Search found 604 matches

by Joseph
Tue Jul 09, 2019 8:26 pm
Forum: General Discussion
Topic: The honorable relay vs technology
Replies: 8
Views: 309

Re: The honorable relay vs technology

I control the compressor of my window A/C externally to get better results than stock performance. But I have to attend to it or the evaporator will ice up. Once I fell asleep and the ice on the evaporator got thick and stopped the fan. It was straining and overheating when I woke up.
by Joseph
Wed Jul 03, 2019 7:44 am
Forum: General Discussion
Topic: The honorable relay vs technology
Replies: 8
Views: 309

Re: The honorable relay vs technology

Oh that was a bummer how only cycling the power to the unit couldn't turn it on and off. I'm glad the ones I have can be turned on/off remotely by means of the AC going to the power cord.
by Joseph
Thu Jun 20, 2019 10:37 am
Forum: General Discussion
Topic: I found a doohicky thingie
Replies: 6
Views: 609

Re: I found a doohicky thingie

Would there be a transmitter too .. I had some garden watering timers for drip irrigation that I tried to repurpose but forget at the moment what I tried to do.
by Joseph
Thu Jun 20, 2019 10:28 am
Forum: General Discussion
Topic: magnetic amplifier battery charger circuit or...
Replies: 4
Views: 803

Re: magnetic amplifier battery charger circuit or...

I'm leaning back toward an idea I had earlier, maybe as more an experiment than anything. I got a variac that I couldn't use inside my place here because it had a strange defect of outgassing something very toxic feeling. But I could set it under the car hood for charging. Well, I'm thinking of open...
by Joseph
Wed Jun 19, 2019 10:09 pm
Forum: General Discussion
Topic: Crazy Phone issues here..
Replies: 16
Views: 1610

Re: Crazy Phone issues here..

When I and my brothers and sister were kids we found some dumped wire. It was strange because the conductors seemingly were stranded steel. Maybe one conductor out of eight was nickel or something. That was about 50yr ago.
by Joseph
Tue Jun 18, 2019 5:01 pm
Forum: General Discussion
Topic: magnetic amplifier battery charger circuit or...
Replies: 4
Views: 803

Re: magnetic amplifier battery charger circuit

Regulators use amplifier circuits. I moved away from using the magnetic amplifier approach after checking into it and finding out that dynamic range is limited, especially tending to lack ability to have an idle output. The type of regulator makes a difference for providing qualities like stable out...
by Joseph
Sat Jun 15, 2019 12:54 pm
Forum: General Discussion
Topic: magnetic amplifier battery charger circuit or...
Replies: 4
Views: 803

Re: mag amp battery charger circuit

The way the design is so far, it has two transformers using half wave rectification, out of phase, to supply full wave charging voltage. It's more like a quasi magnetic amplifier. However, I'm also now leaning toward not really having it be a magnetic amplifier circuit but using a transformer with a...
by Joseph
Sun Jun 09, 2019 1:40 am
Forum: General Discussion
Topic: magnetic amplifier battery charger circuit or...
Replies: 4
Views: 803

magnetic amplifier battery charger circuit or...

I'm thinking of making a magnetic amplifier based battery charger. I have various 60Hz transformers that might be incorporated into it. I had ordered some pre-made chargers from China, but they never came, which I blame on the trade war.
by Joseph
Sun Apr 21, 2019 8:13 am
Forum: General Discussion
Topic: ok,, New Project time,,,
Replies: 31
Views: 4365

Re: ok,, New Project time,,,

I think I'd use a manual lookup table by reading a voltmeter and then seeing the corresponding figure on a chart. I pretty much did that when I used to measure outdoor temperature before digital thermometers became lower cost.
by Joseph
Fri Apr 19, 2019 5:18 am
Forum: General Discussion
Topic: Soldering iron tip woes
Replies: 11
Views: 1245

Re: Soldering iron tip woes

I used to have a low power iron that I would slip into a layered foil sleeve to make it hot. That gave me the idea the of opposite of clipping a temperature controlled one onto a heatsink that can dissipate more than the maximum output of the heater.
by Joseph
Thu Apr 18, 2019 10:29 am
Forum: General Discussion
Topic: Having a problem with a triac
Replies: 10
Views: 1107

Re: Having a problem with a triac

That's similar to what I put in a circuit when repairing an antique SCR based vehicle battery charger.
by Joseph
Thu Apr 18, 2019 10:25 am
Forum: General Discussion
Topic: Soldering iron tip woes
Replies: 11
Views: 1245

Re: Soldering iron tip woes

Howabout switching in or out a power resistor
by Joseph
Mon Apr 15, 2019 8:01 am
Forum: General Discussion
Topic: Soldering iron tip woes
Replies: 11
Views: 1245

Re: Soldering iron tip woes

The idle switch inserts or removes a diode rectifier in series with the heating element. I think that it cuts the AC voltage going to the heater in half.
by Joseph
Mon Apr 15, 2019 7:53 am
Forum: General Discussion
Topic: What kind of dye is this?
Replies: 5
Views: 817

Re: What kind of dye is this?

An idea I have is that It's paint pigments that match what car manufacturers use.
by Joseph
Tue Apr 09, 2019 10:11 am
Forum: General Discussion
Topic: Soldering iron tip woes
Replies: 11
Views: 1245

Re: Soldering iron tip woes

I can't knock that since my soldering irons have been those low cost ones with the tip held in by set screws. My tips are 6 gauge copper wire. When the tips get deeply pitted I can cut new ends onto them.