ain_4
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ain_4 [2016/08/10 18:41] – [Versions] latigid_on | ain_4 [2016/08/14 09:45] – [Schematic] latigid_on | ||
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The circuit is a very simple series of two inverting amplifiers per channel. The first is a TL072 powered from +12/-12V, while the second is an MCP6002 powered from 3v3/0V (ground). It's possible to preset the ranges (see below) but it's probably more useful to use the associated [[Control Board]]. | The circuit is a very simple series of two inverting amplifiers per channel. The first is a TL072 powered from +12/-12V, while the second is an MCP6002 powered from 3v3/0V (ground). It's possible to preset the ranges (see below) but it's probably more useful to use the associated [[Control Board]]. | ||
- | For bipolar operation, a +5V reference may be switched in. The output of the first stage is interrupted by a pot in order to attenuate the signal. The second stage has variable | + | For bipolar operation, a +5V reference may be switched in. The output of the first stage is interrupted by a pot in order to attenuate the signal. The second stage has switchable |
+ | |||
+ | Note the gain calculation, | ||
---- | ---- | ||
- | ===== BOM V1.2 ===== | + | ===== BOM v1.2 ===== |
^Type | ^Type | ||
^resistors^ | ^resistors^ | ||
- | | | + | | |
- | | | + | | |
^capacitors^ | ^capacitors^ | ||
- | | |4|10p|025X050|C1, | + | | |4|10p|025X050|C1, |
| |9|100n|025X050|C10, | | |9|100n|025X050|C10, | ||
| |3|10u|electrolytic 2,5-6|C9, C11, C19|remove 1 if powering from Core| | | |3|10u|electrolytic 2,5-6|C9, C11, C19|remove 1 if powering from Core| | ||
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* four 10p as marked in pink | * four 10p as marked in pink | ||
* electrolytics in yellow | * electrolytics in yellow | ||
- | * blue are optional | + | * blue are optional |
* remainder are 100n. | * remainder are 100n. | ||
{{: | {{: | ||
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* with a 100k pot facing you, solder the left leg to 0V(ground) | * with a 100k pot facing you, solder the left leg to 0V(ground) | ||
+ | * with the pot turned anticlockwise, | ||
* centre to WIPER | * centre to WIPER | ||
* right to LEG | * right to LEG |
ain_4.txt · Last modified: 2016/08/18 09:36 by latigid_on