No it is a personnal goal. If I can make all the logic gates on simulator and on breadboards, and I still like electronics after this (lol) I will buy my oscilloscope, Rigol 1054zIs this homework?
Hmm because I am a beginner and I am not sure to know what I am doing lol Is this a correct answer? Haha Thank you for your help. What would be the better curent base? My 3ohms resistor is not enough?hi,
Why do you have Base currents of 1.6Amps.?
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You didn't implement the AND gates correctly.They still receive 4mA, but aren’t they suppose to receive 0mA because of the 2 NOTs on left?
For good saturation of the transistor when on, the base current should be 5 to 10% of the collector current (forced Beta of 10 to 20).What would be the better curent base?
I realy want to undersdand application of the NOT gate on such circuit.Maybe start with diode gates (https://en.wikipedia.org/wiki/Diode_logic), aka Diode-Resistor Logic.
Hi Denis! Do you have a suggestion?You didn't implement the AND gates correctly.
The logic diagram shows that the LED should be lit. REDO the symbolic logic, THEN try your simulation modified accordingly.I realy want to undersdand application of the NOT gate on such circuit.
For now... I tried all your recommandations and it doesn't work. I still get current on the output.
The top transistor in your AND gate is wired as a diode (Q2 in my schematic). You shouldn't have the LED and resistor on the emitter of the bottom transistor (Q3 in my schematic).Do you have a suggestion?
No. Transistors aren't perfect switches. Even when they're turned fully on, the collector-emitter voltage is non-zero. In your sim it's about 80mV for each transistor, which gives a perfectly reasonable 135mV across the pair. This drives a tiny current through the LED.But my NAND doesn't work. The LED still receive current. Do you think the simulator is wrong?
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