Single Digit Voltmeter with LM311
I wanted to design a logic probe as a tutorial, but there were many good ones in the web so i have tried to design a single digit voltmeter. This circuit is a design,...
Power Supply Regulators and MOSFET Transistor
HELLO THERE …COULD anybody pls help me with a place to get more information on the following components…cant seem to find it anywhere. W20NB50 W8NB100 found them in a liteon power supply pack for...
Sound activated RF remote relay
I am to build a circuit that operates off some kind of sound input into a sound activated circuit, preferably some kind of voice operated relay circuit. This relay is then to operate some...
Simple Millivolt Source for Calibration
This is a modification of a mV Source that can be whipped up easily. You could use a DPM or Multimeter to read the output. The ability of this circuit to perform well depends...
Thermostat with digital display for PTC1000
Thermostat with digital display, I need a electronic thermostat with a 2 digit display… Do you have anything like that?? mail from EU can you explain how you plan to use it. then i...
OR gate with two 555
This shows how to OR gate two 555, when one 555 cycles at a low frequency a valve turns on an off, the second 555 stretches the ON duration of the pulse with a...
Mains Voltage Monitor
i need a circuit design to detect generator voltage and display with LED for certain value of voltage. for example red LED”s for voltage under 180 V, green LED for 180-220V and Yellow LED...
Metal Detector Circuits Problem
With the best wishes for you. I found your address and browsed your website. I have a question and hope to take your help and answer. I need to good metal detector’s circuit and...
