OR gate with two 555
2021-04-17
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 ofRead More
Electrical Symbols that you should Know
2021-03-23
Found these in openclipart and wikipedia, A collection of basic electrical symbols you ought to know. You could use these symbols to add in your documentation by cut and pasteRead More
Metal Detector Circuits Problem
2021-03-16
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 goodRead More
What is Saturation in Transistors
2020-11-04
Date 8/30/06 Simon and delabs Simon: hello, delabs: hello Simon: we have many meanings for saturation, delabs: means turning on, also means no longer linear, or it is got fixedRead More
Flashing Mains Neon Lamp
2020-08-25
Here is a Neon Flasher circuit (untested) for a user request at Circuits FAQ. This can be built into a switchboard or a gadget for indicating Live Power. D1-C1 formRead More
Working with SMD and SMT PCB
2020-07-07
One thing tho, i would like to request you to send me some procedures on how to work with surface mount devices (SMD’s). I cant get the IC as DIPRead More
FET Current Source and MOSFET
2020-01-12
This is a constant current source using a FET. This is the most simple replacement to series resistor to limit current. The N-Channel FET BF256C can give 15mA current. SimpleRead More
Perpetual Candle – White LED Lamp on Ni-Cd
2019-02-08
This is a easy to build LED lamp circuit for Learning and building skills. This is the first draft schematic V 1.0. It will need improvements for Higher Power Lighting.Read More