Discuss AT28C16 EEPROM learning experiments in the UK Electrical Forum area at ElectriciansForums.net
For increased reliability of operation:
The button is staying in a open position and is closed/contacting when is pressed.1. Connect a 0.01uF capacitor between 5 and 1.
2. Connect a 0.1uF in parallel with a 1uF electrolytic between 8 and 1.
Is the pushbutton 'normally closed' as you have drawn?
On the 555.For increased reliability of operation:
1. Connect a 0.01uF capacitor between 5 and 1.
2. Connect a 0.1uF in parallel with a 1uF electrolytic between 8 and 1.
Is the pushbutton 'normally closed' as you have drawn?
Have you tried this? That cmos AND should be able to drive one 74LS input in your case R1. The Qd connects to R2.I have to take my wife out but quickly the 4000 series output can only drive one 74LS series input. Try disconnecting the nand so the and only drives the reset input.
You could do those voltage measurements I suggested recently. You could do the trial without the NAND in circuit.A new AND Gate , a new breakthrough ! But still not good.
Now Im trully desperate. I have NO idea what to do next.
Please see this small video here and tell me what you think.
The voltage of the output of the AND when 93 is at 0b0000 (0decinal) is 0.025V = 25mVWith the 93 at 0000 please measure the voltage of the output of the AND with reference to OV. It has to be less than 0.8V to be interpreted as a logic 0 by the 93.
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