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tape content monitor – Circuit Schematic
tape content monitor
The capability to determine which part of the tape is empty and which part has a recorded data can help accelerate your work of looking for a certain program. T...
live wire sensor – Circuit Schematic
live wire sensor
This electronic device works similar to a metal detector but it does something special: it detects live electrical wires. Such a gadget is highly useful for ele...
light activated switch – Circuit Schematic
light activated switch
The brightness of the surrounding light controls the function of this circuit. The light sensor used in this circuit is a light dependent resistor(LDR). This LD...
cto frequency converter – Circuit Schematic
cto frequency converter
In some cases of temperature measurements, it is more advantageous to convert the measured value into a frequency than into a voltage. A temperature to frequenc...
Solid State Radiation Detector with LCD Complete – Circuit Schematic
Solid State Radiation Detector with LCD Complete
I added a PIC and LCD to my basic radiation detector and can now display total counts over time(up to 24 hours) or Counts/Sec and relative gamma strike energy ...
A Solid State Photodiode Gamma Radiation Detector – Circuit Schematic
A Solid State Photodiode Gamma Radiation Detector
Photodiodes convert light into current and this current can be coverted into voltage and amplified. Sounds simple right? Well, when trying to detect Gamma ph...
Dew sensor – Circuit Schematic
Dew sensor
Dew sensor. Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used...
Color sensor – Circuit Schematic
Color sensor
Color sensor. Colour sensor is an interesting project for hobbyists. The cir- cuit can sense eight colours, i.e. blue, green and red (primary colours); magenta,...
Dark Detector with LM555 – Circuit Schematic
Dark Detector with LM555
Dark Detector with LM555 . This is a dark detector circuit. This circuit will generate sound if no light source and silence when light falling on CdS. CdS : Cad...
Lightning Activated Camera Shutter Trigger – Circuit Schematic
Lightning Activated Camera Shutter Trigger
Lightning Activated Camera Shutter Trigger. This picture was taken using the circuit. This circuit is used to trigger a camera`s electronic shutter circuit when...
Constant Temperature Circuit – Circuit Schematic
Constant Temperature Circuit
Constant Temperature Circuit. (C) G. Forrest Cook 1997 Introduction This circuit is a generic low power temperature controller that can be used for stabilizing ...
Automatic Fan Control circuit – Circuit Schematic
Automatic Fan Control circuit
Automatic Fan Control circuit. This circuit is ON / OFF 12V DC fan or die CPU fan factory IF temperature above normal again temperature.You Can Feed the tempera...
Ultrasonic Switch – Circuit Schematic
Ultrasonic Switch
Ultrasonic Switch. C ircuit of a new type of remote control switch is described here. This circuit functions with inaudible....
Light Sensor Circuit Using Op Amp 741 – Circuit Schematic
Light Sensor Circuit Using Op Amp 741
This is a one of the light sensor. This circuit is a dark sensor that is based on op amp 741 IC as main control. This circuit is a simple design for sensor the ...
Very Low Frequency VLF Detector Circuit – Circuit Schematic
Very Low Frequency VLF Detector Circuit
Low frequencies predominantly cover our earths atmosphere. This range of frequency may be created by many different sources which may be quite unknown and stran...
Circuit Diagram Wiring – Circuit Schematic
Circuit Diagram Wiring
This Bat Detector Circuit is authored by Chris Eve. Basic tests with a variety of salvaged electret microphones all showed good response to 50kHz and beyond, th...
Ultrasonic Sensor Switch – Circuit Schematic
Ultrasonic Sensor Switch
This is a ultrasonic motion detector (or movement detector) circuit. The circuit claimed has a high movement sensitivity. Even air moving (hot air rising, wind ...
ultrasonic motion detector – Circuit Schematic
ultrasonic motion detector
The circuit claimed has a high movement sensitivity. Even air moving (hot air rising, wind blowing) will trigger it when the trimpot is set near the most sensit...
Low Cost Water Pump Controller Circuit – Circuit Schematic
Low Cost Water Pump Controller Circuit
Low Cost Water Pump Controller Circuit. The sensors applied to the circuit could be any two conducting probes, preferably resistant to electrolytic corrosion. F...
Dark and Light Activated Relay – Circuit Schematic
Dark and Light Activated Relay
The potensiometer adjust the trigger on` level. The diode in the circuit diagram shows to be 1N914. This is ok if you have a light-duty relay, also the 1N914 is...