momentary action with a wireless switch
#wireless
#switch
#momentary action
#RF
#transmitter
#receiver
#remote switch
#wireless control
#home automation
No description available.
Adjustable-sensitivity field-strength indicator
The LED illuminates when the RF field exceeds the pre-set field strength level. Germanium diodes are recommended. Additional information: Transistors (NPN) include 2N2222, 2N3393, 2N3904, or equivalent.
The circuit described is a simple RF field strength indicator that utilizes an LED...
Rf Preamplifiers Circuit
In this basic MAR-x-based circuit, both the input and output consist of a single DC-blocking capacitor (C1 for the input and C2 for the output, respectively). The DC power supply network, which includes L1 and R1, is connected to the...
building rf remote control
The simplest approach to creating a remote-controlled robot is to repurpose a low-cost wireless toy car by removing its receiver module and remote control. Alternatively, one can design a custom RF remote using an ASK (Amplitude Shift Keying) based transmitter/receiver...
handheld RF-Powermeter for multiple sensors up to 12 GHz
A few years ago, a diode-sensor based RF power meter was built using a 68HC11 microprocessor. Prior to that, an analog RF power meter with a thermal power sensor was developed. The datasheets for logarithmic amplifiers, which promised a measurement...
wireless FM bug
This project is a miniature, VHF FM (wideband) Wireless Microphone transmitter of the type that are commonly referred to as BUG's. Note that "BUGS" are illegal but "Wide-Band Frequency Modulation Wireless Microphones" (WBFMWMs) are not, as so many people have...
RF Induction Meter
This instrument measures inductances from 0.1 microhenry to 3 millihenries, divided into four ranges set by a switch. It operates from 12 volts and is powered by eight AA type cells attached to the unit. Initially, Drew Diamond's unit in...
the design of the intellectual wireless signal transducer of ARM
The intellectual wireless signal transducer is designed for major transducer applications and typical sensor output signal designs. It is essential to first analyze the outgoing signals from the transducer. Typically, the output of the transducer is a standard electric current...
RF Circuitry Links
The 7th overtone of 18 MHz (17m) is 144 MHz (2m) directly within the CW region. Icarus is a high-altitude balloon (HAB) project funded by advertising revenue, which has successfully launched numerous balloons that captured impressive photographs. Robert Harrison is...
14W CW TRANSMITTER
A low-power two-stage FET transmitter designed for the 80-meter amateur band utilizes a Pierce crystal oscillator that does not require an output resonant circuit. A DC milliammeter can be connected across a 150-ohm resistor in the gate circuit of the...