New version of the 8Channel PWM LED ChaserThis neat little circuit provides 8 LEDsdirectly driven from the PIC along with a single mode control switch. Here's a couple ofvariations I've built based on the basic PWM LED chaserdescribed on this page. They run exactly the samebase code, just use different sequences to suit thelayout of the boards.Xmas Tree ChaserRound chaserBend the LEDs through 90 o and you have a UFOchaserThe heart of the LED chaser isthe PIC 16F628A microcontroller, IC2. The program that runs on this chip controls the LEDsattached to the output port pins. Resistors R1 thru R8limit the current through LED1 - LED8 to a safe level thatwon't damage the PICs I/O ports or LEDs. Resistor R9provides a pull-up for the input connected to switch S1.R10 pulls up the PIC's MCLR reset signal during normal operationwhile allowing the input to be raised to 12.5 volts duringin-circuit programming.
JP1 provides connection for anICSP programmer such as a PICkit2 making it easy to reprogramthe PIC without removing it from the PCB.Capacitor C1 is used todecouple the 5 volt power supply to the PIC. If you're building thecircuit on a breadboard or stripboard you should ensure it islocated close to the PICs Vdd connection (pin 14 ).Power is supplied to thecircuit via J1 and must be smooth DC between 9 and 14 volts.The PIC requires a preciselycontrolled 5 volt supply and this is provided by IC1, a 78053-terminal, 5 volt regulator. Typical current drawn by thecircuit with all LEDs on is only around 100mA so the voltageregulator doesn't require any additional heatsink.
Capacitors C2 and C3stabilize the regulator. Diode D1 protects the circuit fromaccidental reverse polarity of the input voltage.Notes:. Capacitors C2/C3stabilize the voltage regulator and may beomitted for most applications, however the schematic showsthem and the PCB layout makes provision for them.
I used to use this circuitry to program the 16F628 PIC using FPP. It doesn't work with the 16F628A. Programming 16F628A. Thread starter konservatorium; Start date Oct 3, 2006; K. Konservatorium New Member. I do not need to design and build a new circuitry but I need to adjust the values for the program to work with my device. One other useful feature is that you can switch it from internal 4MHz to slow speed internal 37kHz on the fly so you can used it in power sensitive applications (but the 16F628A is a better choice if you need ultra low power operation). The two most important features are that there is 2k of program memory and 224 Bytes of RAM.
Ifyou're unsure whether you will need them then it's best toinstall them. The latesthigh brightness LEDs are very bright even with 270R currentlimiting resistors. However, if you do need to change these resistorsfor some reason take into account the maximum currentthat the PIC can source from an I/O port pin is 25mA, andalso be aware that the output voltage will drop as youincrease the load. If you install LEDsthat require a lower value series resistor you may find youare unable to program the PIC in-circuit via the ICSPheader. This is because the I/O port pins on the PICthat are used for In-Circuit Serial Programming are shared with the LEDs. The programmer may be unable to drive theselines when lower value resistor are used. With the270R resistors and PICKit2 programmer, In-Circuitprogramming should work without problems.
JP1 is an ICSP headerto allow programming of the PIC while installed in thecircuit. It is only required if you intend toconnect a programmer to modify the sequences or code.It is not supplied with the kit.Pin 2 of this header connects to the circuit's5 volt supply via the link LK1. Since the circuitprovides an onboard 5 volt regulator, the circuit should bepowered from this and the link left open.
Pin 1 of the ICSPheader JP1 is nearest the LEDs. If you have an external5V supply, you can omit D1, C2, C3 and IC1. You willneed to install wire links in place of D1, and between pins1 and 3 (in-out) of IC1. The circuit will now workfrom the external 5V supply. Be sure to connect it upcorrectly because without D1 in place there is no reversepolarity protection.You can buy all the partsneeded to build this project from most component suppliers worldwide. In the UK you can get everything from Rapid Online andI've included a parts list with their part numbers below.AllRapid parts/descriptions correct at 2-October-2008.
Amba Wellness Program Pennsylvania House Rating: 5,7/10 9527reviewsTHIS EVENT MAY BE CANCELED BY AMBA DUE TO THE LOW. Lake Lions Club will be sponsoring a wellness program at the Conneaut. AMBA Blood Screening. 7, Good Health Fall Fest, at the Penn Yan elementary School. The other is a spring program, the Apple Fest in Geneva.
AMBA (Annual Multiphasic Blood Analysis) Wellness Programs also helps set up low-cost medical tests. The events are organized by local groups. Testing is held February to November.Staff reports New Hartford Kiwanis and AMBA will partner for the 36th annual Blood Screening Wellness Program, which will take place from 6 to 10 a.m. Saturday, Oct. 23, at the Perry Junior High School gymnasium on Weston Road.
The main panel consists of more than 30 tests and screenings for coronary diseases, anemia, kidney disease and liver disease.The cost is $40, with $35 given to AMBA for the provided panel of tests, and $5 payable to New Hartford Kiwanis. To make an appointment, call 800-234-8888. For information, call 794-7725.THIS EVENT MAY BE CANCELED BY AMBA DUE TO THE LOW NUMBER OF REGISTRATIONS. PLEASE CALL BEFORE 5PM 9/8!.!
On Saturday, September 18, 2010 the Conneaut Valley Lions Club and the Conneaut Lake Lions Club will be sponsoring a wellness program at the Conneaut Lake Fire Department. AMBA Blood Screening, as well as Glaucoma Screening and Blood Pressure Testing will be offered for the $35 AMBA Blood Screening fee plus a $5 donation at the door to the Lions. Several optional tests are available for an additional fee with a separate script from a Physician. This is a unique opportunity to have your blood and eye health checked for a very low fee.
Even if you have insurance, the cost of this screening is much lower than most deductibles. Post navigation.