It's a 2N2219A and that is just an ordinary NPN in a TO-5 package capable of a little power dissipation. Just about any high gain power transistor will work...
I've built all the circuits on techlib except the ones contributed by others. I used that one for months in my garden until I knocked it over and broke the...
That's a very low power op-amp that can run on a low voltage. What is your available power and must the circuit be micropower (batteries or power supply)?...
hey i am actuallly giving a 9v or 3v supply to the circuit.... but the thing is the piezo electric transducer will produce a very low signal output. and to...
If you can use 9 volts, just about any op-amp should work, especially those that are billed as "single supply" types. An ordinary LM358 should work but that is...
i am have op amp 741. thanks for ur reply.... i will try with LM 358. ... From: charleswenzel <charles@...> Subject: [techlibdotcom] Re: hello guys...
A 741 is specified down to 10 volts but it may work with only 9 volts just fine. Running on 9 volts will lower the sensitivity since there will be more voltage...
How about an LM324? 4 amps in the package are 3 too many, but the input bias currents and allowable supply voltage range are good. Input and output both can...
Hi guys, not really an electronics hobbyist, mostly a 60's classic car restorer, but often need help with updated electronic solutions for these cars. My...
... car ... the ... further info. sender unit is simple wound slider pot. (hope I am using the correct term), guage is simple voltmeter (12V) I imagine...
I'm not sure I understand older gauges but here goes: I think the sender is a variable resistor and the meter is a current meter. A resistor is added in series...
A "capacitor" will do it, dampen, but the experts can give you a better idea of what size and type. I have a drawer full of them; I would just experiment. Run...
... better idea of what size and type. I have a drawer full of them; I would just experiment. Run one side of the Cap to ground and the other to the gauge on...
... back ... zero ... that ... junction ... Do ... classic ... for ... float ... fluctuations on ... damped as ... Is ... result? ... thoughts? ... using ... ...
There's probably a resistor in the meter to limit current. The problem with using a capacitor without more circuitry is that it must be really big, like a...
If it swings around a lot it's probably a moving iron meter (there was a period of using hot wire meters but those are inherently very nicely damped) because...
Do you have the how-to for that? If so could you post it, I lost it some time ago and never found it again. Thanks! ... From: geo_k02 <geo_k02@...> ...
... problem ... resistor ... would ... large ... swing ... amp ... your ... the ... swing ... this ... axccesible ... have replied earlier have been away for a...
Hello again Charles OK have found out what an op amp is - local supplier has not got CA3160 but has CA3140E - 4.5 MHz slew rate 9v/us, 15v - will this suffice?...
Is there an archive with the older schematics from techlib.com??? I am in the process of working on several projects and was referring to teh web for...
... Actually - from the picture on the above web site, each transistor has its base & emitter shorted together. One of the transistors ... the left one, has...
