IC is a CMOS counter/divider integrated circuit, actually a decada counter with 10 decode ouputs. It is 5 stage Johnson counters having 10 decoded. DESCRIPTION. The HCFB is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise .
|Published (Last):||13 September 2011|
|PDF File Size:||11.22 Mb|
|ePub File Size:||2.92 Mb|
|Price:||Free* [*Free Regsitration Required]|
Write Your Own Review You’re reviewing: Be the first to review this product.
The diagram shows the sink current. Click ask a question to be the first. If that works, and you want to make them brighter, you’ll need to either find a that has greater current ratings on the output pins or add some transistors. The pulse from the IC is generated from pin 3. UK Deliveries If you live on the UK daasheet and don’t have any large materials or lithium batteries in your order it will cost 3. A 16 DIL pin Decade Counter with 10 decoded outputs and inputs including, clock, reset, and clock inhibit.
For the split second that the timer supplies voltage to thea random LED is lit up. Would you like to answer one of these unanswered questions instead? Note that the circuit you linked has a datashret resistor connecting the LEDs to ground negative. It is quite possible datashfet you need more current than the can handle.
The decade counter has ten output lines, one to represent each of the numbers 0 to 9, there is also a carry out line which goes high as the counter goes from 9 back round to 0. It couldn’t be that though since sometimes the same LED will flash two or three times in a row ocassionally.
Thanks for the heads up! That’s equivalent to 1. The counter is reset to zero when the reset line is held in a high state. Curd You are correct, I had not paid attention to the schematic properly.
HTTP This page has been moved
If so, is it normally closed or normally open? We do not charge a packaging or handling fee for this service, and you will receive an email when your order has been processed, you can collect half an hour after receipt of this email.
Also note that the timer never actually “stops” supplying voltage; it supplies a high voltage, and then it supplies a low voltage, repeatedly. Problem with timer and counter Ask Question. For the split second that it stops daatasheet voltage all the LEDs dimly flash on.
SIMPLE • DIGITAL • FAST
Delivery times vary for international orders depending on the service selected and the destination. Collection If you would like to collect your order, or use your own courier then there is an option you can select during checkout.
The wires from the battery snap and also the ones from the toggle switch are fed through small holes in the PCB. Drawing shows a pushbutton between Vcc and the actual power supply that is not on the schematic.
Decade counter (4017B)
Home Questions Tags Users Unanswered. If you spend between 40 and 48 – Rest of the world These orders are sent via UPS, and the cost is dependant on the service you choose at checkout. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this adtasheet the association bonus does not count. Continuous pulsing by datashdet IC results the LEDs of the B turning on and off in sequence, creating a ripple effect.
Max quiescent current at 5V: Note that for the sake of simplicity, I only included 5 LED’s in the schematic. If you spend over Didn’t think about that.
This ensures that they cannot be accidentally pulled off the circuit easily. Product Description The decade counter has ten output lines, one to represent each of the numbers 0 to 9, there is also a carry out line which goes high as the counter goes from 9 back round to 0. I’ll give it a go and see what happens. Per Curd’s comment, I am also including the source current diagram from the datasheet.
Supplying no voltage requires either a high-impedance output or leaving an input pin floating. As Tony mentions in his answer, if the LEDs have a typical forward voltage of 2 to 2. I’m attempting to make a circuit that flashes each LED sequentially.
Any idea what’s going wrong here? And to top it off, the CD has a dedicated reset pin; hurray for edumacation For the given circuit current flows through LED if output is high the source current is relevant.