Tagged Questions

1
vote
1answer
177 views

Estimate Current Requirements Of A Circuit

So far with all my electronics circuits I have been using a DC wallwart so didn't have to think much about the current requirements of my circuits. Now I have a prototype that I would like to run ...
4
votes
2answers
2k views

Driving 10x10 LED matrix with AVR?

I'm in the process of designing a controller PCB for a 10x10 white LED matrix clock (inspired by the tutorial here). It's based off an ATmega328 AVR IC and Maxim DS3234 SPI RTC. However, I'm stuck: I ...
3
votes
2answers
514 views

Hot ENC28J60 @ 132 mW

I have a problem with a relatively simple board which consists of an ENC28J60 Ethernet controller and an ATmega168. The circuit around the ENC28J60 is straight out of the datasheet and I have the ...
5
votes
2answers
698 views

How to redesign a circuit to use a current sinking IC rather than a current sourcing IC

I'm building a serial servo controller to learn about electronics and assembly language as part of my hexapod robot project. Quite early on I decided that I needed more I/O channels than my ATTiny2313 ...