Tagged Questions

2
votes
2answers
61 views

CD74HC125E, resistor or not resistor?

I have here an interesting piece of hardware, a CD74HC125E that someone gave me. This chip (can I call this an IC ?) is able to set its outputs to high voltage, low voltage or high impedance. Do I ...
4
votes
4answers
270 views

Is current the same coming out of an IC as it was going in?

This is my first diagram so keep that in mind. I've come up with this circuit because I've got some 74** series ICs and I want to be able to make them work. This example is a simple AND gate with ...
0
votes
1answer
666 views

TLC 5940 PWM driver blank input and pull-up resistor

I've read some of the data sheet for the TLC 5940 and it states the following about the BLANK input: Blank all outputs. When BLANK = H, all OUTn outputs are forced OFF. GS counter is also reset. ...
1
vote
1answer
70 views

Modifying an old phone to draw less power?

I have a phone that I would like to install in my car as a GPS tracker, using the following guide: http://gizmodo.com/5691724/how-to-track-your-vehicle-on-the-cheap I'd like to keep it hardwired to ...
3
votes
1answer
352 views

Can I connect ICs directly together

This is probably answered elsewhere but I can't seem to find it. I have a circuit which uses a Mega8 to drive a couple of ICs as shown in the diagram below. The ISP connectors in the diagram are: ...
0
votes
1answer
333 views

how to choose the transistor for following case?

I planned to use the following circuit to run unipolar motor. I got this circuit by surfing internet. I know how to choose the transistor for driver circuit by knowing the base current, but in this ...
0
votes
1answer
146 views

How to properly store components efficiently and effectively [duplicate]

Possible Duplicate: What's the best way to store and categorise resistors/capacitors/ICs/etc? I have MANY resistors and many other components as well and currently I am using a very ...