This circuit simulates the flipping of a coin by merely pressing S1' Of course, the electronic version, if used for important decisions (or experiments), can't be loaded or weighted and is 100% random.
The circuit has two LEDs that flick alternatingly, in a frequency rate determined by C1, when power is ON. When you press 51 the circuit stops immediately and only one LED remains ON. Power supply can range from 5 to 12 volts, and this means that you can use AA cells in a Portable version.
Some components can be altered according to the intended application: Cl, for instance can be altered in a range from 0'01 lo 0-47uF. You can also use a touch sensor to stop the tosser or increase R1's value to up to 10,000,000 ohms.
The schematic diagram for the coin tosser is shown in circuit. Only one g"t" " 49gg lC is used as oscillator to produce random pulses in this circuit' components placement on a homemade printed-circuit board is shown in
circuit. The circuit can easily be housed in a small plastic box.
Position of the polarized components, such as the LEDs and electrolytic capacitor, should be observed.
Parts List - Coin Tosser
ICl - 40938 CMOS Integrated circuit
LEDs - Common red, yellow or green
S1 - SPST Momentary switch
R1,2 - 10,000 ohm, 114W,5% resistors
R3 - 1,000 ohm, 1l4W, S% resistor
C1 - 0.1uF ceramic or metal film capacitor
C2 - 100uE 16 WVDC electrolytic capacitor
No comments:
Post a Comment