Can I use a 5v xtal osc with a 3v MCU? Will a simple npn buffer work?
113660
Convert Oscillator output voltage level
64282
How to interface a SPST switch with minimal current (1µA)?
119852
NOR Gate is Working Correctly with Vcc Pin Disconnected
35288
Cat 5/6 in same conduit as power: is NM-B required, or is THHN acceptable?
28135
Can I use blue-green LEDs as MCU state indicators on 3.3 V power?
114322
Making voltmeter accepting bipolar input voltage, using a microcontroller
90686
Kelvin Source Terminal on MOSFETs
151190
Line level voltage to drive LED display
40435
Is it safe to connect two MCU pins directly to each other?
132872
How to retrieve current wattage info on OS X?
34160
Is there any bidirectional 5v-3.3v level shifter?
129553
5V to 3.3V Level shifting circuit
22729
Level shifting a +/- 2.5V signal to 0 - 5V
49285
Is my MOSFET-based bidirectional level shifter insane?
28361
How can I drive 12v LEDs from my Arduino Nano?
7084
ADC for measuring 0-5V but connected to 3.3V device
156961
Crystal load capacitance for low power applications