jwhmca

This meter for EXPAT VU PCB?
« on: September 19, 2012, 05:56:04 PM »
Part No. TR-35

Professional, high Class

dB : -20~+5dB

0dB=1.288V+/-10%, calibalated

DCR= 650Ω, If=450uA

Lamp : White LED x1pcs ,10~20mA (has no resistor inside)

Led Lamp voltage : 2.2~2.6V

So, you need the resistor :270Ω 1/4W ,if VDC=5V

390Ω 1/4W ,if VAC/DC=6.3V

1000Ω 1/2W ,if VAC/DC=12.6V

If so, what resistor for the 3.9K the Expat says is needed?


 

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