Hello hello! I'm First time poster, long time reader
I'm working on a circuit that will control a linear solenoid and display the amount of voltage being outputted onto a 10 LED Bar Graph.
The position of the solenoids ram is controlled by voltage, 5.75VDC @ 0.85A (It may be 5VDC, I need to confirm) sets the ram all the way out of the solenoid body, 0VDC and the ram is all the way back in the solenoid body. It looks like the LM317 regulator is going to do just what I need I picked some info out of the SparkFun Breadboard Power Supply schematic that uses the LM317
As far as the LED bar graph goes, the **broken link removed** looks like its going to do all the work! Its an IC that senses voltage and drives the LEDs based on this
What I have so far is below.. sorry its a little rough, I'm no Picasso or Tesla
**broken link removed**
PAD1 is the positive 12VDC from the lead-acid battery
PAD2 is negative from the battery
PAD3 is the variable 0-5.75VDC+ output to the solenoid
PAD4 is negative to the solenoid
I haven't figured the exact values on the caps and resistors quite yet..
The output voltage IS NOT to exceed 5.75VDC
I'm told, when external capacitors are used with any IC regulator it is good practice to add protection diodes to prevent the capacitors discharging back into the regulator in the event of abnormal operating conditions, like a sudden short circuit on the input or the output, or a back emf from an inductive load. That is the function of D1 and D2.
The LM3914 will drive the LED bar graph so we have a visual display of how many volts are at the output to the solenoid (PAD3)
R2 is the POT used to control the output voltage
C1 is a ceramic capacitor. This goes across the incoming power leads and smooth out any ripples before it enters the regulator
C2 is a polarized aluminum or tantalum capacitor. This will go across the output leads, and give a smooth buffer effect when the output is adjusted. I think I need to use larger capacitors for a larger buffer?
C3 and C4 are two capacitors keep things stable for the LM3914, C4 smooths out rapid changes and spikes in the input signal to the LM3914, and C3 keeps the levels from being distorted by spikes when LEDs turn on and off.
So far does this look in order? I know something here has to be wrong, or there is a more efficient way this needs to be done. Please, comments, questions, ideas, help a noob out
I'm working on a circuit that will control a linear solenoid and display the amount of voltage being outputted onto a 10 LED Bar Graph.
The position of the solenoids ram is controlled by voltage, 5.75VDC @ 0.85A (It may be 5VDC, I need to confirm) sets the ram all the way out of the solenoid body, 0VDC and the ram is all the way back in the solenoid body. It looks like the LM317 regulator is going to do just what I need I picked some info out of the SparkFun Breadboard Power Supply schematic that uses the LM317
As far as the LED bar graph goes, the **broken link removed** looks like its going to do all the work! Its an IC that senses voltage and drives the LEDs based on this
What I have so far is below.. sorry its a little rough, I'm no Picasso or Tesla
**broken link removed**
PAD1 is the positive 12VDC from the lead-acid battery
PAD2 is negative from the battery
PAD3 is the variable 0-5.75VDC+ output to the solenoid
PAD4 is negative to the solenoid
I haven't figured the exact values on the caps and resistors quite yet..
The output voltage IS NOT to exceed 5.75VDC
I'm told, when external capacitors are used with any IC regulator it is good practice to add protection diodes to prevent the capacitors discharging back into the regulator in the event of abnormal operating conditions, like a sudden short circuit on the input or the output, or a back emf from an inductive load. That is the function of D1 and D2.
The LM3914 will drive the LED bar graph so we have a visual display of how many volts are at the output to the solenoid (PAD3)
R2 is the POT used to control the output voltage
C1 is a ceramic capacitor. This goes across the incoming power leads and smooth out any ripples before it enters the regulator
C2 is a polarized aluminum or tantalum capacitor. This will go across the output leads, and give a smooth buffer effect when the output is adjusted. I think I need to use larger capacitors for a larger buffer?
C3 and C4 are two capacitors keep things stable for the LM3914, C4 smooths out rapid changes and spikes in the input signal to the LM3914, and C3 keeps the levels from being distorted by spikes when LEDs turn on and off.
So far does this look in order? I know something here has to be wrong, or there is a more efficient way this needs to be done. Please, comments, questions, ideas, help a noob out