Stereo VU Meter is built into a Black Jiffy Box measuring 197 x 113 x 63mm with all holes CNC cut already.
Notes & Errata
1.New Stereo VU kit with LED VU meters only draws about 40mA total so some 12v powers supplies by cause noise or hum under this lite load. Adding 10R in series with the + red & - black power wires coming from the DC connector and a 470uF to 2200uF cap across the DC terminals on the VU2 with RC filter all noise out.
2.New 5v led meters. The 2 x RLAMP resistors = 680R for new 5v LED Lamp meters and 8 x diodes are NOT fitted just 4 wire links as shown.
3.Old 12v lamp meters. The 2 x RLAMP = 10R for old 12v lamp meters and 8 x diodes are fitted.
4.Current VU2 pcb has pin 4 of the IC socket masked over so best to solder a cut off component leg form that pin to -DC as shown below.

Build from the lowest height component to the highest. eg BAT85 diodes, Resistors, IC socket, 1uF caps, 4 pin headers, IDC10 header, 10uF caps, XLRs.
PCB built for new 5v led lamp meters.

47k = Yellow Violet Black red
3k3 = Orange Orange Black Brown
100R = Brown Black Black Black
10R = Brown Black Black Gold (Cream Body)
VU2 Stereo buffer kit parts list here
Fit Female XLRs. Then fit pot so screw to the right from front under PCB as below photo shows.
Fit TLO72 IC so its end notch and pin 1 dot are closet to the XLRs. Trim 4 wire cables to half there length.

Use one off cut red and black wire to wire the +/-DC on the VU2 PCB to the DC connector.

The Stereo IN PCB holds 2 x TRS sockets and a IDC10 header. Note Header is fitted as photo below with opening facing out NOT as Stereo IN PCB overlay shows.
Fit IDC cable between VU2 and Stereo IN PCB. XLR or TRS can be used as inputs. Also you can send in the XLRs and loop out with the TRS sockets.
Wire meters to 4 wire cables as shown and plug them into the VU2 PCB.
Stereo VU Meter is ready to screw together and plug 12v power pack in (meter back lamps should light)
Align meters using rear mounted 25 turn trim pots and a 1kHz tone of +4dBM (1.23vac on multimeter)
Or if you need a different level for your system. Play music and adjust trims for the meter movement you want.
Once movement looks roughly correct send in 1Khz tone and check both meters read the same level. If not adjust one meter to match the other.
Feel free to ask any questions on the Stereo VU meter kit below on this thread
