Astable Multivibrator with 555 Timer
This is a demo of the popular 555 timer. you can try out the project on this page by a javascript simulation. Press the Red […]
555-Circuits
Voltage to Current Convertor using LM723
his Circuit converts a voltage control output from a Process Controller to be converted into a Current Control if the AC-Drive or Valve needs a […]
InfraRed LED Flasher for Optical Switch
This circuit is used to detect objects by reflected infrared light. It can be built into a cylindrical enclosure just like an inductive proximity switch. […]
555 watchdog for uC and uP systems
When the microcontroller hangs due to a spike, EMI or RFI etc. the 7555 will reset the uC, if proper power supply design is done […]
Pulse width modulation using 555
IC1 astable gives a fixed square wave at pin 3, C1 and R1 derive uS trigger pulses from IC1 and this will trigger IC2 monostable […]
Fixed frequency Variable duty cycle with 555
This circuit is based on a very old application note from exar, in this the frequency is fixed by IC1 and IC2 -P1 controls the […]
Frequency Divider 74HCT4040
U1 7555 is a CMOS version of 555. The 555 here is in Astable Oscillator mode, C1 and C4 are decoupling capacitors 0.1uF value, ceramic […]
Running Lights with CD4017
The 555 Astable generates a clock for this circuit, an oscillator giving a square wave output at pin 3 which is counted by 4017 to […]