Schematics of delabs

The basic digital circuits are Flip Flop and Counter, both are here. This circuit can be cascaded to make even a 6 digit event counter, even a simple frequency counter can be made.  Digital Timers, Counters and Clocks These are best done with… more »

The 555 Astable oscillator gives a square wave output at pin 3, The output drives two LEDs, LED1 lights up when pin 3 is low and LED2 when pin 3 is high.  Astable 555 Timer Flasher  The 555 can source (LED2) or Sink (LED1) upto 200mA. It can… more »

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 give a running lights effect.  Running Lights with 555 and CD4017 The decade counter-divider CD4017 has 10 outputs,… more »

This is the best Instrumentation OpAmp, Great CMRR, ensure supply has no ripple and keep analog and digital grounds separate. Ri can be replaced with a trimpot and resistor to alter gain. Connect a preset ends to pins 1 and 8 and preset wiper to VCC for… more »