DrMoishe Pippik's user avatar
DrMoishe Pippik's user avatar
DrMoishe Pippik's user avatar
DrMoishe Pippik
  • Member for 5 years, 7 months
  • Last seen this week
15 votes

PCB Trace Repair (Need to keep track shape?)

13 votes

Why are some capacitors bent on old boards?

12 votes

MOSFETs turn on without any voltage applied to the gate

7 votes

Meaning of resistor power rating

6 votes
Accepted

Connecting different Ah lead acid batteries in series

6 votes
Accepted

Power indicator LED for 230VAC light circuit

6 votes
Accepted

Need help identifying replacement components on PCB

6 votes

How does this circuit in an electric mosquito swatter work?

5 votes
Accepted

How can a battery get reverse charged? (other than by being charged backwards)

5 votes

Can I use a 2.4 GHz antenna for 900 MHz signal?

5 votes

Can you safely connect the LED side of an optocoupler to AC Mains(120v)?

5 votes

NPN transistor seems on even though base is grounded with resistor

5 votes

How can a failed furnace blower motor damage other equipment on a shared neutral?

5 votes

Is full wave rectified AC, without a smoothing capacitor, okay for switching a DC solenoid and a DC relay?

4 votes
Accepted

Does anyone know what the nitrogen gas on this telephone pole is for?

4 votes
Accepted

What is the result of wiring an electrolytic cap in series with a ceramic when parallel was intended?

4 votes

What is the meaning of "longer electrical length = more wavelengths"?

4 votes

Rectify 220v ac to 220v dc using mechanical system

4 votes

Battery draining faster than predicted based on measured current draw

3 votes

Do factory calibrated electronic compasses need to be re-calibrated in the field?

3 votes

Temperature sensor on a long wire (100ft)

3 votes
Accepted

Is it normal for the OC2 vacuum tubes to glow bright orange during operation & OA2 to flicker while running?

3 votes
Accepted

Ethernet transformer saturation at low frequencies

3 votes

Why there is no brushless field wound DC motor

3 votes

-12v supply from +12v

3 votes

How to check whether a byte of 8 bits contains 1, assembler 8051?

3 votes

Pre-amplifier input protection

3 votes

Creating higher voltage from DC motor?

3 votes
Accepted

Trying to attach resistor to MacBook logic board (a1278, 820-3115-b)

3 votes
Accepted

How do you make an antenna with length much greater than the wavelength work?

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