e-licktronic Forum

Hello everyone
Today i received the Yocto kit nothing is missing nothing is broken but the package was crushed in the middle with a little hole and i thing no something is broken but when i open it everything was ok uff maybe maybe in the future you can use strong box or some information on the box handle with care fragile stickers because i was lucky they didn't broke the main board

Thanks thanks for fast delivery e-lictronic

now time to order mouser projekt

hello one the Power Supply part number C3 is electrolytuc capascitor 680/ 35 V on mouser bom what i order is 680 / 25 volts is this ok?

BedroomMusic wrote:the Power Supply part number C3 is electrolytuc capascitor 680/ 35 V on mouser bom what i order is 680 / 25 volts is this ok?

Yes it is

Best regards,
e-licktronic

Hey im getting -0V on the -15V ,+15V is 13,4 V and +5 is ok 4,999V

im using Phihong Wall Mount AC Adapters 15W 15V 1A Level VI

orientation and value of all diodes and electrolytics is oky

any suggestions

You need a supply that outputs AC not DC, then you shall see the -15v.

Been there, done that!

http://www.mouser.com/ds/2/323/PSX15R-553264.pdf - This is the datasheet for the supply you bought (same one as I did), scroll down a little and you'll see that it states DC Output.

You need something like this https://www.esr.co.uk/electronics/produ ... pplies.htm (yes 16V is totally fine), look for the order code "460-255".

With the DC supply you're using you'll receive the 0v/GND +15v and +5v (as this is the +15V stepped down), you will not however receive the -15V as you're aware.

I drew a little diagram below to demonstrate why this is, hopefully it'll help everyone understand.



DC: you get +15v at the top/peak of the cycle

AC: you get +15V at the top/peak of the cycle
however you'll now get -15v at the bottom/trough of the cycle

P.s I don't know how to make the photo smaller

hej Jeremy thank you for quick response and the answer to my problem i buy Ac 15v 1A Oem Ac adaptor and is oky

i can give link to the shop is someone is interesting

http://www.rcs-elektronik.com.pl/index. ... ad-zmienny


now is 15.026
4.998
-14.988 multimeter is Unit UT61E True RMS i measure in dc mode

now is time for noise section and thanks once again Jeremy

Hi when adjusting the trimmer in the noise section
I cannot get 130mV on pin 1 of the 4558 closest I can get is 100mV any suggestions

maybe i will do some modifications from Roland service manual

hello from service manual I've changed r131 to 100k and i put 10uf 35v electrolytic cap in R127 now the noise section is around 130mV but is jumping up and down ii the multimeter fals

How are you measuring the noise? It needs to be in AC mode and measuring V RMS. Scope is preferred..