Hobby Electronics Basics

Erratic sinewave signal generator?

I have a Novatech 2901A 32Mhz synthesizer that increments in steps of 1Khz with digital readout from 200Khz to 32Megs....

4 comments posted 12yrs

posted by bperryb

4 comments posted 12yrs posted by bperryb

Hendershot Generator

I've received an ad for plans for a Hendershot generator, claiming that it will produce power sufficient to run an enti...

6 comments posted 12yrs

posted by GM Forsythe

6 comments posted 12yrs posted by GM Forsythe

Reading the intensity of an IR Led using a PNA4601M IR Receiver

Hello, I'm trying to detect if an IR Led is on and if it is how intense is the light. For this purpose I tried to use a...

11 comments posted 12yrs

posted by cassiano

11 comments posted 12yrs posted by cassiano

Planet Monitoring System Using Sensors

Hello all, My group and I are designing a planet monitoring system that measures moist ure, sunlight, temperature, and...

7 comments posted 12yrs

posted by querida.ellis

7 comments posted 12yrs posted by querida.ellis

OT: Halogen Bulb Question

Installing some pendant lights in the kitchen. They came with this Halogen bulb: MR16 EXN+C 12V 50W The edge of this bu...

6 comments posted 12yrs

posted by To-Email-Use-The-Envelope-Icon

6 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon

±5V from up to +12v

I'm trying to design a remote controlled volume controller, and the chip I've chosen to control the volume needs ±5v fo...

35 comments posted 12yrs

posted by newsgroup.nospam

35 comments posted 12yrs posted by newsgroup.nospam

Multisim Files

Is there a SAFE viewer out there for MultiSim files (*.ms10)? Everything I find is an exe of questionable source. ...Ji...

3 comments posted 12yrs

posted by To-Email-Use-The-Envelope-Icon

3 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon

Antenna impedance

With reference to this schematic: http://www.pyroelectro.com/projects/pyro_rf_transmitter_27mhz/img/schematic.png I'd l...

18 comments posted 12yrs

posted by riccardomanfrin

18 comments posted 12yrs posted by riccardomanfrin

Ryobi battery pack

I have a 7.2 volt battery which appeared to have died. By repeated charging and discharging I have got it back to 6.97 v...

6 comments posted 12yrs

posted by dewhurst.roger

6 comments posted 12yrs posted by dewhurst.roger

Pin extraction tool

I have a Kenwood portable radio charger KVC-5A for my fire department radio. We purchased some new Kenwood radios. The...

3 comments posted 12yrs

posted by mark.gramlich

3 comments posted 12yrs posted by mark.gramlich

Linear amp emitter capacitors choice for 20Hz audio app

This is self assigned homework, so don't bother if this circuit is impract ical. I'm just following the basics. With re...

5 comments posted 12yrs

posted by riccardomanfrin

5 comments posted 12yrs posted by riccardomanfrin

OT: Source for this routed piece of wood

I'm looking for a source of this routed/shaped piece of wood... that I can stain and add to our new butler's pantry cab...

3 comments posted 12yrs

posted by To-Email-Use-The-Envelope-Icon

3 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon

Oscilloscope question

I have a TEK 465B 'scope. There are 8 divisions on the vertical axis of the graticule. When using a 10x probe does this...

7 comments posted 12yrs

posted by etpm

7 comments posted 12yrs posted by etpm

Very interesting 'scoping results

At least interesting to me. On the advice from members of this newsgroup I bought a 465B TEK oscilloscope. It comes in...

10 comments posted 12yrs

posted by etpm

10 comments posted 12yrs posted by etpm

Why is there foam tape on my amps heat sink

I have a 10 year old AV receiver that I opened to de-dust. I noticed that on the heat sink there a black foam material...

7 comments posted 12yrs

posted by N

7 comments posted 12yrs posted by N