Beautiful clean build. It looks very professional. Good thing you are keeping extra parts on hand in case in the future all that is available are Chinesium parts.
Hi, Thank you for your excellent video on the leakage tester. I find it very informative. I am waiting for the voltage regulator to arrive. I’m in the UK. I would like to add the meters that you are using. Would you mind telling me what they are? Thank you.
I purchased those meters from Amazon. Here are the links: www.amazon.com/gp/product/B07V4DZH8L/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 www.amazon.com/gp/product/B098MKJ8MP/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
@@raybecson9374 I bought these over a year ago, so the specifications are not fresh in my mind, but I think they were 10 megohm input impedance, so they didn't need any buffering.
The thing about analog meters is their input impedance is typically low. This circuit is highly current limited. So I was concerned that the analog meters might load the circuit down too much. The original intention of this from the AWA was to connect your digital multimeter to it for the voltage and current reading. The input impedance of those DMM's is usually 10 megohms. If you search through xraytonyb's videos, he built one of these as well. He used an op amp buffer to raise the input impedance so that the analog meter did not affect the measurement. That may be the correct way to use the analog meter.
Beautiful clean build. It looks very professional. Good thing you are keeping extra parts on hand in case in the future all that is available are Chinesium parts.
Very interesting.
Can you show were the digital meters are connected (which pins on the pcb)?
Thanks for this - very nice build. Just starting on mine and I liked your meters so ordered a couple. Could you tell me what enclosure you are using?
It is a Hammond console type enclosure. Digikey # HM3108-ND
Thanks!
Hi,
Thank you for your excellent video on the leakage tester. I find it very informative. I am waiting for the voltage regulator to arrive. I’m in the UK.
I would like to add the meters that you are using. Would you mind telling me what they are?
Thank you.
I purchased those meters from Amazon. Here are the links:
www.amazon.com/gp/product/B07V4DZH8L/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
www.amazon.com/gp/product/B098MKJ8MP/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
Thank you for the link. Will I need any impedance buffering for the voltmeter?
@@raybecson9374 I bought these over a year ago, so the specifications are not fresh in my mind, but I think they were 10 megohm input impedance, so they didn't need any buffering.
I’m about to build this up…
Any regrets about using digital meters ? I had planned using dial meters, easier to see or not do you think ?
The thing about analog meters is their input impedance is typically low. This circuit is highly current limited. So I was concerned that the analog meters might load the circuit down too much. The original intention of this from the AWA was to connect your digital multimeter to it for the voltage and current reading. The input impedance of those DMM's is usually 10 megohms.
If you search through xraytonyb's videos, he built one of these as well. He used an op amp buffer to raise the input impedance so that the analog meter did not affect the measurement. That may be the correct way to use the analog meter.