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The sound active control circuit.
The sound active control circuit -- Using the sound to active the relay to drive the load. Mic → Pre amp → CR Differential circuit → Schmitt circuit → Rectifier and filter → Toggle flip flop → bjt and...
View Article4mA thru 20mA Loop to 0V thru +5V or +10V Converters
These circuits are for converting a 4mA thru 20mA Loop signal to 0V thru +5V , suitable for an ADC input or a +10V When using a LM358 OPA, the closest specified lowest swing is approx 20mV above 0V. If...
View ArticleTSOP1738 when used as a Beam Break Detector
NOTE: When using the TSOP1738 IR Receiver Module in a Beam Break application it is necessary to interrupt the 38KHz signal being generated by the IR Emitter. An example is a 'People In/Out Counter',...
View ArticleTwo State Debounced Pushbutton
There are many functions to be found on the Internet for software button debouncing. The logic is simple. When a button input goes high or low, wait for a brief 30ms and ensure that the button state...
View Articlea first version of mini lathe motor speed control
Hi everyone, I've been working on a motor speed control for my mini lathe, because the board that I had in it finally blew out, after about 14 yrs. of hard use, I tried to order another one, but my...
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PWM, "another hobby level transistor design lesson"
Hi, Here is another hobby level transistor circuit design, I went through my course design books looking at the formulas for designing a schmitt trigger circuit, and it explained well all the design...
View ArticleMatching a high ouput Z high volt level source to a lowZ ground reference...
In this video we continue on with our schmitt trigger circuit, we always have a idle, standing voltage at the output of a schmitter circuit, thats going to be around the voltage value of the threshold...
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A research paper and the knowledge gained
I took up engineering for the sole purpose of learning something innovative and out of the ordinary. Having been brought up in an environment where I was taught that the world might stop without the...
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