Hi All!
I have a project which requires me to remotely adjust a voltage from 0 to 10V. There are some special considerations which require it not to be radio frequency control or a long wire. I'm thinking IR. (Read on...)
The device that is to be controlled is a regenerative DC motor drive board that varies the motor speed based upon a voltage at a pair of terminals.
I currently use a potentiometer as a voltage divider for this, but I don't want to be anywhere near the thing when its operating.
That motor turns a massive 12" diameter 3/4" thick Garrolite disc in an asynchronous rotary spark gap for my 6" 3.5kW Tesla Coil.
I want to build a remote control for it so I can adjust the speed of the motor (spark gap break-rate) while the coil is running.
I was thinking of using the LM2907 F-V converter IC to turn IR light pulses into a voltage for the motor controller. For a transmitter, I was thinking
of using a plain 555.
In my junk box I have most of these parts, including one of those Radio Shack IR receiver modules. It requires a carrier of 40kHz, which might be a good idea considering there may be a lot of IR interference from the sparks and other sources. (Massive EMF....)
So I was thinking two 555's or a 556 with one half dedicated to producing the carrier for the detector module and the other the frequency modulation. And lots of really big bright IR LED's.
Sound good? Does anyone have any good 555/556 examples for lightwave IR remote control?
I have a project which requires me to remotely adjust a voltage from 0 to 10V. There are some special considerations which require it not to be radio frequency control or a long wire. I'm thinking IR. (Read on...)
The device that is to be controlled is a regenerative DC motor drive board that varies the motor speed based upon a voltage at a pair of terminals.
I currently use a potentiometer as a voltage divider for this, but I don't want to be anywhere near the thing when its operating.
That motor turns a massive 12" diameter 3/4" thick Garrolite disc in an asynchronous rotary spark gap for my 6" 3.5kW Tesla Coil.
I want to build a remote control for it so I can adjust the speed of the motor (spark gap break-rate) while the coil is running.
I was thinking of using the LM2907 F-V converter IC to turn IR light pulses into a voltage for the motor controller. For a transmitter, I was thinking
of using a plain 555.
In my junk box I have most of these parts, including one of those Radio Shack IR receiver modules. It requires a carrier of 40kHz, which might be a good idea considering there may be a lot of IR interference from the sparks and other sources. (Massive EMF....)
So I was thinking two 555's or a 556 with one half dedicated to producing the carrier for the detector module and the other the frequency modulation. And lots of really big bright IR LED's.
Sound good? Does anyone have any good 555/556 examples for lightwave IR remote control?