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Nichicons installed (48 secs and £4). The kenwood KA36 lives and breathes (1.5 lungs only at moment.).
Mic Input gives new lease of life for duff hacked childs toy microphone. Kids and distant neighbours receive an early morning boost.
Currently listening to Magma C1971. Awesome musicianship...
1. NE555 Pulse Generator and PWM adjustable circuit.
D1, D2 : 1N4148.
Clock, t = 0.69((R1+VR1)*C1)+0.69((VR1+R2)*C1)
Pwm, Hi duty = 0.69((R1+VR1(①②))*C1)
Pwm, Lo duty = 0.69((VR1(②③)+R2)*C1)
The Circuit.
2. NE555 Variable Frequency Square Wave Generator.
If you only using square wave...
add me to the 555 Junkie list.
OMG the kids are gonna love it!
My turn my turn my turn.
peeeeeeeeoowwwweeehhhhhhohhhhhschlup
One things leads to another - this is especially true in electronics.
Inspired by Homer L Davidson who used a LM3909. Tragically I had to think on my feet due to it being discontinued. Homer used an ugly 90's plastic case for his - the wife was just as unimpressed with my effort...
This may seem a bit cryptic at the moment, but all will be revealed in a couple of weeks. :D
If you had a choice, which would you pick - high or low?
Leave your answer as a comment below.
Many thanks for your help.
Sparky
So the amp needs a proper box and I have a penchant for hoarding scrap with a view to repurposing.
Title of this post has great meaning for me.
I like a pun. At the moment you can buy a 2nd hand looking new guitar (Road Worn)from the likes of Fender. All they do is scrape the paint a bit...
Just posted my ultimate bread board in Projects. It all works and I'm very happy despite a few errors in fabrication. The LEDs don't all power off at the same speed which is annoying - I guess a little bit of maths may be involved and I will need to get the resistor values right.
One thing I...
Hi, this is my first ever blog and no doubt the contents will be full of first ever projects.
Please bear in mind I'm a beginner in electronics, have pudgy work hardened hands, two energetic young children that and a whole load of household chores competing for my attention.
I was never happy...
Sorry guys. :p
All will be revealed in a couple of months.
^-- confirms
http://chemglobe.org/ptoe/_/18.php
http://chemglobe.org/ptoe/_/2.php
Argon comp on RHS.
Okay a little rant....
We have a design exercise to do in uni - it is a PIC based counting circuit, which counts the number of objects passing between a light source and an LDR on a conveyor belt. We were told that there should be a circuit built from op amps to convert the analogue signal...
The experiment was a success, at least I know it worked on holes down to 1mm. I dont know about smaller holes because I cant see inside them so therefore I will electrically test those soon. But the bigger holes had a nice layer of copper in them which is fantastic. TO proove that it was copper...
Here's a Bubba oscillator that uses diodes to give a soft limit to control the amplitude of the oscillator and provide low distortion (better than a half percent at Vout in simulation). I also modified the circuit so that the left capacitor is in the feedback of the inverting stage and thus...
2 sets and 4 kinds ±5~15V fixed dual power supplies.
This is a two separated fixed positive and negative dual power supplies : this power has been used for over 18 years (before 1995)
Regulator IC : 7815, 7915, 712, 7912, 7809, 7909, 7805,7905.
Vout +15V, +12V, 10V, +9V, 0V, -9V, -10V, -12V...
The Transistor's Sink And Source.
If you want to know some more, google:
The Transistor's Sink And Source.
using transistor as switch.
using npn transistor as switch.
using pnp transistor as switch.
operational amplifiers tutorials.
A couple of weeks ago, I volunteered for a undergraduate teaching assistant position for an introductory course on microcontrollers and embedded systems for sophomores. It was an unpaid position and required me to dedicate 4-5 hours a week for labs. My application was accepted and I have been...
A thread was started in the Off-Topic forum the day before I was to undergo gastric bypass surgery and the following was my response to it. I'm putting this an subsequent follow-ups in a blog since that just seem a reasonable thing to do.
My response to the thread:
It's interesting that...
Third year at engineering, awesome girlfriend, new spanking website and possible through hole plating!
My website has be redesigned with the help of my girlfriend who has been helping me with the wordings and style. Ok I lie, she pretty much did everything I just coded the darn thing. It...
