voltage level handled using optocoupler
37859
Help understanding this schematic : Why is the diode there (AT89C2051 Programmer)?
129016
Optocoupler with phototransistor base lead
127509
reverse function optocoupler
2774
Stepping up 3V to 5V
153385
voltage divider -- for detecting higher voltage in ADC
22580
Control 220V AC line using MCU
82622
Calculating voltage in a simple circuit
123182
Calculate resistors value in voltage divider
127750
Building a voltage transformer circuit for sensing mains voltage
94197
Effect Of Frequency on Photocurrent
28135
Can I use blue-green LEDs as MCU state indicators on 3.3 V power?
42152
Adding DC voltages of PSU
156010
Using a diode to ensure current flows in only one direction, without causing a voltage drop
80503
Holding voltage high, for monostable 555 timer pulse
131698
How can I make a simple voltage-controlled attenuator?
56895
AVR 1.1V Internal ADC Reference Over-Voltage
83572
How to select an LDO voltage regulator?