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Search: Posts Made By: barry wilkins
Forum: General Electronics Technical Discussion 02-07-2021, 06:17 AM
Replies: 6
Views: 253
Posted By barry wilkins
Re: Battery Charging Peugot Boxer

It was a poor conection.
Yes the van has a Tyco isolator relay that disconnects most of the electronics to stop the battery discharging.
I understand this is a bistable relay
My old van was a...
Forum: General Electronics Technical Discussion 02-06-2021, 12:56 PM
Replies: 6
Views: 253
Posted By barry wilkins
Re: Battery Charging Peugot Boxer

Got to the bottom of it.
A fuse in the power feed from the battery,no mention of it anywhere.

Barry
Forum: General Electronics Technical Discussion 02-03-2021, 10:39 AM
Replies: 8
Views: 298
Posted By barry wilkins
Re: Aneng dt 9205a dvm

It might be the new chip which has 44 pins
R34 is connected to pin 39 (100K) reducing by padding this with 10M has brought up the reading .Its slightly high now .
One of those tiny pots would be...
Forum: General Electronics Technical Discussion 02-02-2021, 11:44 AM
Replies: 8
Views: 298
Posted By barry wilkins
Re: Aneng dt 9205a dvm

Hi I did find some info on line ,which I did not think was correct . It showed a circuit with 7106 IC.
I wiil take a look next week.

Barry
Forum: General Electronics Technical Discussion 02-01-2021, 02:06 PM
Replies: 8
Views: 298
Posted By barry wilkins
Re: Aneng dt 9205a dvm

dont know what happened with the picture
Forum: General Electronics Technical Discussion 02-01-2021, 02:05 PM
Replies: 8
Views: 298
Posted By barry wilkins
Re: Aneng dt 9205a dvm

Hi cant tell what the chip is attached a picture .
I know this was quite cheap ,bought it from Amazon because I had blown workshop one on some Ferrus power supplies, in fact its not bad just a bit...
Forum: General Electronics Technical Discussion 01-31-2021, 12:20 PM
Replies: 6
Views: 253
Posted By barry wilkins
Battery Charging Peugot Boxer

I am having a problem with the starter battery in my motor caravan, the makers info is very poor so I am struggling a bit with this.
As it is Euro 6 I think the charging is done by the ECU,not the...
Forum: General Electronics Technical Discussion 01-31-2021, 11:59 AM
Replies: 8
Views: 298
Posted By barry wilkins
Aneng dt 9205a dvm

Has anybody got the circuit for this meter ?

Thanks

Barry
Forum: General Electronics Technical Discussion 01-27-2021, 09:35 AM
Replies: 8
Views: 372
Posted By barry wilkins
Re: DVM circuits

I could see there was something wrong around the TL 062 opamp ,so I removed it and replaced it with an 072 ,replaced the diodes and capcitors at the same time. A bit more investigation found R 36 was...
Forum: General Electronics Technical Discussion 01-23-2021, 08:30 AM
Replies: 8
Views: 372
Posted By barry wilkins
Re: DVM circuits

Hi thanks to all of you for the info ,I will look at it in a few days .
Not too bothered about fixing it as I have quite a few other meters
1 I keep my car 1 in my tool box 1 in my caravan, 3 in...
Forum: General Electronics Technical Discussion 01-22-2021, 09:08 AM
Replies: 8
Views: 372
Posted By barry wilkins
Re: DVM circuits

Hi attached some pictures cant see any makers name on it .Fixed the noise problem by cleaning the switch ,just seems a problem trying to measures diodes ,very low voltage applied to the device ....
Forum: General Electronics Technical Discussion 01-20-2021, 01:27 PM
Replies: 8
Views: 372
Posted By barry wilkins
DVM circuits

Unforunately I damaged one of my DVM,s when working on some power supplies
measuring some high voltages ,because there was some rf on the dc I was measuring.
It still works but is noisey and it...
Forum: Troubleshooting TVs and Video Sources 01-15-2021, 05:09 AM
Replies: 9
Views: 252
Posted By barry wilkins
Re: SOVOS Flip down TV SVKTV156A

Hi yes cleaned up the mess.
Perhaps when the board was made they did not have the proper surface mounted capacitors.
Attached some more pictures .
Got the 12 volts and 5 volts working .
Just need...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 01-14-2021, 02:56 PM
Replies: 68
Views: 50,701
Posted By barry wilkins
Re: Any experiences with this ESR meter circuit?

I made one some years ago,the only problem was a bit of drift .
I fitted a small bulb in the oscillator ,that cirtainly made a big difference.
Pinched the idea from HP

Barry Wilkins
Forum: General Electronics Technical Discussion 01-14-2021, 02:52 PM
Replies: 11
Views: 593
Posted By barry wilkins
Re: 4017 counter reset problem

Thinking about it I decided to use two transistors in a darlington configuration .seems to work OK .
Next step is to try it out.
Forum: Troubleshooting TVs and Video Sources 01-14-2021, 02:49 PM
Replies: 9
Views: 252
Posted By barry wilkins
Re: SOVOS Flip down TV SVKTV156A

I dont know i,t is right bodge took a lot of getting off.
I spoke to the owner and she said it had never been repaired before ?
As I said before the caps are far too large ,jammed in and glued down...
Forum: Troubleshooting TVs and Video Sources 01-14-2021, 10:37 AM
Replies: 9
Views: 252
Posted By barry wilkins
Re: SOVOS Flip down TV SVKTV156A

Photos 227657

227658
Forum: Troubleshooting TVs and Video Sources 01-14-2021, 10:29 AM
Replies: 9
Views: 252
Posted By barry wilkins
Re: SOVOS Flip down TV SVKTV156A

OK thanks for that
Just run the TV up today after sorting out a few thing its working .
Ordered some much smaller capicitors for the power supply which should finish the repair.
Still cannot...
Forum: General Electronics Technical Discussion 01-14-2021, 10:22 AM
Replies: 11
Views: 593
Posted By barry wilkins
Re: 4017 counter reset problem

Hi think you are right about the transistor ,just knocked up a circuit to try ,a capacitor about 10 uF and a IRFBC30 mosfet (got lts of these) .
The output from the counter is now AC coupled so if...
Forum: Troubleshooting TVs and Video Sources 01-13-2021, 01:36 PM
Replies: 9
Views: 252
Posted By barry wilkins
Re: SOVOS Flip down TV SVKTV156A

Hi where is the go advanced ?
Forum: General Electronics Technical Discussion 01-13-2021, 01:29 PM
Replies: 11
Views: 593
Posted By barry wilkins
Re: 4017 counter reset problem

wont work the switch is binary ,the lamps are controlled by the ecu
Forum: Troubleshooting TVs and Video Sources 01-13-2021, 11:33 AM
Replies: 9
Views: 252
Posted By barry wilkins
SOVOS Flip down TV SVKTV156A

I tried to attach a picture of power supply ,but it will not upload.
I removed a capacitor off a simlar circuit ,it measured 10uF which suprised me .
Pin 2 of the IC seemed to be the supply voltage...
Forum: General Electronics Technical Discussion 01-13-2021, 11:13 AM
Replies: 11
Views: 593
Posted By barry wilkins
Re: 4017 counter reset problem

Here is a picture of my first design227560
Forum: General Electronics Technical Discussion 01-13-2021, 04:17 AM
Replies: 11
Views: 593
Posted By barry wilkins
Re: 4017 counter reset problem

No the alarm is not can bus ,but I expect the hazard lamps are ,as the lights seem to be controlled by an ECU.
What I did think ,if I changed the output to AC coupled it would not matter if the...
Forum: General Electronics Technical Discussion 01-13-2021, 04:11 AM
Replies: 10
Views: 488
Posted By barry wilkins
Re: Load Testing Audio PA Amplifiers

When I was an engineer we had 1000W RF generators ,these actually American radio transmitters.
We had oil filled dummy loads for testing ,but they were 50 ohms.
You can get devices which are...
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