User The_Vintage_Collector

10 votes

5 answers

10k views

Does a solenoid valve allow continuous run-time for very long durations?

solenoid-valve

asked Nov 5, 2017 at 15:24

10 votes

4 answers

11k views

Why can an AC circuit breaker not be used in DC circuits?

current ac dc circuit-breaker

asked May 1, 2020 at 21:46

9 votes

5 answers

3k views

Why are bulky SCR power controllers used when the same can be achieved with a relay?

relay solid-state-relay scr

asked Nov 13, 2017 at 19:54

9 votes

3 answers

2k views

Why does a brushed DC motor current draw differ with direction of rotation?

dc dc-motor current-measurement

asked Apr 19, 2021 at 21:45

8 votes

3 answers

5k views

Is it okay to connect a European 240V transformer to a US 240V outlet?

ac transformer

asked Oct 30, 2017 at 17:47

8 votes

3 answers

7k views

Do we need any kind of protection for AC relay coil?

ac diodes relay

asked Nov 10, 2017 at 21:16

6 votes

6 answers

31k views

Does a circuit breaker trip depending on voltage or current?

ac mains circuit-breaker

asked May 3, 2017 at 16:19

5 votes

3 answers

11k views

How is the 220V line in US different from other parts of world? Does a US 220V line need two switches for each wire?

ac

asked Oct 29, 2017 at 20:01

4 votes

1 answer

281 views

Using a vintage button bulb saver be used for CFL or halogen lamps?

incandescent

asked Oct 21, 2017 at 12:37

3 votes

1 answer

155 views

What could be this particular thermometer used for?

thermostat electric

asked Nov 24, 2017 at 19:57

3 votes

1 answer

608 views

Making a bench power supply to test car & bike starter motors at no load?

power-supply motor transformer ups bridge-rectifier

asked Apr 17, 2020 at 23:25

3 votes

1 answer

181 views

How much current is drawn by an 18,600 BTU A/C compressor during free run?

power amperage

asked Jun 29, 2018 at 14:41

2 votes

1 answer

504 views

Can this 1000W ballast be wired for 240V and plugged to 120V to run a 400W MH Lamp?

inductor light ballast

asked Sep 14, 2018 at 19:00

2 votes

1 answer

266 views

How far does reforming a capacitor help? Does it have any adverse effect on using such a capacitor on components?

electrolytic-capacitor dielectric

asked Oct 8, 2018 at 15:55

2 votes

1 answer

192 views

Can de-ionized water be used instead of distilled water to prepare lead acid battery electrolyte?

batteries lead-acid

asked Apr 29, 2020 at 17:02

2 votes

1 answer

112 views

What type of vintage semiconductor device is this? Is it an SCR?

temperature scr thyristor heater

asked Aug 12, 2020 at 19:15

2 votes

1 answer

1k views

How much length of nichrome wire needs to be adjusted to mod a 220V toaster to run on 115V?

ac heat

asked Dec 1, 2017 at 17:32

2 votes

0 answers

40 views

Can the output voltage of this variable frequency drive (VFD) be varied?

power-supply vfd avionics

asked Aug 12 at 6:37

1 vote

1 answer

432 views

How to determine the state of charge of a NiCD battery when charged via a Bench PSU?

power-supply battery-charging nicd-battery

asked Apr 10, 2021 at 20:07

1 vote

1 answer

25 views

Does anyone have a datasheet for the AMS FUA78MG IC?

integrated-circuit

asked Aug 6 at 15:20

1 vote

1 answer

532 views

What type of electronics soldering is this soldering flux used for?

soldering flux

asked Nov 17, 2017 at 17:21

1 vote

4 answers

10k views

What is the use of SENSE + and - in a PSU?

power-supply ac dc

asked Nov 9, 2017 at 20:41

1 vote

1 answer

1k views

How does using a 60Hz device on a 50Hz supply affect it?

ac frequency

asked Oct 26, 2017 at 20:38

1 vote

1 answer

729 views

Is it safe to use a 120V 300W 60Hz UPS in a country with 240V 50HZ after step down with regular 1000W transformer?

ac frequency ups

asked Jun 11, 2017 at 11:25

1 vote

2 answers

4k views

Replacing the selenium rectifier in a vintage car battery charger

battery-charging bridge-rectifier

asked Aug 15, 2017 at 9:09

1 vote

1 answer

428 views

Is this SLA battery still usable?

batteries

asked Sep 5, 2017 at 11:24

1 vote

0 answers

157 views

Need help with identifying the function of 3 wires in camera flash circuit

flash camera

asked Aug 30, 2020 at 20:39

1 vote

0 answers

41 views

Is there a potential earth leakage or is it something else?

ac mains grounding electrical earth

asked Jun 5, 2020 at 21:48

1 vote

1 answer

245 views

What is the right voltage to charge a flooded lead acid at CV? Also it got pretty warm while filling up acid

battery-charging lead-acid

asked Jun 30, 2020 at 15:33

1 vote

1 answer

72 views

Advice on connecting heater directly to SP2 relay of PID controller?

temperature control-system pid-controller heater

asked Feb 20, 2020 at 21:57

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45 Questions

Does a solenoid valve allow continuous run-time for very long durations?

Why can an AC circuit breaker not be used in DC circuits?

Why are bulky SCR power controllers used when the same can be achieved with a relay?

Why does a brushed DC motor current draw differ with direction of rotation?

Is it okay to connect a European 240V transformer to a US 240V outlet?

Do we need any kind of protection for AC relay coil?

Does a circuit breaker trip depending on voltage or current?

How is the 220V line in US different from other parts of world? Does a US 220V line need two switches for each wire?

Using a vintage button bulb saver be used for CFL or halogen lamps?

What could be this particular thermometer used for?

Making a bench power supply to test car & bike starter motors at no load?

How much current is drawn by an 18,600 BTU A/C compressor during free run?

Can this 1000W ballast be wired for 240V and plugged to 120V to run a 400W MH Lamp?

How far does reforming a capacitor help? Does it have any adverse effect on using such a capacitor on components?

Can de-ionized water be used instead of distilled water to prepare lead acid battery electrolyte?

What type of vintage semiconductor device is this? Is it an SCR?

How much length of nichrome wire needs to be adjusted to mod a 220V toaster to run on 115V?

Can the output voltage of this variable frequency drive (VFD) be varied?

How to determine the state of charge of a NiCD battery when charged via a Bench PSU?

Does anyone have a datasheet for the AMS FUA78MG IC?

What type of electronics soldering is this soldering flux used for?

What is the use of SENSE + and - in a PSU?

How does using a 60Hz device on a 50Hz supply affect it?

Is it safe to use a 120V 300W 60Hz UPS in a country with 240V 50HZ after step down with regular 1000W transformer?

Replacing the selenium rectifier in a vintage car battery charger

Is this SLA battery still usable?

Need help with identifying the function of 3 wires in camera flash circuit

Is there a potential earth leakage or is it something else?

What is the right voltage to charge a flooded lead acid at CV? Also it got pretty warm while filling up acid

Advice on connecting heater directly to SP2 relay of PID controller?