Hello everyone, I'm not here often but when I need help this place is awesome, you guys are incredible.
Anyhow, I need two voltages from +5V source but one is variable. I need to switch(spdt) from +5V down to ~200mv, so I figure with a voltage divider, 2k2 and 85ohms should give me about 200mv. Next from the +5V, I need to go to 1.21V down to ~300mv with a pot, I can get that 1.21V from another voltage divider 5k6 and 1k8, but how can I vary down to ~300mv ?? I'm stumped, any help much appreciated, thank you in advance.
Anyhow, I need two voltages from +5V source but one is variable. I need to switch(spdt) from +5V down to ~200mv, so I figure with a voltage divider, 2k2 and 85ohms should give me about 200mv. Next from the +5V, I need to go to 1.21V down to ~300mv with a pot, I can get that 1.21V from another voltage divider 5k6 and 1k8, but how can I vary down to ~300mv ?? I'm stumped, any help much appreciated, thank you in advance.