuit
The circuit utilizes multiple integrated circuits to form an automatic lighting device that is activated by door and window sensors. It includes CD4093 digital integrated circuits, a relay, and a power supply circuit. The system typically remains closed when a...
Automatic plant waterer
The unit consists of a sensor, timer, and electric water pump. The sensor is embedded in the soil, and when dry, the electronics operate the water pump for a preset time. The circuit is composed of a level-sensitive Schmitt trigger,...
Making Electromagnetic Weapons
This series focuses on creating Electromagnetic Weapons, specifically highlighting the Electromagnetic Pulse Generator. The last three articles provide further insights. Microwaves, commonly encountered in everyday life, utilize invisible energy to heat food, and can even produce sparks when metal is...
PA1B-02 page of VERON department Nieuwegein and surroundings
Information for radio broadcasting and amateur listening in the VERON department of Nieuwegein (A29) and surrounding areas.
The radio broadcasting and listening activities in the VERON department of Nieuwegein (A29) encompass a variety of amateur radio operations, which serve both hobbyists...
Farnsworth Model GT-051 Bakelite Radio (1948)
"Black Beauty" is a nickname for a classy Bakelite radio set. It features a dramatic, asymmetrical design with deep wraparound louvers and a bullet-like profile, exemplifying 1940s Streamline design. The radio is undergoing restoration of its electronics and cabinet. Originally,...
Sensor-Activated Relay Pulser Circuit
A sensor activates transistor Q1 to turn on the low-frequency 555 oscillator, which generates pulses to control LAMP II. The sensor may respond to variations in light or temperature. Either resistor RA or RB can function as the sensor, depending...
Radio Glen Transmit Selector system
The main box of the Transmit Selector system is designed to be located in the technical rack of a small radio broadcast station. There are four stereo balanced line inputs, either of which can be routed to a stereo balanced...
Add a sensor to a board and measure something with it
This week's plan is to build a device that warns of the potential for a knockdown, which is the process by which an over-canvassed ship is laid over on her beam-ends. The risk of sinking is high during this event,...