Anyone with high speed scope, please share the test signal please.
Anyone with high speed scope, please share the test signal please.
There's no need for high end gear ;-) Just check out the source code! Large caps are charged with pulses until a specific voltage is reached. Multiply the number of pulses with the pulse width and you'll have the time. Then use the famous equation for charging capacitors to get the capacitance.
OIC, thanks Markus for the the explanation on the cap measurement method ! Its just I'm lazy to go through the source code !
As my question, so this thing can not be used on low voltage cap ?
OIC, thanks Markus for the the explanation on the cap measurement method ! Its just I'm lazy to go through the source code !
As my question, so this thing can not be used on low voltage cap ?
Awesome build! Just came across this diy ESR meter on Hackaday:
http://hackaday.com/2013/03/16/testing-caps-with-a-diy-esr-meter/
I have been looking for a cheap way to test caps, I may have to look into a diy solution!
Awesome build! Just came across this diy ESR meter on Hackaday:
http://hackaday.com/2013/03/16/testing-caps-with-a-diy-esr-meter/
I have been looking for a cheap way to test caps, I may have to look into a diy solution!
I looked at the design today also. And decided to build one. So tore down a couple of pc power supplies to rob the step down transformers out of. But ended up making 2 bench power supplies out of them.
Anyway ordered the one posted here in this thread today.
Any reason for removing ESR and L? Is this an issue of code space in the Atmega168 ?
Do you still offer compile code?
software and programmed the chips with the AVR extreme burner. It worked fine but then I found out that Karl was working on an improved version of your original design so I purchased the other version of the component tester version 2.2 on exxy.com and also a couple of Atmega328 to play with.
I haven't compiled for a long time. I come from a strictly assembly language background (z80, 8088, 6800, 8051, 68HC11) so here I am again downloading the WinAvr suite and trying to figure out how to use it.
And it would not turn on Boy did I feel stupid. Anyway I will give anything a second try. So I ordered another one.
And it would not turn on Boy did I feel stupid. Anyway I will give anything a second try. So I ordered another one.You didn't unplug the display, and then plug it back - but out by one pin? Easy to do.
Makefile option NO_NANO Specific activity complements.
Extended function GetVloss for capacitors with more than 5nF, previously 50nF.
The self-test Let's remove the short-circuit test at 4 is monitored, AllProbesShorted by Markus R.
The GetESR function is used during calibration to determine the zero resistance (pin-dependent).
GetESR function is also used for resistance values ??below 10 ohms.
Function GetESR replaced by new assembler function.
New feature GetVloss to measure the voltage drop after a charge pulse at small 45uF capacitors.
The GetESR function converted to assembler to make the time sequence regardless of the compiler optimization.
Assignment of Flash and EEPROM memory optimized.
BAT_POOR level changed in the Makefile to mV indication, indication of just 1.3V +0.1 V warning.
ESR measurement for capacitors from 0.45uF supplemented with 500kHz ADC clock.
The resolution of the inductance is set to 0.1mH Resistance 680 ohms.
The Pinreihenfolge with individual diodes is issued in accordance ATmega168/328 EBC_STYLE.