This non-contact ac voltage detector circuit, using digital IC CD4060 as main components and resistor and LED display only. it is use 9V battery as power supply.
Digital logarithmic sweep signal generator circuit
Digital logarithmic sweep signal generator circuit by use average digital, It is designed to use together with frequency generator by voltage controller. [...]
Simple crystal oscillator 1-10MHz using inverter gate
This Simple Crystal oscillator Circuit using 74LS04 that provided square wave of 1MHz to 10MHz, Use inverter gate IC and control frequencies with crystal [...]
IC 4017 CMOS-Decade counter/divider. When we build the 10 LEDs running light for hobby. Often use IC-4017. This really neat chip contains counter,decoder[...]
Increasing current gain of transistor relay driver
How to control a load with a digital circuit like Arduino? A transistor relay circuit may be answered for you. The output pulse from the digital circuit to biased the…
This is On-off SCR control circuit with logic gate IC. SCR will turn ON when input A gets bias current. But SCR will turn off if its input B gets current.
Normal multimeter cannot check it. This circuit can help you.