Tain
@tain
Member
Joined: 2023-03-16 3:03 pm
Last seen: 2023-05-07 8:05 pm
Topics: 2 / Replies: 15
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RE: 1970s VW Diagnostic Machine

@davee thanks. Sorry It was the pzem 15 that I cooked so I moved on to the 17, I’ve ordered a serial converter to try and read the output. However I...

1 year ago
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RE: 1970s VW Diagnostic Machine

@inst-tech sounds like a lifetime of experience you have there.

1 year ago
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RE: 1970s VW Diagnostic Machine

@inst-tech Thank you, I used IN5817 as you suggested and it works a treat

1 year ago
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RE: 1970s VW Diagnostic Machine

Hello again, hope everyone is well. Thank you all for your help. I settled on a circuit based on the DigiKey article that @DaveE sent me. I've...

1 year ago
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RE: 1970s VW Diagnostic Machine

@inst-tech @davee Thanks both I've ordered schottky diodes, resistors and capacitors, plus 3 more esp32s just in case :o) Thanks again for y...

1 year ago
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RE: 1970s VW Diagnostic Machine

@davee Please can I check I have understood what is going on in the circuit you drew for me? the diodes are sized such that they reverse ...

1 year ago
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RE: 1970s VW Diagnostic Machine

@davee Thanks Dave that article is a great find. I will have a go at drawing what I "think" Ive understood :o) Cheers

1 year ago
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RE: 1970s VW Diagnostic Machine

@inst-tech well spotted, many thanks

1 year ago
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RE: 1970s VW Diagnostic Machine

@davee thanks, I have some voltage dividers and will order some diodes and try again :0)

1 year ago
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RE: 1970s VW Diagnostic Machine

@will thanks, I have some voltage divider boards with 7.5 and 30 resistors. The voltage when the engine is running an be around 14.5v so these should...

1 year ago
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RE: 1970s VW Diagnostic Machine

@robotbuilder thanks for these links, I hadn’t seen the third one before, lots of useful thoughts

1 year ago
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RE: 1970s VW Diagnostic Machine

Here is a drawing of what I would like to do, however how best to protect the esp32 from 12v?

1 year ago
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RE: 1970s VW Diagnostic Machine

@robotbuilder Thanks for the reply, I will give one of the online drawing utilities a go and post a diagram Cheers

1 year ago
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Replies: 24
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RE: Audio Loop System Problem

Looking at the drawing I’m not sure the microphone module is wired up correctly this is a useful pdf particularly page 8 what is i...

1 year ago
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