Tagged Questions

1
vote
2answers
134 views

Problems when sharing a battery between motors and radio in an RC car

Background I am building an RC Car that I am trying to modify to control from an Android phone. When I connect the remote control module as well as the car circuitry (servo & motor) to separate ...
4
votes
1answer
127 views

How to protect an electronic construction kit (a toy) from damages?

As I child, I had this electronic construction kit called Elektronik 1. It was manufectured in former Czechoslovakia, based on resistors, diodes, bjt transistors, capacitors, an LW+SW radio antenna ...
5
votes
1answer
138 views

Minimum diode current / realtime clock battery backup

I know there is a minimum forward voltage for diodes, however, is there a similar property for current? I'm trying to use something like a BAT54C as a steering diode such that a 3V lithium battery ...
0
votes
4answers
911 views

Why can't we use diodes in place of batteries?

1.why we cant use diodes in place of battery?we are getting 1.4v in a cheaper cost than battery.but why we dont use? 2.if electrons are moving in a single direction it releases many energies but why ...
2
votes
2answers
103 views

Device is reset when switching power sources

I use a home weather station. It is powered by two AA batteries (2 x 1.5 = 3.0 V nominal). The problem is that it eats more than 1 mA and that is quite a lot of power and I must buy a new pair of AA ...
1
vote
2answers
641 views

Can I drop 4.5 V to 3.7 V with a diode?

I have an RC helicopter with a dead 250 mAh lipoly battery with a voltage of 3.7 V. Could I use 3 button cells at 4.5 V and a diode with 0.7 voltage drop to power the circuit, which is somewhat ...