VIM Voltage Injecting Mixer
The voltage injecting mixer is a compact fully DC coupled two channel mixer module with the possibility to inject an +/- 8V offset on the incoming voltages.
Channel one has an attenuverter circuit which allows to invert or attenuate the incoming signal. The Attenuverters maximum gain can be set with a resistor on the board (Gain +/- 1 or +/- 2).
Channel two is fed right away into the summing circuit of the module.
If there are no signals connected at the channel inputs the module simply acts as an offset voltage generator.
The final output voltage is displayed by the backlit syringe on the frontpanel. Red indicates positive voltages, green indicates negative voltages.
- ATV (sets the gain of Channel 1)
- OFFSET (adds offset to the outgoing signal)
- IN is the input jack for channel one
- IN2 is the input jack for channel two
- OUT is the summed output of IN, IN2 and the OFFSET voltage
- +12V 5mA / -12V 5mA
- Width: 4 HP (20mm)
- Depth: 13mm
Check it out in the shop: VIM Kit – Voltage Injecting Mixer
Download the workshop documentation with explanations, schematics and pick and place infos:
BOM TL074 U1 1.00 Mouser 511-TL074ACDT SO14 / 595-TL074CPWR TSSOP14 Resistor R8, R9 2.00 2k2 ? Resistor R5, R7 2.00 10k ? Resistor R1, R2, R3, R4, R6, R10, R11, R12, R13 9.00 100k ? Pinhead 10Pole PWR 1.00 Farnell 1593451 Inductor PSU 100nH L1, L2 2.00 100nH Mouser NLCV32T-R10M-PFR Phonejack IN, IN2, OUT 3.00 Qinpu Electronics LED D1, D2 2.00 Mouser 1716696 old part 859-LTW-420D7 Capacitor 0805 C3, C4 2.00 CAP PSU C1, C2 2.00 22uF Mouser 667-EEE-FK1C220R Pot Stereo 50k lin ATV, OFFSET 2.00 50k lin Alpha Taiwan Electronics