Electronic Workbench Software?

10:10

Expert Member
Joined
Oct 9, 2022
Messages
1,696
Reaction score
830
Location
Ogies Mpumalanga
Hi, if anyone knows of a good one, I don't mind paying for software it is just I am not going to pay subscriptions. I will rather spend the money on parts and blow them up until I can get something that works.

So if anyone knows of a good one that works on PC or Android, please it will help a lot.
 
Yea I guess since everyone is money crazy and good resources can't be found anymore I will just have to take a taxi down town and see if I can find anyone that sells parts. Lost my car, it is hard to be without one.
 
Not sure which features you need exactly but look at
 
image_2023-05-16_144550472.png
I wanted to see if this works or not. It is suppose to be able to alert a person if the battery goes below 12V. I have a lot of battery lights that use 12V batteries but I normally leave them on for to long and the battery gets damage. I don't care for the Piezo Buzzer but the light is important. I got it from a YouTube.

I modified the Zener Diode to 12V so that when the battery discharge from 13.5V to 12V that it should give an indication. so if anyone that actually knows electronics can tell me if this will work or not that be great.
 
Can't see how that circuit will work detecting if greater or less than 12V

You are better off using a resistor divider to turn on/off a transistor, or better still use a comparitor for better accuracy.
 
1684250161872.png

Something like this should work with a comparitor.
Voltage on U1 pin 3 will always be 5.6V (Unless battery is totally dead)
Setup battery for 12V and adjust RV1 pot until U1 pin 1 is just below 5.6V. This will then output a low on pin 4 and turn on the LED.
With the battery then above 12V (ie > 5.6V on pin 1) this will cause a high on pin 4, turning off the LED.

Of course you could go completely overboard with a ESP8266 and use a analog pin to monitor the voltage. When it drops get the ESP to send you a telegram notification :)
 
You could try a very simple TL431 type circuit like this. A 1K resistor for R3 should give a cutoff signal at around 12V. The parts cost for this would be very low - < R10-00. A TO92 TL431 costs around R4-00. This circuit draws around 5mA of power but could be reduced using a TLV431 etc.

Under_Voltage_Light.jpg
 
You could try a very simple TL431 type circuit like this. A 1K resistor for R3 should give a cutoff signal at around 12V. The parts cost for this would be very low - < R10-00. A TO92 TL431 costs around R4-00. This circuit draws around 5mA of power but could be reduced using a TLV431 etc.

View attachment 1525555
This is great for some applications, can you do the same but instead of illuminating an LED it disconnects the load at 12V?
 
This is great for some applications, can you do the same but instead of illuminating an LED it disconnects the load at 12V?

Yes you can. Here are a few other variations of the same circuit. The value of R2 needs to be changed according to the cutoff voltage required. I think 10K should work for a 12V cutoff voltage (R2/(R2+R3)*Vcutoff = 2.5V). The turn-on voltage of the TL431 is internally set at 2.5V and Vcutoff is the battery turn-off voltage that you require.

 

Attachments

  • Under Voltage Protection Circuit..PNG
    Under Voltage Protection Circuit..PNG
    18.3 KB · Views: 8
Top
Sign up to the MyBroadband newsletter
X