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Led light table only lit in one corner
Led light table only lit in one corner





led light table only lit in one corner

Master Reset line low sets all latches low via RESET diodes.

#LED LIGHT TABLE ONLY LIT IN ONE CORNER HOW TO#

This circuit may be used as a guide to how to do what you want using other means, probably. Warning: DO NOT let Olin see this diagram!!! Or, if you like, you can use the other output from each latch, the 2-input NAND gate, and drive the LED to ground (being careful to get the LED polarity right). If you decide to go with a CMOS family such as 74HC, this will still work. This is important if you decide to use 7400 or 74LS - those technologies do not source current well, but they sink current just fine. If you want to use discrete logic, such as 7400/74LS/74HC, etc, the total package count is 5 ICs - 1 7400, 2 7410 and 2 7411.ĮTA - You'll notice that the LEDs are driven by being pulled down, with current coming from VCC. Pushing any of Switches 1 - 4 will cause the corresponding LED to turn on, and disable any other switch activations by way of the AND gates. In the schematic, Switch 5 is a reset, and pressing it causes all 4 outputs (at the LED) to go high, turning off the LEDs. Simulate this circuit – Schematic created using CircuitLabįlip-flops can be synthesized from gates, although you may well decide to take Spehro's advice.







Led light table only lit in one corner