Hobby Electronics Basics

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OT: Barking Dog Problem

Any clever ideas on how to silence a neighbor's barking dog? Ultrasound? ...Jim Thompson -- | James E.Thompson | mens |...
41 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
41 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

Is this circuit going to be a problem?

I want to control a small motor with a sensor (variable resistance). The sensing works fine, but I'm wondering whether...
10 comments posted 10yrs
posted by BobEngelhardt
10 comments posted 10yrs posted by BobEngelhardt

New use for a buggywhip (or a 10Base-T X-former)

...which is darn near as useful as a buggywhip, these days. Got two rails of PCA 1829 10Base-T transformers in DIPs in...
0 comments posted 10yrs
posted by MyNameForward
0 comments posted 10yrs posted by MyNameForward

Looking ahead

I saw this on a forum today. I'm not sure it's as true as it was at one time, but it should be. "I read recently that w...
32 comments posted 10yrs
posted by nojunk
32 comments posted 10yrs posted by nojunk

Motors In Seat/Down Tubes

What can the efficiency of a 200 watt motor + reducer be if it's only 1" in diameter? https://www.yahoo.com/tech/cheat-p...
4 comments posted 10yrs
posted by bretcahill
4 comments posted 10yrs posted by bretcahill

Boat bow and stern thrusters

I would like to put homemade bow and stern thrusters on by 28 foot boat. I plan to buy used trolling motors; cut handle...
5 comments posted 10yrs
posted by rh5680
5 comments posted 10yrs posted by rh5680

sampling rate

Hi, My Bluetooth classic 2.0 wireless data acquisition system is sampling a 10 Hz signal at the rate of 500 samples per...
6 comments posted 10yrs
posted by davebrown227
6 comments posted 10yrs posted by davebrown227

Variac?

Would a variac also serve as an isolation transformer? Newbie wants to know. Ivan Vegvary
15 comments posted 10yrs
posted by ivanvegvary
15 comments posted 10yrs posted by ivanvegvary

"Nuts and Volts" and "Servo" in decline?

Just received the current copies of the above 2 mags. Almost 20 pages shorter than previous issues. Articles are being...
8 comments posted 10yrs
posted by ivanvegvary
8 comments posted 10yrs posted by ivanvegvary

Altria

Although not from a good business source, the story is probably true. Just to add to your knowledge base. http://gizmod...
1 comments posted 10yrs
posted by nojunk
1 comments posted 10yrs posted by nojunk

Z80 trst circuit

Hi, Just thought I'd post my first iterations of the Z80 test circuit. https://youtu.be/WIz5J6fmplo
10 comments posted 10yrs
posted by laguest
10 comments posted 10yrs posted by laguest

MOSFET drain-source voltage drop

I am using a MOSFET driver in a PWM circuit. I am switching 12v (battery) with a Schmitt trigger oscillator on the gate...
30 comments posted 10yrs
posted by BobEngelhardt
30 comments posted 10yrs posted by BobEngelhardt

LTspice: X-Axis Variable

In LTspice, is there a way to change the X-Axis variable? In PSpice I can do a PWL simulation, then change the X-Axis v...
4 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
4 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

Darlington readings

Testing a 2SD711A. B-E reads 0.25v drop in both directions. Normally I?d throw it in the trash but looking at the equiv...
6 comments posted 10yrs
posted by not
6 comments posted 10yrs posted by not