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Since the encoder/decoder pair used here works on negative logic, the decoded signals are fed to an inverter (NOT gate) IC 74LS04. The proper (inverted) signals are then supplied to L293D. so i want to know how the signals are fed to 7404,,,,,, i have tried doing it,, but it is not working...
i have tested motor driver ic separately,,,, according the diagram,,
i have connected all the pins of l293d except the data input pins as shown in diagram,, when i give (+) positive current to pins 2, 7, 10, 15, the motors run
but when i supply (-)...
no sir,, i dont know about any magazine,,,, the thing is , i have completed the circuit but cannot invert the ht12d data....
so i want to know how to bypass 7404 ic......
sir,, according to diagram,, the data coming out from ht12d needs to be inverted using 7404 and then it is to be given to l293d,,,,
my circuit of remote controlled car is nearly complete......
so i want to know how to bypass 7404?....... please help,,,,
when i join the input of l293d, to out pins of 7404,, the motor starts running ,,
even if i dont give any input to the inverter gates of 7404 ......please help....
according to my information,,, for remote controlled car-------
as shown in figure,,,the output of ht12d is given to inverter ic 7404 and then to motor driver l293d,,,,,,,,,, can somebody give me circuit diagrams for ic 7404 and l293d...... please help......
---will the receiver circuit work if I dont connect the VTpin of ht12d ...
in many circuit diagrams,,, vt pin is left unconnected...
---the letters written on ht12e and ht12d differ from each other.....
example----- ht12e A87IGH6..#1 and ht12d B678GH..#1
i have bought them in...
my rf circuit for a wireless car which is not working
I m making a rf circuit for a remote controlled car,,,,
i m using kst tx01c transmitter module and rx receiver module
ht12e ,, ht12d encoder-decoder ics--- the diagrams are:-
but it is not working any LED is not ON.,,, but when i...
the transistor tip30c and diodes 1n4001 are not available in market,,, can i use substitutes of them ....................
tip29c or tip31c instead of tip30c .....
1n914 instead of 1n4001???? please help.........
sir,,,, the transistor tip30c and diodes 1n4001 are not available,,, can i use substitutes of them ....................
tip29c or tip31c instead of tip30c .....
1n914 instead of 1n4001???? please help.........
sir,, i have assembled my circuit as per your diagram,,, but still it is not working,,when i supply 5volts to receiver circuit,, all the LEDs glow for 3 seconds and then turn OFF automatically,,,,,, i have cahnged the ICs and rf modules two times but then also i m getting failure,,,, i have...
sir,, i have checked all the connections ,, they as per my diagrams,,,,, when i supply 5volts to RX circuit,,, all the lights glow ,, but when i ground th TE pin of HT12E all the LEDs which are glowing become off and when i send data by grounding the four ht12e pins as required,,,, there is no...
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