Clap Relay
No description available.
Dark and Light Activated Relay
The potentiometer adjusts the trigger level. The diode in the circuit diagram is specified as 1N914, which is suitable for light-duty relays; however, since the 1N914 is a signal diode, it is not ideal. A 1N4001 or a better alternative...
zener Flyback diodes issues and pull-in & hold current issues in this Relay circuit
Although this may be a basic question, there is still some struggle with it. In this schematic, two zener diodes D1 and D2 are connected back-to-back across relay coil L1. The breakdown voltage (BVds) is -30V for Q1. The question...
toggle switch schematic with relay
This circuit will activate and deactivate a relay with the press of a button. Any momentary push-to-make switch can be utilized. Pressing the button once will activate the relay, while pressing it a second time will deactivate the relay. The...
Sound activated switch circuit
An infra-red or wireless remote control has the disadvantage that the small, handy, remote transmitter is often misplaced. The sound operated switch has the advantage that the transmitter is always with you. This project offers a way to control up...
dyi setup and debugging guide
This page discusses the differences between assembled Open USB FXS dongle boards and DIY boards. While the assembled boards are fully tested and quality control approved, DIY boards may encounter various issues during assembly. Fortunately, most of these issues can...
relay circuit diagram
Here are some circuit diagrams for driving relays from a microcontroller. Ensure the use of a 5-volt relay (this refers to the coil, not the load circuit) and verify that the relay has a sufficient rating for the load being...
Schiepatti Switch
A highly versatile switch that can be controlled from any channel on a typical Futaba or JR radio setup. This switch was designed to trigger the shutter on digital cameras without the need for a servo attached to the camera....
Power Off Delay Relay circuits
The two circuits below illustrate opening a relay contact a short time after the ignition or light switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to +12...
relay interfacing with spartan 3 primer
The Spartan-3 board features external 5V relay interfacing, as depicted in the accompanying figure. The ULN2803 is utilized as a driver for the FPGA I/O lines, with the driver outputs connected to the relay modules. A PTB connector is provided...