Hobby Electronics Basics

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Serial programmers?

I was just wondering how serial programmers work, i.e. we need two lines, one for clock, and one for data. Which serial...
8 comments posted 21yrs
posted by lessie__
8 comments posted 21yrs posted by lessie__

Pic design question

I was just wondering why the pic16f676 (and most others) use bank0 and bank1 to access registers. Would it be such an o...
10 comments posted 21yrs
posted by cathrynse
10 comments posted 21yrs posted by cathrynse

Substituting a 74HCT74 for a 4013

Can someone tell me how I could use a 74HCT74 in place of the 4013 in this circuit... http://www.uoguelph.ca/~antoon/ga...
6 comments posted 21yrs
posted by 1qazse4
6 comments posted 21yrs posted by 1qazse4

Thanks for the help!

Just thought the folks who helped me out in this group might be interested to know that (I think :-) I'm finally finish...
3 comments posted 21yrs
posted by tom.horsley
3 comments posted 21yrs posted by tom.horsley

Power Supply capable of shocking soil

Hi, I'm working on a biology project at my high school. I'm raising worms in a small tank of dirt (about 1.5 feet long...
8 comments posted 21yrs
posted by sbben
8 comments posted 21yrs posted by sbben

The ultimate clock-problem (74LS42)

Greetings I have a small assembly consisting of a 74LS192 (BCD-counter), 74LS42 (BCD-to-decimal decoder) and a 74LS02 (...
14 comments posted 21yrs
posted by bos
14 comments posted 21yrs posted by bos

RF power

Hi, Could someone explane me some basic issues of power tranfer in RF amplifier stages. 1. How power is transferred fro...
4 comments posted 21yrs
posted by mzypt1
4 comments posted 21yrs posted by mzypt1

Wireless MIDI device

I've been gearing up to take on a new hobby project, building a wireless MIDI controller. I've done a fair bit of resea...
0 comments posted 21yrs
posted by aprogrammer
0 comments posted 21yrs posted by aprogrammer

A control problem

Hi I am having trouble working out a solution to a control problem. What I have is four (4) inputs needing to control s...
11 comments posted 21yrs
posted by rolla_jarhead
11 comments posted 21yrs posted by rolla_jarhead

ISDN phone lines

Does an ISDN line function as both a POTS and ISDN line. (yes--stupid?) The system detects the difference and switches...
10 comments posted 21yrs
posted by newszz10
10 comments posted 21yrs posted by newszz10

Why the strange pinouts?

Why is it that some chips just don't seem to have any logic to their pinouts. For example, why do they split up ports o...
5 comments posted 21yrs
posted by gashmore
5 comments posted 21yrs posted by gashmore

Capacitor for xenon circuit

I buld some flash wanrming, just a small power ,but i don't know how to indentify the kind of electrolytic capacitor th...
2 comments posted 21yrs
posted by mowhoong
2 comments posted 21yrs posted by mowhoong