Latest threads in Hobby Electronics Basicsshow only best voted threads
| Subject | Author | Posted | Replies | |
|---|---|---|---|---|
|
|
OT: googlegroups Crosspost check
Just checking - some googler was multi-posting, I want to show him how simple it is to crosspost. All you have to do is put the list of crossposted groups in the "To Newsgroups" block, comma-separated...
1
|
15 years ago
|
1 | |
|
|
8 Bit Random Numbers
I located a program to generate 255 pseudo-random numbers in some fixed sequence which repeats after 255 counts. 4 bits of the random register (bits 3,4,5,7) are used as feedback to determine the next...
62
|
15 years ago
|
62 | |
|
|
Help with Electric Motor
Hi, I'm in the UK and need some help & pointers on a motor replacement. I have my mother-in-laws roller shutter garage door in bits as the control board burnt. I've made a remote control / relay unit...
10
|
15 years ago
|
10 | |
|
|
What passes as Pulse Width Modulation in DC Motor Control?
Can anyone please tell me what passes as PWM in Motor Control? Is it limited to supplying the motor with a square wave, where a set and constant level of voltage is switched on or off to the motor? Or...
72
|
15 years ago
|
72 | |
|
|
Kits available for making female connectors for PCB headers?
I did a Google search for this, but I must be using the wrong terms... I prefer to use connectors on my circuit boards vs. soldering wires directly. I take apart a fair amount of scrapped electronics,...
9
|
15 years ago
|
9 | |
|
|
CMOS switch - DC blocking cap necessary?
Hey all; I'm thinking of using a switch like this one which has can either be operated using a dual or single power supply. If I were to use it with a single supply, I'd bias the inputs at half of the...
3
|
15 years ago
|
3 | |
|
|
Help on RF amp please
Hi, I have been working on an RFID project that uses a power booster from a Melexis cookbook. Warning it is a 1MByte download. I also posted the schematic on abse. The booster is on page 5. I would...
2
|
15 years ago
|
2 | |
|
|
Using a Transformer on 220 v Appliance
I've got a girlfriend in the Philippines who wants this fancy Kitchenaid Mixer that cost a fortune. They hae 220 over there but these mixers if I buy here are much cheaper. Its that the cheaper ones...
10
|
15 years ago
|
10 | |
|
|
Measuring variation in inductance
I was wondering what precautions I should take for measuring a coil's inductance. Following some capacitive sensing approaches my idea was to use a MCU pin for pulling a pin connected to the coil L1...
3
|
15 years ago
|
3 | |
|
|
How to make a remote control detonator
I need to make a remote control detonator . Anybody could give me schematics that work?
10
|
15 years ago
|
10 | |
|
|
RTD temperature equations
Morning I am looking for equations that solve for temperature in terms of RTD resistance. I find lots of references to equations that only include the lower order terms or that solve for resistance. I...
6
|
15 years ago
|
6 | |
|
|
boiling off electrons
I don't know much about vacuum tubes, but often I have read statements like "the cathode heats up, causing electrons to boil off and fly to the anode".. which makes me scratch my head.. How does an...
27
|
15 years ago
|
27 | |
|
|
Traffic Light Spoofer for Cyclists
I pull up in the left hand turn lane and the traffic light doesn't respond. If only I had a 9 volt battery powered spoofer that would trick the intersection into changing the light! This might require...
31
|
15 years ago
|
31 | |
|
|
Need AC/DC 120v to 12v dc power supply with a ground wire available
I need a cost effective solution for a 12 volt fixed DC power supply for a project I am working on which requires the use of a three prong plug so I have Access to the ground wire. Maximum current...
3
|
15 years ago
|
3 | |
|
|
Trouble simulating a Wein Bridge Oscillator in LTspice
I'm trying to simulate a Wein Bridge Oscillator in LTspice (I'm new to it), and haven't managed to get it to work. I've simulated a few other oscillators without any problems, but for some reason this...
3
|
15 years ago
|
3 |