Wisconsin Parts Database Instructions and Discussion Team/Group > INDIANA
> Motors and tools
> Add
> Used
> Without Warranty
> 50 MC14021BCP / MC14021 / CD4021BCP / CD4021 cmos 4021
50 MC14021BCP / MC14021 / CD4021BCP / CD4021 cmos 4021
(50) MC14021BCP / MC 14021BCP / CD4021BCP /
CD 4021BCP, CMOS 4021 ON SEMICONDUCTOR
8-STAGE STATIC SHIFT REGISTERS
New old stock (NOS) DIP ICs. ON Semiconductor MC14021BCP 8-stage static shift registers. 4021 CMOS ICs are equivalent to the CD4021 / CD4021B / CD4021BCP, MC14021 / MC14021B, SGS4021 / SGS4021B, HCF4021 / HCF4021B, HEF4021 / HEF4021B, TC4021 / TC4021B, and other CMOS 4021 equivalent ICs.
The 4021 static shift registers have many electronic uses! The 4021 is typically used for asynchronous parallel input or synchronous serial input / serial output data queueing, parallel-to-serial conversions, delay lines, frequency dividers, and general purpose register designs. 4021 shift register ICs are really neat for designing sound effects generators (e.g. sirens, warblers, chirpers, etc.), light effects generators (e.g. "flickering flame" electric lights), random number generators, pseudorandom number generators, random noise generators (e.g. white noise, pink noise), delay lines, and theremins (i.e. science fiction movies / horror movies eerie special sound effects) of many different types using its very advantageous parallel and serial inputs. Its special effects light flickerer applications are great for Christmas decorations/displays, fake fireplaces, horror houses, school science projects, romantic settings, toys, games, gadgets, etc., making it a favorite IC for crafts as well.
Random noise generators and random light generators are also very useful for fooling potential burglars and home invaders by randomly generating sounds and/or lights just like people would do if present there at the time, and the 4021 can be coupled with ultrasonics to produce pest controllers that because of the unpredictability of the random nature of the sound bursts and/or light flashes, it is almost impossible for pests to anticipate and get used to - much better than the commercial ultrasonic pest controllers that periodically transmit a short "ultrasonic" beep (actually, about 15 KHz, which just borders on the ultrasonic) which pests soon get used to.
I both design and collect sound effects and light effects circuits, including theremin circuits, so if you have any circuit designs you would like to share with me or know of a good website or book that has these circuits, please let me know.
The 4021 also has great music applications (e.g. echo, distortion, eerie effects, background noises, editing, etc.). 4021s can be expanded by cascading to produce static shift registers much larger than 8-stage with expanded parallel inputs for high-resolution applications way beyond the 8-bits parallel input of a single 4021. Use a RAM, ROM, FPGA or other programmable memory (not included) to dump your sound or light program into the 4021 and then shift it out serially, with the option of adding your own changes, deletions and additions editing along the way.
I have a ton of these 4021s, but being one of my favorite ICs I use a lot of them, so future availability is not guaranteed. I am very interested in all other static shift registers (which in some but not all circuit applications the 4021 can substitute for) and am actively trying to acquire many more of, such as the CD4006B / MC14006B, CD4014B / MC14014B, CD4015B / MC14015B, CD4031B / MC14031B, CD4557B / MC14557B, CD4562B / MC14562B and/or other static shift registers (their equivalents for the CMOS 4006, 4014, 4015, 4031, 4557 and 4562 are also OK, e.g. SGS4006B, HEF4015B, HCF4031B, etc.), especially DIP. So if you need other static shift registers, stay tuned to this webpage. And I have tons of other ICs I am selling, mostly CD40xx and CD45xx CMOS, as well as many TTL ICs and Linear ICs (Analog ICs), and other electronic parts in this webpage (if you can't find what you want there, email me, and if I have what you need, I'll put it in this webpage for you).
