- Joined Feb 27, 2018
Hi guys, I am implementing an amplifier(attachment1) on a breadboard first to test out the sound quality distortion etc. I have attached the circuit . I have question about where to connect power and how it is referenced. I attached a second picture and it is circled. What does it mean when it says -18V and -25V referenced to the -30V line. -25V is coming out a regulator, that doesnt make sense to me bc i thought only positive voltages can come out of a regulator. If i understand the schematic correctly, the +30V wire from PSU goes to +30 and -30V goes to the -30V on the schematic and the ground from PSU goes to the GND on the schematic.
How many power supplies do I need to implement this on a breadboard. I used +30V and -30V for the main power(This is a 3Amp max power supply, do i need more current?) and also +5 and -5V for the 555. But no sound came out. so should i also get a different power supply to provide the -18V and -25V.?
I have attached the power part of the circuit(attachment 2) and there are 3 things circled, could any of you explain this part. I am super confused.
Any Help is greatly appreciated.