Single Digit Voltmeter with LM311
2021-07-09
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. ThisRead More
Printer Port 256 Relays 16K Dot Matrix
2020-02-25
Using this circuit on Printer Port, one could drive 256 Relays or 16K LEDs as Dot Matrix display. It can be used to drive a Large size multiplexed LED dotRead More
Simple Water operated relay
2020-02-25
This was done in my early days, i have upgraded it, it ought to work, reduce the number of transistors to make it less sensitive, also a lower value inRead More
Digital Interface Part Two
2019-09-13
Continuation of Digital Interface Discussion, only my part of the communication here. This will help you understand some common methods and issues.Read More
Digital Interface Conclusion
2019-09-13
Here i am listing the last few parts in this Interface discussion. Only Points to remember are listed. Resistors attenuate voltage or reduce. Current flow has to be limited. TheRead More
Digital Interface Third Part
2019-09-13
Only my Messages are combined here to create paragraphs. Related to Interfacing an Embedded System to external circuits. Pull up means a resistor connected from a point to +V. PullRead More
Digital Interface Basics
2019-08-19
After a long time a thread of discussion. It is about digital interfacing of embedded system. Only Education Points listed. Initials and country of origin also will not be mentionedRead More
Relay Driver – Electromagnetic
2018-09-28
This circuit is a standard way of driving Small Power Relays from Control Signals generated by Logic or Opamp Circuits. C2 and R5 form a snubber which improves the lifeRead More
