DESCRIPTION. The HCFB is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. Data sheet acquired from Harris Semiconductor. SCHSC − Revised October The CDB types are supplied in lead hermetic dual-in-line. CDB datasheet, CDB pdf, CDB data sheet, datasheet, data sheet, pdf, Texas Instruments, CMOS Presettable Divide-By-N Counter.
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Thanks for the response. The datasheet uses Nand followed by invertor to get the AND functionality. This was fixed by the addition of a -very- mickey mouse transistor amp stage.
First problem was that the data sheet says to tie the outputs together with a NAND gate Would appreciate datashfet feedback before I commit it to perf board and build a second one. Sorry for the schematic, I drew it up in MSPaint and it has been a while since I’ve drawn a schematic.
I spent the last two evenings putting cc4018b together on a breadboard. I would use a 74LS which is a synchronous counter that can be programmed. I could not, however, run the output of a to the data pin with any success unless I first amplified it. You’re right about the datasheet, I missed the dot on the tip of the gate, mea culpa.
The carry out is always 1 clock pulse wide. If I end up making more of these, do you know if there’s a equivalent for the ?
CDB 데이터시트(PDF) – TI store
The hard part comes in that if you want to divide by odd numbers, datassheet need to throw in some external logic. You could add isolating diodes so that you do not have that worry.
If you want to be more flexible, a simple atmega P chip can be used and programmed to provide any pattern you want to output. Second problem was that, probably because of the low voltage of the littlebits power supply, the AND gate output wasn’t pushing enough current to drive the data in on the A 74LS08 has more output drive with a slightly different pin out. Trigger pulse goes in datasheet, depending on how it’s set, for every x pulses eatasheet you get 1 pulse out.
I assume you are careful to make sure that only one of the Dip switches is on at a time.
If anyone cares to give it a good proof reading, again, it would be appreciated. You can buy binary encoded switches Your arduino midi interface is actually next on the build list.
Datashret can use the DIP switch and diodes to provide the same sort dayasheet count selector, or just stick with binary input. I made it mostly for driving microsequencers at “triplet” rates.
The data pin on the will work fine from the common of the dip switch.
Regarding the transistor though, whether it should be able to or not, the is capable of driving both an output led and triggering a littlebits microsquencer straight from the data pin, as long as it’s doing an datassheet division. The is a twisted ring counter, there are several ttl programmable counters. Everything is also made a bit more difficult by the output being part of the feedback that determines the division rate. Use invertor between carry out and load to load the start value into the counter when it rolls over.
Basically it’s a straight datasheet functionality of a cd divide by n counter. I would be particularly interested in knowing what the proper value of the resistor between the emitter and ground should be.
A selector switch would’ve been a lot better than a dip datsaheet, but it was readily available.