ante

Hi Dazza, Well, I know the feeling I

Dazza, The circuit around T1 is just for checking the battery. You don

Hi Shahriar, I don

OK, my friend so anything goes. Tony

Hi Atheos, You can try to fit a load cell somewhere in the construction. The solution to this is not easy, it depends a great deal on the mechanical construction. Some platforms that are hydraulically manoeuvred can sometimes be sensed with a pressure switch if allowed by the geometry.

Hi John, Welcome to this forum. I would use an op-amp for this application. What do you mean,

12412, That

I can see your CD collection going down the drain right now, while you are trying to keep up with the demand. I am also missing the old blue stuff, I still have a small stock but I don

Hi 12412 (Fish), Is there any practically kind of circuits you like, radio, power, audio or something else? Please let us know.

Hi Audioguru, These are two great projects you have there (don

Hi Audioguru, There is not always a switch just two sockets on the side of the apparatus, it all comes down to the human factor here. 8) So, you are looking down the barrel of a bottle today? Well I hope your face is still happy anyway. ;D ;D Since you haven't seen any, I can tell you the 7807 looks just like the rest of the family. ;D ;D

Hi Oli, Sorry, that wasn

Stuee, Audioguru, Many handhelds both scanners and two way radios have there charger circuit built in but some of them also have different input connectors for power and charge. There is another inexpensive regulator the LM7807 that should be considered here as an alternative.

Hi Audioguru, Well, since the girl wants to measure the output voltage from a power supply I think it

Stuee, As long as the voltage is correct and the available current is higher than what you need it

Adam, The Rin resistor is the series resistor for the LED inside the opto. If you have 12 Volts input (vcc) a 390ohm 0.25W resistor will work. For the rest of the resistors use 0.5W or higher. Always be careful with mains, don

Hi Rhonn, I would suggest a transformer 230 to 2 X 9 Volts and a wattage corresponding to the load.

This is an instrument rectifier. It

Semdomcr, If you are using this circuit in a car I recommend a diode between 85 and 86 to protect the

You need an instrument rectifier.

Yes ;D

Absolutely right, I am glad that you have realized what

Hi Dazza, Well, you have to post pictures of the developing pressure transmitter for my approval of course! This is necessary since I don

Audioguru, Whats wrong with this sentence? (

Hi Steven, Oh, I see. Do you use plain tap water with no additives? Does it really conduct well enough to produce hydrogen? What voltages do you use and what current does it draw? What about the diode electrodes, do they corrode and disappear or can they withstand this for any length of time? Maybe the black stuff you get in the water is the result of corroding electrodes. It sounds very strange that bubbles could go sideways, like magic. ??? Yes we have nukepower here but they are very safe which could not be said for the Russians and eastern Europe plants which unfortunately isn