AX-1 Digital Circuit LabBoard

Transcription

1 AX-1 Digital Circuit LabBoard for School 1 AX-1 Digital Circuit LabBoard The economical digital circuit experiment board contains the nescessary tools for supporting the basic experiments. This is greatly suitable & affordable for young experimenters and all beginners. 1. Features : DC supply (regulated) Clock generator with 4 frequencies 1Hz, 10Hz, 100Hz and 1kHz Logic switch 8 channels Logic monitor 8 channels Binary decoder 1 ch. to decode Binary to BCD (0-9) on LED segments Pulse switch 2 channels Supply voltage input +9V from external DC adapter Breadboard 2.5 x 3.5 inches. 390 contact points. Includes : AX-1 board, documentation, Wires, DC power adapter and some of Digital ICs for experiments. 2. AX-1 Layout and Schematic In figure 1 shows the AX-1 Digital Circuit LabBoard layout and figure 2 shows the completely schematic diagram.

2 2 AX-1 Digital Circuit LabBoard for School AX-1 Digital circuit LabBoard ON DC input 9Vdc LOGIC MONITOR 4543 D4 D3 D2 D1 D0 BCD DECODER POWER GND D4 D3 D2 D1 D0 D C B A dp AX-1 DIGITAL CIRCUIT LabBOARD a b c d e f g h i j PGX PULSE GENERATOR 1Hz-1kHz k Hz BIT LOGIC SWITCH D4 D3 D2 D1 D "1" "0" PULSE a b c d e f g h i j + P1 P0 Innovative Experiment Co.,Ltd. FREQUENCY D4 D3 D2 D1 D0 Figure 1 Shows the layout of AX-1 Digital Circuit LabBoard

3 AX-1 Digital Circuit LabBoard for School 3 D4 D3 D2 D1 D0 8-Bit LED Monitor LED101-LED108 RED x8 R101-R x8 D C B A dp INPUT IC BCD DECODER R201-R x8 a b c d e g f dp common DSP201 DSP201 LED 7 SEGMENTS COMMON CATHODE PULSE switch R301 10k R302 10k RN401 1k*8 S302 P1 P1 S408 S401 S31 P0 P0 D3 D1 D4 D2 D0 8-Bit LOGIC SWITCH R501 10k S501 FREQ. 4 C /50V 1 IC501 PGX4100 FREQUENCY (Hz) k R LE01- LE04 RED x4 K001 DC9V S001 POWER C /16V C /50V IC C003 47/16V C /50V LED001 POWER R PULSE GENERATOR Power supply Figure 2 Shows the completely schematic diagram of AX-1 Digital Circuit LabBoard

4 4 AX-1 Digital Circuit LabBoard for School 3. How to using experiment tools on AX-1 Digital Circuit LabBoard How to use the power supply The AX-1 board requires external DC supply in range +9 to +12V 500mA. The DC adaptor is included in the set. On board has reuglated DC power supply. The connecting of DC supply can do directly and DC voltage has the common ground. Apply the DC voltage from external DC adaptor to DC jack adaptor. The positive polarity must be center pole and outside is Negative polarity Regulated IC AX- Green LED for power indicator ON DC input 9Vdc LOGIC MONITOR 4543 POWER Switch : Slide up for turning on and Slide down for turning off D4 D3 D2 D1 D0 BCD and Ground supply output for experimental POWER GND D4 D3 D2 D1 D0 D

5 AX-1 Digital Circuit LabBoard for School How to use the Pulse Generator (1) Select the frequency value by pressing the FREQUENCY swtich. The indicatior will shift following the switch pressing. User can select 4 frequency values 1Hz,10Hz,100Hz and 1kHz. (2) Connect the output to the experimental circuit. PULSE GENERATOR 1Hz-1kHz PGX k Hz FREQUENCY How to use the logic switch To select logic 1 - Slide up the switch shaft. It supply at output point, that means logic 1 To select logic 0 - Slide down the switch shaft. Output voltage is about 0.8V, it equal logic 0 "0" "0" "0" "0" "0" "0" "0" "1" 8-BIT LOGIC SWITCH D4 D3 D2 D1 D0 "1" "0" Slide up to select logic "1" to D0 output D4 D3 D2 D1 D0 Slide down to select logic "0" to D1 to outputs

6 6 AX-1 Digital Circuit LabBoard for School How to use the logic monitor This tool is shown the logic status. On this board has 8 channels which enough for all digital circuit experiments. At default, the all input are pulled down to ground. The LED output off that mean logic 0 occur. To test the logic level in the circuit, connect the input point to a test point on the circuit. Observe the result at the LED monitor. Light ON mean the point under test has logic status 1" Light OFF mean the point under test has logic status 0" Attention: The logic monitor can use with every digital circuit, which use supply voltage or TTL level. LOGIC MONITOR Lights in Red, means getting logic "1" D4 D3 D2 D1 D0 Not lights, means getting logic "0" D4 D3 D2 D1 D0 "1" "0" "1" "0" "1" "0" "1" "0" How to use the LED 7 segment decoder This tool s function is decoding binary data to decimal data and drive to LED 7 segment for displaying. On this board has 1 units. At default, the display show 0 because all inputs is pulled-down to ground. It causes the all inputs receive 0 data. To use, fed data signal into DCBA inputs and dp input, in case wants to use the dot point of LED 7 segment. For driving the dot-point in LED, connect the positive voltage ( max.) at dp point. Thus, please notice like logic switch and logic monitor. It can connect suddenly, don t connect the ground line. AX-1 Digital circuit LabBoard 4543 BCD DECODER D C B A dp

7 AX-1 Digital Circuit LabBoard for School How to use the Pulse switch It s used for supplying the single pulse for the digital circuit. Normally, the output will be logic "High" or "1". After pressing the switch, output changes to logic "low" or "0" until release. It is noticed that, logic switch, logic monitor and debounce switch can work suddenly, do not use/connect the ground line. PULSE P1 P0 However the signal output will not perfect pulse signal. The addition Debounce switch required for making the perfect pulse signal. Use can contruct the circuit on bredboard with the schematic below. P1 PULSE SW. Construct this circuit on the breadboard R1 10k R2 510 S1 C µF

8 8 AX-1 Digital Circuit LabBoard for School Breadboard Basics A breadboard, as the one showed on Figure below, is a device that allows one to assemble electrical circuits without the burden of soldering. The breadboard is divided into two sides: left and right. Each side has many holes that can accommodate 22 or 24AWG (American Wire Gauge) wires or the legs of chips (ICs). The holes on any particular side of the breadboard are electrically connected to the holes to the left and to the right. There are no electrical connections between holes that located above or below one another. Holes on the right half are not connected to any holes on the left side and viceversa. A B C D E F G H I J This figure shows the electrical connection inside the breadboard.