"digital"-tagged Public Circuits

3-bit counter PUBLIC

Minimal 3-bit digital counter.

by speedy | updated May 18, 2012

3-bit   counter   digital   flip-flop  

Light Sensitive Counter Circuit PUBLIC

A possibly complete light sensitive counting circuit with 3 digits making use of 311, 7414, 7490, and 7447 ICs and 7-segment displays.

by lucasmoten | updated May 15, 2012

311   7-segment-display   7414   7447   7490   de-bounce   digital   led   phototransitor   schmitt-trigger  

XNOR BJT Circuit PUBLIC

This is how I constructed an XNOR TTL Logic Gate using NPN BJT transistors.

by digitalcircuitman777 | updated March 27, 2012

bjt-transistor   digital   digitalcircuitman777   logic-gate   ttl   xnor  

XOR BJT Circuit PUBLIC

This is a way I have constructed an XOR TTL Logic Gate using NPN BJT transistors.

by digitalcircuitman777 | updated March 27, 2012

bjt   digital   digitalcircuitman777   logic-gate   transistor   ttl   xor  

Debounced Input for Switch or Open-Collector PUBLIC

A Debounce circuit for use with a schmitt trigger and switches or open-collector/opto-couplers. Has 1ms debounce time as shown.

by thefekete | updated March 26, 2012

analog   debounce   digital   open-collector   schmitt   switch  

Inverter BJT Circuit PUBLIC

This is how I constructed an Inverter TTL Logic Gate using an NPN BJT transistor.

by digitalcircuitman777 | updated March 26, 2012

bjt   digital   digitalcircuitman777   inverter   logic-gate   transistor   ttl  

Digital Input Hysteresis ("Schmitt Trigger" behavior) PUBLIC

All digital element inputs in CircuitLab currently show hysteresis effects (VIL=2.0, VIH=3.0).

by mrobbins | updated March 22, 2012

digital   hysteresis   schmitt-trigger  

Digital 3-bit ROM PUBLIC

Digital 3-bit ROM implemented using muxes.

by hevans | updated February 26, 2012

digital   rom  

Digital counter PUBLIC

by mrobbins | updated November 13, 2011

dac   digital   op-amp