Quick notes: Where possible you should use TTL chips. They're less sensitive to static, but require a 5v power supply.
When using a bread board, make sure you use SOLID wire.
tokyo wrote:How would I use this chip to achieve what I want? Would I insert it into a breadboard and attach the wires connecting each circuit through the breadboard? Is there a source that explains this so I can apply it to my prototype?
For a full circuit you would need:
1) 2 Push Buttons (2 terminal)
2) A 7805 chip (5 volt DC voltage regulator) http://www.electrokits.com/downloads/pd ... rchild.pdf
3) A 7404 chip (hex inverter) http://en.wikipedia.org/wiki/Inverter_(logic_gate
4) A 74270 chip (SR Latch) http://docs-europe.electrocomponents.co ... 0a3a93.pdf
5) 2 resistors in the 1k ohm to 10k ohm range.
To assemble the circuit you would:
1) Connect the battery output to the 7805 - 5 volt regulator. Connect positive battery output to the 7805 "input", and battery ground to the 7805 ground.
2) Connect ground from the battery or 7805 to ground on the circuit board, and "output" from the 7805 to power on the circuit board. Most circuit boards have a red "power" column and a black "ground column." You now have 5v available on the breadboard.
3) Connect the power column to VCC on both your 7404 inverter and 74279 SR latch chips. Connect ground from the breadboard to "ground" or "vss" on the 7404 and 74279.
4) Connect power to one of the terminals for each push button.
5) Connect ground to the free terminal for each push button, but put the resistor in line with each.
6) Connect the push buttons to the 74279 chip: One grounded (via resistor) terminal of each push button terminal connects to 2R the other to 2S. This circuits a bit weird if you haven't done this before...I'll explain in a bit.*
7) Connect the output 2Q from the 74279 chip to A1 on the 7404 hex inverter.
Connect your outputs 2Q (74279) and Q1 (7404) to relays that will drive your 2 circuits....you're done.
*This circuits works because the logic chips require a "low" or "high" signal. High comes from the positive terminal, low from ground. When the button is pushed and power goes "high" a very small amount of voltage also drains to ground (due to the resistor), but the vast majority is available as an input to the chip. When the button is not pressed the "ground" passes the "low" signal.