I've been working on a remote controlled activation unit.
I now have removed and altered a radio controlled circuit from a small remote controlled car that is 40 MHz...
I have one main problems with this design...
The 40 MHz receiver has 2 outputs that are normally both high at .8 VDC.
I'll make a small table with O# as output and T# as trigger input logic (Button 1 and 2 on receiver).
The outputs are set this way to control forward\reverse on a motor...
Idle:
T1 || 0
T2 || 0
O1 || 0.8
O2 || 0.8
Triggered:
T1 || 1
T2 || 0
O1 || 1.5
O2 || 0/-1.5
T1 || 0
T2 || 1
O1 || 0/-1.5
O2 || 1.5
I'm planning on only using one trigger to activate the circuit... The Triggered stage of the receiver is fine, but having current during the idle state is confusing me.
Here's a few things I've been thinking about trying...
Voltage Comparator (339 \ similar)
O1 or static source to Reference (V-?)
O2 through diode (for forward drop) to Comparison (V+?)
Theoretically, the Reference which should be .8v should register larger than the .2v Comparison after a forward drop from a 4148 diode, but I'm not sure if a comparator can compare such low voltages.
The circuit I'm trying to switch is pretty high voltage and can not use a mechanical relay (due to mechanical bounce).
I'm going to be using this circuit to fire an "electromagnetic metal accelerator"D) with a few hundred\thousand volts and a few farads of capacitance. The load will be controlled by an IGBT or SCR, most likely a 2N6509G (lead free 2N6509 800V 25A SCR [high pulse rating]).
An 2N6509 requires 1-1.5v @ 9-30mA to trigger.
Here's the summary:
I need a Comparator or XOR gate to determine a button has been pressed on the transmitter (changes the outputs from both high, to only one high), then I need that signal to be amplified to 9-30mA to trigger the SCR.
This seems very simple to me, yet I cannot figure out why it's not working...
I now have removed and altered a radio controlled circuit from a small remote controlled car that is 40 MHz...
I have one main problems with this design...
The 40 MHz receiver has 2 outputs that are normally both high at .8 VDC.
I'll make a small table with O# as output and T# as trigger input logic (Button 1 and 2 on receiver).
The outputs are set this way to control forward\reverse on a motor...
Idle:
T1 || 0
T2 || 0
O1 || 0.8
O2 || 0.8
Triggered:
T1 || 1
T2 || 0
O1 || 1.5
O2 || 0/-1.5
T1 || 0
T2 || 1
O1 || 0/-1.5
O2 || 1.5
I'm planning on only using one trigger to activate the circuit... The Triggered stage of the receiver is fine, but having current during the idle state is confusing me.
Here's a few things I've been thinking about trying...
Voltage Comparator (339 \ similar)
O1 or static source to Reference (V-?)
O2 through diode (for forward drop) to Comparison (V+?)
Theoretically, the Reference which should be .8v should register larger than the .2v Comparison after a forward drop from a 4148 diode, but I'm not sure if a comparator can compare such low voltages.
The circuit I'm trying to switch is pretty high voltage and can not use a mechanical relay (due to mechanical bounce).
I'm going to be using this circuit to fire an "electromagnetic metal accelerator"D) with a few hundred\thousand volts and a few farads of capacitance. The load will be controlled by an IGBT or SCR, most likely a 2N6509G (lead free 2N6509 800V 25A SCR [high pulse rating]).
An 2N6509 requires 1-1.5v @ 9-30mA to trigger.
Here's the summary:
I need a Comparator or XOR gate to determine a button has been pressed on the transmitter (changes the outputs from both high, to only one high), then I need that signal to be amplified to 9-30mA to trigger the SCR.
This seems very simple to me, yet I cannot figure out why it's not working...