My Homemade VLF Detector
No description available.
Frequency warning alarm
A low-frequency oscillator (Q1) modulates a high-frequency oscillator (Q2) along with its associated timing capacitor. The output frequency varies continuously.
The circuit comprises two primary components: the low-frequency oscillator (Q1) and the high-frequency oscillator (Q2). The low-frequency oscillator is responsible for...
Frequency-Ratio Monitoring Circuit
This circuit generates an output frequency that is linearly proportional to the ratio of two input frequencies. Each pulse of the bias frequency will open a switch for a period equal to half of the second input frequency, allowing a...
Help with a schematic please
A project is underway to construct the CountryHick DI as illustrated on DIYFactory, incorporating a few minor modifications. The final design aims to be a 1U unit with four inputs.
The CountryHick DI (Direct Injection) box is a crucial tool in...
STEORN DEMO LIVE & STREAM
The positioning of a coil by even a millimeter can significantly impact the success or failure of a project. When there are tens of millimeters of possible positions, the likelihood of incorrect placement—and thus failure—greatly increases. This situation necessitates an...
Cat / Dog Detector
This can be used to control entry on a Cat or Dog Door. NOTE: There may be some changes and improvements coming. However, this circuit does work and you can build it as shown. The PCB shown below is available...
DIY kinetic energy harvester
A DIY kinetic energy harvester utilizing the electromagnetic method to generate electricity. The materials that will be used are currently known.
The project involves creating a kinetic energy harvester that converts mechanical energy from motion into electrical energy through electromagnetic induction....
Home Made Metal Detector
This homemade metal detector circuit will assist in locating objects made from materials that possess relatively high magnetic permeability. It is not appropriate for detecting...
This homemade metal detector circuit is designed to identify objects composed of materials such as iron,...
VLF Radio Receiver circuit
This version sports a 2nd audio amplifier stage at Q3. The output level with this version is sufficient to drive a crystal headphone to a comfortable volume. The "crystal" headphone is like those used on ye olde crystal radios. A...
5 Minute Signal
For the past year and a half, a group based in Ann Arbor, Michigan, named GO-Tech has been formed, uniting individuals interested in creating projects using technology, such as hardware, software, metal, and wood. This initiative is referred to as...