Engineering directional blasting circuit

(1) Circuit composition The wireless remote control electronic detonator consists of a wireless remote control transmitter and a wireless receiving detonation circuit. The wireless remote control
transmitter uses a finished four-key miniature remote control transmitter with built-in H9236D module (circuit diagram omitted).
    The wireless receiving detonation circuit consists of a power supply circuit, a wireless receiving control circuit, an oscillation boost circuit and a charge and discharge circuit, as shown in Figure 7-3.
    The power circuit is composed of battery GB, power switch S (Sa, Sb), power indicator light-emitting diode LED and current limiting resistor.
    The wireless receiving control circuit is composed of the wireless receiving module Ic, resistors RJ and R2, transistors VT1 and VT2, relays Kl and K2, and diodes
VD1 and VD2.
    The oscillation boost circuit is composed of Kl's normally open contact, resistor wind, transistor VT3, boost transformer T and rectifier diode VD3. !
． The charge and discharge circuit is composed of resistors F and M, capacitors cl and C2, and power switches Sb and K2's normally open contacts.
  (2) Circuit principle: After pressing the power switch S (Sa is on and Sb is off), the l LED lights up and the IC is powered on and enters the standby state.
When the A button on the remote control transmitter is pressed , IC receives the wireless signal through the antenna W, and its A terminal outputs a high level, causing VT1 to become saturated and conductive, Kl
energizes the suction table, and Kl's normally open contact is connected. When the oscillation boost circuit is powered on, VT3 is intermittently turned on, causing the W3 winding of T to generate a high
voltage of 800V. This voltage is rectified and flowed by VD3 to charge ci and G. About 5s, press the D key of the remote control transmitter again , the D signal of the IC
will become high level, causing VT2 to conduct and K2 to close. The normally open contact of K2 is connected, C, and G quickly
discharge the electric detonator through the wind and the normally open contact of K2, causing the electric detonator to explode. At the same time, the A terminal of lc becomes low-voltage, causing VT1 to cut off, Kl to release, and the oscillation boost circuit to cut off power and stop
working.
    Before connecting the electric detonator, the power switch S should be in the "off" position (that is, Sa is disconnected and Sb is connected)