Total solder points: 271 Difficulty level: beginner 1 2 3 4 5 advanced Advanced UP/DOWN counter K8035 , part ounting . c le p o e rp g, ..
Features & Specifications Features: Count up or down. Count input trough on-board push buttons or by external pulses. Display modes : Normal or time (hh:mm and mm:ss). An internal oscillator allows time measurement. Programmable pre-set value with equal output. Self diagnostic at power up. Comes whit easy board to wire connector (20cm wire). Comes in handy for people counting, part counting, score keeping, Specifications: Counter Input EQUAL Output Max. Counting speed Max.
Assembly hints 1. Assembly (Skipping this can lead to troubles ! ) Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 Make sure you have the right tools: • A good quality soldering iron (25-40W) with a small tip. • Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called ‘thinning’ and will protect the tip, and enables you to make good connections.
Assembly hints 1.
Construction 3. Zener diode. Watch the polarity ! 1. Jumpers J : 10x ZD... CATHODE 2. Diodes. Watch the polarity ! CATHODE D1: 1N4007 D2: 1N4007 D3: 1N4148 D4: 1N4148 D5: 1N4148 D6: 1N4148 D7: 1N4148 ZD1 : 4V7 ZD2 : 4V7 4. Resistors D... : : : : : : : : 10K 10K 10K 10K 10K 2K2 2K2 2K2 : : : : : : : : : : : : 2K2 4K7 4K7 10K 10K 10K 10K 10K 10K 10K 10K 390 (2-2-2-B) (4-7-2-B) (4-7-2-B) (1-0-3-B) (1-0-3-B) (1-0-3-B) (1-0-3-B) (1-0-3-B) (1-0-3-B) (1-0-3-B) (1-0-3-B) (3-9-1-B) 5. Pushbuttons.
Construction 6. Voltage Regulator. 8. LED. Watch the polarity! LD1 : 3mm Red. LD1 CATHODE VR1: UA7805 9. Ceramic Capacitors C... 7. IC sockets. Watch the position of the notch! 10. Transistors. T1 T2 T3 T4 T5 T6 T7 : BC557C : BC557C : BC557C : BC557C : BC557C : BC547 : BC547 11. Resistors R...
Construction 12. Connector 15. Electrolytic capacitor. Watch the polarity ! 17. IC, Check the position of the notch ! 10p C8 : 470µF C9 : 10µF C... 13. DIP Switch 16. Display DS - 4 4 IC1: VK8035 (Programmed PIC16C57) 3 2 1 ON 4 3 2 1 ON ! 14. Quartz crystal X1: 4,1943… MHz. SA39-11EWA X...
Connection 18. Connection 1 2 3 4 5 6 7 8 9 10 123 4 5 6 7 8 9 10 1 GND 6 GND 2 + VA 7 + 5V 3 + VB 8 Count Down input (B) 4 GND 9 Count Up input (A) 5 E. OUT 10 GND The grounds are internally connected. * E.out : 5V / 50mA max.
Connection Hook-up when using an adapter Hook-up when using a transformer Count Up Count Up 10 9 8 7 6 5 4 3 2 1 Count Down + 5V E. OUT RELAY 10 9 8 7 6 5 4 3 2 1 Count Down + 5V E. OUT RELAY TRANSFORMER - K8035 + ADAPTOR Fuse 100mA K8035 L Fig. 1.0 N Fig. 2.
Operation 19. Operation When all connections are made, the four LED displays will light up and the Kit number will appear “8 0 3 5” after which following messages appear : r x. x x Version number TEST Self-test is working GOOD Internal parts are working correctly If an irregularity is found during the self-test, an error code will appear, when GOOD appears then the unit is ready for use. Error code Description Err. 2 Error in the keyboard section. Err. 3 The switches are in the wrong position.
Operation Counting pulses can be applied to the unit in two different ways : 1. + 3V to 12V pulses with respect to ground. 2. Use the + 5V connection for push buttons or relay contacts when there is no power supply from an external source. Press “Reset” button briefly to reset the readout. “0000”. Press the “UP” button to increase the actual value with one. Press the “DOWN” button to decreases the actual value with one.
Operation 1. COUNTER SETTINGS DIP SWITCH FUNCTION OFF Decade counter 1 Modulo 60 : hh:mm (23.59) 2 Modulo 60 : mm:ss. (59.59) ON 1 1&2 2. DEBOUNCE SETTING Normal debounce 3 Long debounce 3 3. INPUT SETTING External pulses Internal oscillator 4 4 ATTENTION : When changing the position of one of the switches, the current counter value and the pre-set value will be erased.
PCB 20.
Schematic diagram 21. Schematic diagram. R9 10K +5V DY4 DY3 DY2 DY1 A R1 B C D E F G DP SW4 SW3 SW2 SW1 R4 T1 T2 R10 BC557 3 12 14 a A A 13 b 11 c 5 d 4 e 2 f 1 g 10 DP DY1 SA39-11EWA R11 BC557 10K 14 13 11 5 4 2 1 10 10K 3 12 a AA b c d e f g DP T3 BC557 BC557 3 12 14 AA 13 a 11 b 5 cd 4 e 2 f 1 10 g DP DY4 SA39-11EWA 3 12 14 a A A 13 b 11 c 5 d 4 e 2 f 1 g 10 DP DY3 SA39-11EWA DY2 SA39-11EWA R12 10K R2 R3 R5 R6 R7 R8 R1....
VDD VR1 UA7805 I O GND D1 1N4007 D2 1N4007 C4 100n C8 470µ X1 4.
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