Re: ESR meter upgrades
what cpu is in it?
what cpu is in it?
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Re: ESR meter upgrades
Atmega 644pComment
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Re: ESR meter upgrades
good - because the replacement software wont fit a 324
this is actually built for a 1284 but it should work i think
it expects a 20Mhz crystal
changed config files are included for viewingComment
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Re: ESR meter upgrades
i forgot to say,
you need to reprogram the 8 pin microcontroller that controls power, or replace it with a small circuitComment
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Re: ESR meter upgrades
Thank's Stj have you found this better than the original.
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Re: ESR meter upgrades
yes,
lots of new features.
but the biggest thing was the circuit for power.
the original 8pin microcontroller seemed to not go into sleep-mode sometimes and was draining the batteryComment
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Re: ESR meter upgrades
Which ESR meter would you reccomend for testing caps in vintage solid state audio gear? Do i need LCR so i can measure at different frequencys?Comment
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Re: ESR meter upgrades
vintage and solid-state arent 2 words you often hear together.
you mean 70's and 80's ?Comment
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I read EBOOK of Testing Electronic Component and found that
"In order to test the small blue resin coated ceramic disk capacitor which has 104 50v specification,it is possible to test this small ceramic capacitor by making use of analogue meter.
Set to times 10Kohm that has 12v output from the probe to check disorder of ceramic capacitor.
It is not uncommon that testing result of digital capacitance meter is okay,But It show shorted reading when you check it with analogue meter."
Is it really possible to test small ceramic disc capacitor with analogue... -
I have had with regular AA batteries that leak this meter is expensive new I already replaced the battery battery clips once and the same thing happened again and I am tried of so it is getting modified to accommodate lithium ion batteries that are the same size excluding the positive terminal and removing the battery clips I will have enough room for the BMS protection board
I going to put 3 lithium ion battery in parallel with the BMS protection board and a way to charge the battery externally and heat shrink the battery pack and use a JST connector so I easily remove the battery... -
Hello. So I searched and didn't find any posts on this specific problem.
When plugged in USB power meter reads 5v
Doesn't charge battery. I can charge the battery with power supply. So it seems the battery works fine. Laptop started but didn't post on battery.
Original mobo had a shorted cpu it seems.
So I decided I need a new motherboard.
Put the new one in the computer. Connect the battery, I think it starts, don't quite remember, but when I plug the adapter/charger.
5v on the meter. Still won't charge. Can still charge the battery... -
Hi
I want to change the scale of an analog meter, to monitor the charge of an li-ion single cell, so the needle at the end would point 4.2 volts and the 0 on the meter would point 2.5 volts or so, i tried to add diodes or a zener in series with the meter but the changes of the ambient temperature also changes the voltage value on the meter
I wonder how i can accomplish this so the meter would be precise at any temperature ?
Thnaks -
About a month ago we had a transformer jumper wire that burned in two different places between two transformers caused over $200 thousand dollars worth of damage to VFD drives at least 10 of them and a memory card and quite a few power supply as well
Now we have most of the equipment that got damaged back up and running except a feeder that has issues and we are waiting for some parts for
Now we also have another piece of equipment that was blowing fuses on the 110 volt controller switch circuit with the “E” stops and one switching power (24 volt) supply and a transformer...
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