Aquaboy dlx + road rage question

[Eddy]

hi

this is my first post here on this wonderful forum.

I've built Aquaboy dlx (with mn3008+ mn3101) and powered it with road rage (with LT1054). the output of Road rage gives +15V, but when i connect it to Aquaboy it falls to +14V. My power supply is +9v 1000A. I also tried conncting 12V power supply and the output of Road rage connected to Aquaboy was as it should +15V. So I wonder what did i do wrong and why my 9v power supply with Road rage doesnt give 15V output!?

Has anyone encountered such problem???

Many thanks!
Ed

[gitaar0]

Hi Eddy,

I have encountered that same problem. Search for my post on this. In the end it was solved with the right combination of the regulator and other components. I forgot what worked for me, but it is in a post. Best is to put this on the breadboard.

Best, marc

[Eddy]

thnx for your reply!

I've got the same combination of LM78L15 + LT1054 + 1N5817diodes as you mentioned in your post. And still with 9v (1000A) power supply connected to Roadrage+AquaboyDLX the voltage falls to 14V, but when I connect 12V (1000A) power it's 15V.

Ed

[gitaar0]

I know. I had the same thing, till I found the combo that worked. Apparently the ABDlX draws more current then the roadrage is happy with with certain regulators.....at least that was my conclusion.
Keep trying?

[Scruffie]

Are you using R52 or R58?

[Eddy]

Are you using R52 or R58?

only r58 is a jumper on my build...

[Scruffie]

Are you using R52 or R58?

only r58 is a jumper on my build...

Try shorting R52 and see how you get on.