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I built this yorkie's ESR meter which is working as described. Can anyone tell me how to modify this circuit to include an LED to display when a capacitor is tested and is found to be shorted. I attach this diagram.
Can anyone come across this sop-8 chip which is not available locally in my area. Is there any replacement one available please let me know.
Chip details::
30mA per Channel 250nA 81 dB Instrumentational OP Amps 2.2V~36V ±1.1V~18V LT1498 8 Pins 8-SOIC (0.154, 3.90mm Width)
In a 1.8 litre electric cooker, what is the capacity of thermal fuse used. Whether 10a or 15a fuse is used. What is the temperature (100 degree celcius or higher) at which it will cut off. In a sense can 10a : 100 degree celcius be used. Can anyone describe what is the best one to be used.
Thank you for all the info shared
I could not make out the voltages as stated under. Kindly guide me what next.
1. TLC274CN pins
1-2.70
2-2.71
3-2.68
4-14.15
5-2.68
6-2.71
7-2.71
8-2.64
9-2.71
10-2.70
11-0
12-2.70
13-2.73
14-3.56
2. 555 pins
1-0
2-2.77
3-2.75
4-5.38
5-3.58
6-2.78
7-(-0.03)...
Thanks for the reply
1. I checked the voltages with DMM especially on 7107 and were reading 2.83 on almost all pins that went to segment displays.
2. The flashing numbers were random from 4:?? to even 10:?? per second.
3. A jumper wire from 'in lo' to 'com' stopped flashing and stood still...
Thanks for the suggestions. I tried all the possibilities but in vain. The same display continues with numbers flashing when nothing is connected. I used ceramic capacitors in the circuit. Should I change these with myler / polystrene / tantalum capacitors. Because the author's images show...
Thanks a lot for all the replies I got from all. My only doubt is : there are 2 variable resistors in the circuit, values of which are 1K and 25K. I could not get a preset / pot for 25k. I used 20k preset instead of 25k. Will this VR of 20K make a difference in not zeroing the display and also...
Thanks a lot for all the replies I got from all. My only doubt is : there are 2 variable resistors in the circuit, values of which are 1K and 25K. I could not get a preset / pot for 25k. I used 20k preset instead of 25k. Will this VR of 20K make a difference in not zeroing the display and...
I connected the other side of copper plate as per the diagram. I rechecked 2-3 times and corrected them and the final layout is as per the
attached file. As per the instructions I could not zero in while adjusting R21 (1k preset). On power on it shows as per 4 segment displays -
1, blank...
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