I need a schematic diagram for variable regulated power supply 0-150
VDC and 2A
thanks,
Some values are left as TBD. If you like the idea, I'll help you work out
the values.
I'll break it into 3 parts.
Part 1: You need some small fixed voltage supply to runt the control
electronics from. This is just a bridge and a transformer. The only
special requirements are that it makes enough 5V as Vcc to run the
electronics and has a connection to the transformer secondary brought out
as a signal I'll call "CROSS"
You will also need on/off switches and a pot to set the voltage with. The
POT can simply use the Vcc as a reference.
Part 2 the controller ascii art:
Vcc Vcc
! Vcc !
O 1N5304 ! -----
--- ----- ---!THR !
10K ! ! ! ! ! Q!--/\/\--!!--A
Cross -/\/\--+-+-------------! !----+---!TRG !
! FB-----! ! ----- CMOS-555
O POT----! ! !
--- 1N5304 ----- PIC GND
! !
GND GND
Part 3 the power section:
220VAC
-------------------------
!
V SCR
---
/ ! 10R
A----- --- +-----/\/\--------+-----+---- Vout
)!!( ! ! !
)!!( ! --- \
GND--- ------- --- /
! \
GND !
+-- Vfb
!
\
/
\
!
GND