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Forum Index : Electronics : Bryan's Inverter build

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Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1789

Posted: 03:03am 30 Mar 2026

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Ok I desoldered the 10 pin connector and clearly saw the H02 pin connection didn't have any solder so now the 10 pin connector sit about 5mm high as I soldered the top pads

Now tried again and still voltage to R52 so thought ok the only thing this can be is the ribbon connector

Got out my 10 pin ribbon connector for my AVRDude as shown below

H02 L02

H02 L01

H01 L01

L02 L01

So hopefully these scope pic's are right

Bryan1

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Joined: 22/02/2006
Location: Australia
Posts: 1789

Posted: 04:49am 30 Mar 2026

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Now while I had the board running decided to take some voltage checks, the 18V zener was around 18 volts and the TIP25 measured right.

Taking voltage reading at the mosfets pads where the positive probe is on Vbat+(26.03 volts) and the negative probe used for the test.

L01
G 16.94
D 9.92
S 26.03

H01
G 9.90
D 0
S 9.90

L02
G 17.2
D 10.3
S 26.03

H02
G 10.3
D 0
S 10.3

tinyt
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Joined: 12/11/2017
Location: United States
Posts: 546

Posted: 02:46pm 30 Mar 2026

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Bryan1 said Now while I had the board running decided to take some voltage checks, the 18V zener was around 18 volts and the TIP25 measured right.

Taking voltage reading at the mosfets pads where the positive probe is on Vbat+(26.03 volts) and the negative probe used for the test.

L01
G 16.94
D 9.92
S 26.03

H01
G 9.90
D 0
S 9.90

L02
G 17.2
D 10.3
S 26.03

H02
G 10.3
D 0
S 10.3

To confuse the enemy?

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 3098

Posted: 08:46pm 30 Mar 2026

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Quote To confuse the enemy?

So it would seem, converted to ground ref.

Vs = 26.03 WRT Gnd
WRT + WRT Gnd Vgs
L01 L01 Vds
G 16.94 9.09 9.09 Vgs
D 9.92 16.11 16.11 Vds
S 26.03 0

H01
G 9.90 16.13 0
D 0 26.03 9.90
S 9.90 16.13

L02
G 17.2 8.83 8.83
D 10.3 15.73 15.73
S 26.03 0

H02
G 10.3 15.73 0
D 0 26.03 10.3
S 10.3 15.73

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