Humidity-Chicklet
A basic buffered Crossfader chicklet.
Basic Info
- Two inputs (
IN_A
andIN_B
) can be blended via one potentiometer (Fade
) - Tiny Formfactor: 45 x 18.75 mm
- Operates on ±9 to ±15V (if you have no bipolar PSU use a simple railsplitter)
- Optional Level control (replace with fixed resistor if not needed)
Build it
- Depending on the Opamp you may omit
C1
andC2
(they should prevent oscillation) - You should not omit
C3
andC4
- All Resistors except
R6
are 0805 10k – if you only have 100k Potentiometers just use 100k resistors instead - If you don't need the Level Pot bridge the thing with a resistor instead (marked on silkscreen)
BOM
n | Refdes. | MPN | optional |
---|---|---|---|
5 | R1, R2, R3, R4, R5 | 0805 10k | same value as Pots |
1 | R6 | 0805 100R | can be bridged with solder |
2 | C1, C2 | 0603 220pF | anything between 100pF and 470pF should work |
2 | C3, C4 | 0603 100nF | |
2 | FADE, LEVEL | Potentiometer (9mm) | you may omit LEVEL, see silkscreen |
1 | U1 | SOIC-8 Dual Opamp |